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Chat Roof solar design, installation and guidance, Help me design and install my roof solar

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TSpaskal
post Apr 13 2024, 08:15 AM, updated 2y ago

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Good morning and selamat hari raya all mighty and knowledgeable /k
i bow down to /k knowledge and wisdom and humbly request for tips & guidance for solar installation on my roof.

» Click to show Spoiler - click again to hide... «


i'm thinking of a 3kW or 4kW system and get RM3k or RM4k rebate.
there's a high chance that i'll be getting an EV before the december 2025 expiry on EV tax break.
a 500bhp high performance AWD car for RM200k is a very interesting proposition. expecting another RM100-ish electricity cost the EV?

so any guidance and tips from /k expertise in very much appreciated.
any good solar installer that covers northern area that /k can suggest? i'll try to get site visit and quotation after this raya holiday.
sparketh
post Apr 13 2024, 08:21 AM

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One thing about dolar panels, the technology is improving. My fren ordered a 300w solar panel system during mco time. So couldn't instal. Then 9 months later when installed, the installer said 300 panels dropped price edi cos 350watt panels are out so he got a free upgrade to 350. So u may want to wait tioo u get ur car since ur car sounds like its going to take a lot of kW. Alao always choose micro inverters for best efficiencies
Avangelice
post Apr 13 2024, 08:35 AM

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Here lies your problem bro,

Your current bill usage doesn't justify the cost of installing solar panels. IMHO bills above 300myr constantly justify dropping money on it. That said if you are buying an EV, you may wait for it to come first. Use it for a month then see how your bill increases.

Since time isn't on your side with the 4k subsidy from TNB, may I suggest if you could ask your friend to charge his car at your house and see how ur bill increases? Even with myr 100. A 250 myr monthly bill Macam tak berbaloi la in my honest opinion
dickybird
post Apr 13 2024, 08:41 AM

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Spend the money planting trees around your compound is better
Your bill is too low even with 2 EV.
DarkNite
post Apr 13 2024, 08:45 AM

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I also wonder is it worth spending after looking at the early adopters spending tens of thousands of Ringgit with at least 20 years ROI vs the current lower prices, faster ROI and better panels efficiency?
Avangelice
post Apr 13 2024, 08:46 AM

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QUOTE(dickybird @ Apr 13 2024, 08:41 AM)
Spend the money planting trees around your compound is better
Your bill is too low even with 2 EV.
*

listen to him TS. Ur bill very low. Use that money to beautify your house
maxpudding
post Apr 13 2024, 08:50 AM

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Wait after you getting your EV first then baru think about solar
Reality740716
post Apr 13 2024, 09:13 AM

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My bill also sky rocketing ever since changed to smart parking thing . Parking T&B
SuperTuhan
post Apr 13 2024, 09:20 AM

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So bloody fucking cheap

mine one big fridge, one small fridge
6 airconds at least one of it running all the time whole day 24 hours
no ev cars
daily use electric cloth dryer

bill average RM1300 per month
accordvtec
post Apr 13 2024, 09:33 AM

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u sure your meter is not tampered?
my house is smaller, 3 airconds every night, 2 fridge 1 chest freezer cost me around 700-1k+
knwong
post Apr 13 2024, 09:44 AM

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RM150 monthly bill many solar installers advise to do ENERGY SAVING. Not solar. I got that advise before so I ditched the idea. Solar is not the solution to your problem
haturaya
post Apr 13 2024, 09:46 AM

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QUOTE(accordvtec @ Apr 13 2024, 09:33 AM)
u sure your meter is not tampered?
my house is smaller, 3 airconds every night, 2 fridge 1 chest freezer cost me around 700-1k+
*
Something wrong with you meter or low efficiency AC units used. Check any air leak too. Stop all air draft.

My house with TNB smart meter - 3 AC 1hp inverter (On at 9pm till 6am daily), one 2 doors fridge, one chest freezer, Cucckoo water chiller & hot water (auto switch off at 11pm till 8am). Electricity bill hovering at RM300 - RM350 only. thumbup.gif

This post has been edited by haturaya: Apr 13 2024, 09:47 AM
Henry T
post Apr 13 2024, 09:46 AM

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Make sure your roof is in good condition before installing the solar panels. Repairing any leaks, with the panels on top will be a huge problem.
accordvtec
post Apr 13 2024, 11:09 AM

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QUOTE(haturaya @ Apr 13 2024, 09:46 AM)
Something wrong with you meter or low efficiency AC units used. Check any air leak too. Stop all air draft.

My house with TNB smart meter - 3 AC 1hp inverter (On at 9pm till 6am daily), one 2 doors fridge, one chest freezer, Cucckoo water chiller & hot water (auto switch off at 11pm till 8am). Electricity bill hovering at RM300 - RM350 only.  thumbup.gif
*
hah? really?
i got 3hp inverter cassette open about 12hrs.
when tidor all go back to room and open
1x 2hp inverter for my room
1x 2hp non inverter for my kid
1x 1hp kinda old non inverter for doter.

as for fridge, 1x 4 doors 600L toshiba inverter
few small verticle fridge outdoor and a chest freezer 120L.

other electronics include 1x home server 24/7, 1x gaming pc 24/7, 1x water pump 1.5hp, the rest are just common household item like washing machine, vacuum, charger, tv, fan for maid etc.

also running on smart meter.

lowest was 600+ when we went for holiday for 1 week.
highest was feb during cny 1k+.
now waiting for solar installation 14.5kW coz got shocked by that 1k+ bill LOL.
march was rm7xx.

what do u think consume the most electric besides the 12hr 3hp inverter? kinda dumb on this thing.
enduser
post Apr 13 2024, 11:16 AM

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Bos, get a few quotations from solar installer,
They will survey ur house n give the detail

Can pm me for few installer contact
corad
post Apr 13 2024, 11:18 AM

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I'm also interested for solar panel. Total newbie just wondering :

1. For solar panel orientation, which phase/time is the best to catch ? The back of my house gets the morning sun, and front gets evening sun.

2. I'm assuming the panels are connected to a battery ? What battery is recommended ? Tesla Powerwall ?

3. Is there a need to wash the panels ? If so how is it done as my roof has no access for regular maintenance. Also worried about damaging the roofing sheets
haturaya
post Apr 13 2024, 11:27 AM

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QUOTE(accordvtec @ Apr 13 2024, 11:09 AM)
hah? really?
i got 3hp inverter cassette open about 12hrs.
when tidor all go back to room and open
1x 2hp inverter for my room
1x 2hp non inverter for my kid
1x 1hp kinda old non inverter for doter.

as for fridge, 1x 4 doors 600L toshiba inverter
few small verticle fridge outdoor and a chest freezer 120L.

other electronics include 1x home server 24/7, 1x gaming pc 24/7, 1x water pump 1.5hp, the rest are just common household item like washing machine, vacuum, charger, tv, fan for maid etc.

also running on smart meter.

lowest was 600+ when we went for holiday for 1 week.
highest was feb during cny 1k+.
now waiting for solar installation 14.5kW coz got shocked by that 1k+ bill LOL.
march was rm7xx.

what do u think consume the most electric besides the 12hr 3hp inverter? kinda dumb on this thing.
*
Lots of non inverter appliances you have. So many fridge, water pump - over provision.
zuozi
post Apr 13 2024, 11:28 AM

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TS tnb bill too low my house ada 5 AC plus 2 gaming PC/2 normal PC my room Aircon definitely everyday more than 12 hour other probably few hours since old folk's afraid too cold also exceed RM 500 tnb bill monthly, last months start already exceed RM 700 because bukak and yolo only who care climate change.
etan26
post Apr 13 2024, 11:28 AM

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QUOTE(haturaya @ Apr 13 2024, 09:46 AM)
Something wrong with you meter or low efficiency AC units used. Check any air leak too. Stop all air draft.

My house with TNB smart meter - 3 AC 1hp inverter (On at 9pm till 6am daily), one 2 doors fridge, one chest freezer, Cucckoo water chiller & hot water (auto switch off at 11pm till 8am). Electricity bill hovering at RM300 - RM350 only.  thumbup.gif
*
This one need TNB go check for suspicious theft .... unless you ada pakai solar system....
munak991
post Apr 13 2024, 11:28 AM

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QUOTE(corad @ Apr 13 2024, 11:18 AM)
I'm also interested for solar panel. Total newbie just wondering :

1. For solar panel orientation, which phase/time is the best to catch ? The back of my house gets the morning sun, and front gets evening sun.

2. I'm assuming the panels are connected to a battery ? What battery is recommended ? Tesla Powerwall ?

3. Is there a need to wash the panels ? If so how is it done as my roof has no access for regular maintenance. Also worried about damaging the roofing sheets
*
1) base on my present output average, 10am to 3pm is the maximum output period, my house face south.

2) apply NEM3.0 from SEDA, u sell back to TNB. Contract is 10 years. Most solar company help u apply .After 10 years, then u see battery how much.

3) depends on your output, if it drop over months, then need to clean d. Call ppl to service. Some give free service.

This post has been edited by munak991: Apr 13 2024, 11:29 AM
Avangelice
post Apr 13 2024, 11:31 AM

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QUOTE(haturaya @ Apr 13 2024, 11:27 AM)
Lots of non inverter appliances you have. So many fridge, water pump - over provision.
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2hp for a bedroom is overkill. He should do the btu calculation base on Sq ftage of each room. 1hp enough for the small bedroom and master bedroom maybe 1.5hp.

I have a 2hp non inverter that's causing my bill to shoot up and I'm looking to replace it
haturaya
post Apr 13 2024, 11:32 AM

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QUOTE(etan26 @ Apr 13 2024, 11:28 AM)
This one need TNB go check for suspicious theft .... unless you ada pakai solar system....
*
What theft? My bill reduce a bit after TNB change to smart meter 3 years ago. My old meter bill is way more expensive. cool2.gif No solar. Small house only and my house roof orientation is bad for solar panel. sweat.gif It will take ages to recoup the investment. sweat.gif

Keyword is thermal efficiency.

Use inverter AC, calculate right hp for the room (btu & room size). Never ever over cool the space. For example, setting the AC temp to 18C. No way in Malaysia you can cool down (efficiently) any living space more than 6-7C from ambient temperature. Check ambient temperature as guidance for AC desired temp.
Seal all air gap in the room (door sills, windows, ceiling, proper roof insulation etc).
Thermal barrier for wall that radiate so much thermal energy (radiant heat) into living space. Especially for wall that facing evening hot sun.
Switch off / schedule high energy appliances when nobody not at home (water chiller & hot water).
Use ceiling ventilator to suck out hot air from top floor.

Many things can be done to make your home use way less energy. cool2.gif

This post has been edited by haturaya: Apr 13 2024, 11:42 AM
lj0000
post Apr 13 2024, 11:32 AM

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Check with tnb first if your area allow feed in.
If cannot don't bother starting calculation
smallcrab
post Apr 13 2024, 11:34 AM

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First convert to 3 phase wiring for charging EV, will be much faster charge (x3 faster)

Later if electric bill is high enough, only consider solar.
accordvtec
post Apr 13 2024, 11:41 AM

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QUOTE(haturaya @ Apr 13 2024, 11:27 AM)
Lots of non inverter appliances you have. So many fridge, water pump - over provision.
*
but fridge all inverter. only chest freezer is not. waterpump must oh coz 4 rooms with attached toilet and 1 common toilet downstair if off waterpump then pressure like kencing.
Avangelice
post Apr 13 2024, 11:43 AM

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QUOTE(accordvtec @ Apr 13 2024, 11:41 AM)
but fridge all inverter. only chest freezer is not. waterpump must oh coz 4 rooms with attached toilet and 1 common toilet downstair if off waterpump then pressure like kencing.
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2hp x 2. There's ur problem
haturaya
post Apr 13 2024, 11:45 AM

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QUOTE(accordvtec @ Apr 13 2024, 11:41 AM)
but fridge all inverter. only chest freezer is not. waterpump must oh coz 4 rooms with attached toilet and 1 common toilet downstair if off waterpump then pressure like kencing.
*
The non inverter AC is the killer... sweat.gif

Water pump - for 4 bathroom... 200W is more than enough. It's highly unlikely you'll be using all taps in all bathrooms at the same time. sweat.gif That's why I wrote it's over provision.

My house water pump - only 150W, for 2 bathroom with a shower, toilet, wall pipe and a sink each. All good thumbsup.gif
adamw
post Apr 13 2024, 12:01 PM

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QUOTE(paskal @ Apr 13 2024, 08:15 AM)
Good morning and selamat hari raya all mighty and knowledgeable /k
i bow down to /k knowledge and wisdom and humbly request for tips & guidance for solar installation on my roof.

» Click to show Spoiler - click again to hide... «


i'm thinking of a 3kW or 4kW system and get RM3k or RM4k rebate.
there's a high chance that i'll be getting an EV before the december 2025 expiry on EV tax break.
a 500bhp high performance AWD car for RM200k is a very interesting proposition. expecting another RM100-ish electricity cost the EV?

so any guidance and tips from /k expertise in very much appreciated.
any good solar installer that covers northern area that /k can suggest? i'll try to get site visit and quotation after this raya holiday.
*
Any real picture of the rooftop?
dickybird
post Apr 13 2024, 12:05 PM

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Rainwater collection system and more trees is a better bet I think. As well as spraying your roof white.
I think you’ve designed and built your home intelligently hence the low power bill. Even if you do nothing, it would be very good as it is.
accordvtec
post Apr 13 2024, 12:34 PM

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QUOTE(Avangelice @ Apr 13 2024, 11:43 AM)
2hp x 2. There's ur problem
*
really? we use around 26-28°C only coz too cold lol

QUOTE(haturaya @ Apr 13 2024, 11:45 AM)
The non inverter AC is the killer...  sweat.gif

Water pump - for 4 bathroom... 200W is more than enough. It's highly unlikely you'll be using all taps in all bathrooms at the same time.  sweat.gif  That's why I wrote it's over provision.

My house water pump - only 150W, for 2 bathroom with a shower, toilet, wall pipe and a sink each. All good  :thumbsup:
*
duno how to see watt co bought that time just mention how many hp. i checked again, it was 1.05hp not 1.5hp lol.
keyibukeyi
post Apr 13 2024, 12:49 PM

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all looks good, add in intake fan and exhaust fan for better air circulation. TS forgot add in wind direction.
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post Apr 13 2024, 01:25 PM

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QUOTE(paskal @ Apr 13 2024, 08:15 AM)
Good morning and selamat hari raya all mighty and knowledgeable /k
i bow down to /k knowledge and wisdom and humbly request for tips & guidance for solar installation on my roof.

» Click to show Spoiler - click again to hide... «


i'm thinking of a 3kW or 4kW system and get RM3k or RM4k rebate.
there's a high chance that i'll be getting an EV before the december 2025 expiry on EV tax break.
a 500bhp high performance AWD car for RM200k is a very interesting proposition. expecting another RM100-ish electricity cost the EV?

so any guidance and tips from /k expertise in very much appreciated.
any good solar installer that covers northern area that /k can suggest? i'll try to get site visit and quotation after this raya holiday.
*
Ev total cost of ownership
No oil change still need servicing”
Tyres need to change every 30k or less
Suspension also will take a beating up north and that’s why northern people buy car and use PG plates to lessens the depreciation from the perception of Northern plate cars being driven on bad roads.
ozak
post Apr 13 2024, 01:29 PM

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QUOTE
the house orientation is 320 degrees northwest. with large portion of the roof facing the west and east side.
since the location is really good for solar installation, the house was designed and built with solar in mind.


If not mistaken, roof facing west and east is not optimum for solar panel.

If the whole roof install panel, morning east panel get sunlight and afternoon west panel get sunlight.

Optimum for panel is roof facing south with 15º deg slope. Sun pass left to right and whole yrs max.
Boy96
post Apr 13 2024, 01:34 PM

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QUOTE(smallcrab @ Apr 13 2024, 11:34 AM)
First convert to 3 phase wiring for charging EV, will be much faster charge (x3 faster)

Later if electric bill is high enough, only consider solar.
*
Ts planning to get byd seal which only supports single phase charging
smallcrab
post Apr 13 2024, 01:50 PM

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QUOTE(Boy96 @ Apr 13 2024, 01:34 PM)
Ts planning to get byd seal which only supports single phase charging
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single phase at home, charging time must be very long?
commonsense
post Apr 13 2024, 01:58 PM

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wow your tnb bill so low without solar
terradrive
post Apr 13 2024, 02:05 PM

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QUOTE(paskal @ Apr 13 2024, 08:15 AM)
Good morning and selamat hari raya all mighty and knowledgeable /k
i bow down to /k knowledge and wisdom and humbly request for tips & guidance for solar installation on my roof.

» Click to show Spoiler - click again to hide... «


i'm thinking of a 3kW or 4kW system and get RM3k or RM4k rebate.
there's a high chance that i'll be getting an EV before the december 2025 expiry on EV tax break.
a 500bhp high performance AWD car for RM200k is a very interesting proposition. expecting another RM100-ish electricity cost the EV?

so any guidance and tips from /k expertise in very much appreciated.
any good solar installer that covers northern area that /k can suggest? i'll try to get site visit and quotation after this raya holiday.
*
depends if you wanna get battery or not too

if you wanna take need to consider how many cycles the batteries can be used for, solar gel 400-1600 cycles, LFP ~4000 cycles
layzieboy
post Apr 13 2024, 03:23 PM

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QUOTE(smallcrab @ Apr 13 2024, 01:50 PM)
single phase at home, charging time must be very long?
*
Actually better for the battery. You gonna charge overnight anyway.
netmatrix
post Apr 13 2024, 03:27 PM

The machine... it sees everything.
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Kampung house got cheaper electricity rate ke?
Boy96
post Apr 13 2024, 07:21 PM

That's a tripod.
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QUOTE(smallcrab @ Apr 13 2024, 01:50 PM)
single phase at home, charging time must be very long?
*
Battery size is 83kWh. Car can receive 6.7kWh per hour. So sendiri count how many hours to fill up from empty
Seawater
post Apr 13 2024, 07:43 PM

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Does chest freezer use less energy compared to normal one?
max_cavalera
post Apr 13 2024, 08:05 PM

rebirth
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No need spend so much on CAPEX.

Register with tnb or gentari lease your roof to them for solar installation and maintenance.

20 years warranty iinm. They will give you 20% or more discount on your monthly bill.

You only need to pay rm1-2k deposit to start.

boy96 anak megah holding will clarify more for you
TSpaskal
post Apr 13 2024, 09:24 PM

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wasn't expecting so many replies.
thanks a lot everyone for the feedback.

QUOTE(sparketh @ Apr 13 2024, 08:21 AM)
One thing about dolar panels, the technology is  improving.  My fren ordered a 300w solar panel system during mco time. So couldn't instal. Then 9 months later when installed, the installer said 300 panels dropped price edi cos 350watt panels are out so he got a free upgrade to 350.  So u may want to wait tioo u get ur car since ur car sounds like its going to take a lot of kW.  Alao always choose micro inverters for best efficiencies
*
tq. noted.
the RM1k rebate might get snatched up before end of 2024. probably can't wait that long.

QUOTE(Avangelice @ Apr 13 2024, 08:35 AM)
Here lies your problem bro,

Your current bill usage doesn't justify the cost of installing solar panels. IMHO bills above 300myr constantly justify dropping money on it. That said if you are buying an EV, you may wait for it to come first. Use it for a month then see how your bill increases.

Since time isn't on your side with the 4k subsidy from TNB, may I suggest if you could ask your friend to charge his car at your house and see how ur bill increases? Even with myr 100. A 250 myr monthly bill Macam tak berbaloi la in my honest opinion
*

a friend has the dolphin. but IINM i won't be able to charge it from the normal 3 prong plug?
we need that special wall box to charge an EV right?

QUOTE(dickybird @ Apr 13 2024, 08:41 AM)
Spend the money planting trees around your compound is better
Your bill is too low even with 2 EV.
*
lots of trees already.
» Click to show Spoiler - click again to hide... «

entire compound is now surrounded by trees. and the rear of the house is surrounded by green paddy field.
TSpaskal
post Apr 13 2024, 09:35 PM

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QUOTE(maxpudding @ Apr 13 2024, 08:50 AM)
Wait after you getting your EV first then baru think about solar
*
can't wait that long.
that Skim Insentif Solar Rakyat rebate will be snatched up before i get an EV.

waiting for gov to announce the new EV roadtax scheme. if they slap RM3k for 500bhp EV roadtax mampos.

QUOTE(Reality740716 @ Apr 13 2024, 09:13 AM)
My bill also sky rocketing ever since changed to smart parking thing . Parking T&B
*
can clarify what is smart parking? i don't understand.

QUOTE(SuperTuhan @ Apr 13 2024, 09:20 AM)
So bloody fucking cheap

mine one big fridge, one small fridge
6 airconds at least one of it running all the time whole day 24 hours
no ev cars
daily use electric cloth dryer

bill average RM1300 per month
*
you go buy a FLIR/thermal camera and see if there's any hotspot or cold air leak from the room.
also good to insulate the entire roof to reduce heat from the rooftop.


QUOTE(accordvtec @ Apr 13 2024, 09:33 AM)
u sure your meter is not tampered?
my house is smaller, 3 airconds every night, 2 fridge 1 chest freezer cost me around 700-1k+
*
not tempered in any way.
it's the new TNB smart meter i think.

i did the entire wiring myself so no it's not modded in any way.
TSpaskal
post Apr 13 2024, 09:47 PM

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QUOTE(knwong @ Apr 13 2024, 09:44 AM)
RM150 monthly bill many solar installers advise to do ENERGY SAVING. Not solar. I got that advise before so I ditched the idea. Solar is not the solution to your problem
*
i've probably done some sort of energy saving. that's why my energy cost is low.
i don't really have a problem with the energy bill since it's low as it is.

but consider this.
if i spend RM14k for a 4kW system and get RM4k rebate.
so total spent is only RM10k to generate about 400kW of power monthly.
400kW would allow me to contra about RM150-ish a month allowing me to have RM0 TNB bill.

RM10k / RM150 = 5.6 years of ROI then i'll get to live for the other 4.4 year on free electricity.
quite a good investment, no?

QUOTE(enduser @ Apr 13 2024, 11:16 AM)
Bos, get a few quotations from solar installer,
They will survey ur house n give the detail

Can pm me for few installer contact
*
thanks will PM you.

QUOTE(zuozi @ Apr 13 2024, 11:28 AM)
TS tnb bill too low my house ada 5 AC plus 2 gaming PC/2 normal PC my room Aircon definitely everyday more than 12 hour other probably few hours since old folk's afraid too cold also exceed RM 500 tnb bill monthly, last months start already exceed RM 700 because bukak and yolo only who care climate change.
*
yes probably too low for a solar system.

QUOTE(lj0000 @ Apr 13 2024, 11:32 AM)
Check with tnb first if your area allow feed in.
If cannot don't bother starting calculation
*
thanks. will need to check with TNB branch that handle this area.
thanks for the heads up.
dickybird
post Apr 13 2024, 09:50 PM

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QUOTE(paskal @ Apr 13 2024, 09:24 PM)
wasn't expecting so many replies.
thanks a lot everyone for the feedback.
tq. noted.
the RM1k rebate might get snatched up before end of 2024. probably can't wait that long.
a friend has the dolphin. but IINM i won't be able to charge it from the normal 3 prong plug?
we need that special wall box to charge an EV right?
lots of trees already.
» Click to show Spoiler - click again to hide... «

entire compound is now surrounded by trees. and the rear of the house is surrounded by green paddy field.
*
Find the best IR rejection exterior paint in white and spray paint the roof lo.
Nice house.
alfiejr
post Apr 13 2024, 09:53 PM

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To get that solaris rebate, you probably need to install at minimum 6kwp. So that your solar system will generate maybe around 3 to 4 kwac ?

So you're looking roughly around rm20k of investment for that nem system.

This post has been edited by alfiejr: Apr 13 2024, 09:54 PM
Boy96
post Apr 13 2024, 09:58 PM

That's a tripod.
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QUOTE(max_cavalera @ Apr 13 2024, 08:05 PM)
No need spend so much on CAPEX.

Register with tnb or gentari lease your roof to them for solar installation and maintenance.

20 years warranty iinm. They will give you 20% or more discount on your monthly bill.

You only need to pay rm1-2k deposit to start.

boy96 anak megah holding will clarify more for you
*
Not worth it for ts

After pasang that solar lease you will need to pay over 45cents/kWh

TS current bill without solar not even hit that tier.
ozak
post Apr 13 2024, 10:01 PM

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QUOTE(Seawater @ Apr 13 2024, 07:43 PM)
Does chest freezer use less energy compared to normal one?
*
Yes.
TSpaskal
post Apr 13 2024, 10:03 PM

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QUOTE(smallcrab @ Apr 13 2024, 11:34 AM)
First convert to 3 phase wiring for charging EV, will be much faster charge (x3 faster)

Later if electric bill is high enough, only consider solar.
*
the house is already on 3 phase wiring.

QUOTE(haturaya @ Apr 13 2024, 11:45 AM)
The non inverter AC is the killer...  sweat.gif

Water pump - for 4 bathroom... 200W is more than enough. It's highly unlikely you'll be using all taps in all bathrooms at the same time.  sweat.gif  That's why I wrote it's over provision.

My house water pump - only 150W, for 2 bathroom with a shower, toilet, wall pipe and a sink each. All good  thumbsup.gif
*
my house has 2x 0.5hp (370W) water pump.
one for the sedimentation tank and another one from the sedimentation tank to the storage tank.
from the storage tank it's gravity fed to all 5 bathroom.

no loss of pressure since there's multiple distribution pipe. all 1 inch diameter.
another energy saving design to reduce pump cycle.

QUOTE(adamw @ Apr 13 2024, 12:01 PM)
Any real picture of the rooftop?
*
» Click to show Spoiler - click again to hide... «

the roof area is built according to the drawing.
measurement from the drawing doesn't differ much.

QUOTE(dickybird @ Apr 13 2024, 12:05 PM)
Rainwater collection system and more trees is a better bet I think. As well as spraying your roof white.
I think you’ve designed and built your home intelligently hence the low power bill. Even if you do nothing, it would be very good as it is.
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the entire roof is heavily insulated with 3inch glass wool.
» Click to show Spoiler - click again to hide... «

beneath the glass wool there's a double woven aluminum sheet. even during hot midday sun the roof temperature is kept at around 37 degrees.

the entire roof structure is then ventilated with aluminium louvers to further reduce trapped heat.
there's already rainwater collection that i use for irrigation purpose.
maxpudding
post Apr 13 2024, 10:05 PM

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QUOTE(paskal @ Apr 13 2024, 09:47 PM)
but consider this.
if i spend RM14k for a 4kW system and get RM4k rebate.
so total spent is only RM10k to generate about 400kW of power monthly.
400kW would allow me to contra about RM150-ish a month allowing me to have RM0 TNB bill.
*
Are you going to apply for NEM? Or selco (off-grid)?

If selco, you can reduce your bill theoretically to RM0 because there wont be any limit in terms of solar pv capacity, but you need to get an energy storage system if you plan to continue use the energy at night.

But, if you plan to go for NEM (grid connected), the current capacity limit is 85% of your maximum demand, so you still have to pay for TNB bills.
dickybird
post Apr 13 2024, 10:06 PM

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QUOTE(paskal @ Apr 13 2024, 10:03 PM)
the house is already on 3 phase wiring.
my house has 2x 0.5hp (370W) water pump.
one for the sedimentation tank and another one from the sedimentation tank to the storage tank.
from the storage tank it's gravity fed to all 5 bathroom.

no loss of pressure since there's multiple distribution pipe. all 1 inch diameter.
another energy saving design to reduce pump cycle.
» Click to show Spoiler - click again to hide... «

the roof area is built according to the drawing.
measurement from the drawing doesn't differ much.
the entire roof is heavily insulated with 3inch glass wool.
» Click to show Spoiler - click again to hide... «

beneath the glass wool there's a double woven aluminum sheet. even during hot midday sun the roof temperature is kept at around 37 degrees.

the entire roof structure is then ventilated with aluminium louvers to further reduce trapped heat.
there's already rainwater collection that i use for irrigation purpose.
*
Wow really well thought out
TSpaskal
post Apr 13 2024, 10:24 PM

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QUOTE(keyibukeyi @ Apr 13 2024, 12:49 PM)
all looks good, add in intake fan and exhaust fan for better air circulation. TS forgot add in wind direction.
*
» Click to show Spoiler - click again to hide... «

there's no intake and exhaust fan anywhere in the house.
it's all natural ventilation.

general wind direction is as above.

QUOTE(dickybird @ Apr 13 2024, 01:25 PM)
Ev total cost of ownership
No oil change still need servicing”
Tyres need to change every 30k or less
Suspension also will take a beating up north and that’s why northern people buy car and use PG plates to lessens the depreciation from the perception of Northern plate cars being driven on bad roads.
*
true. suspension does take a beating.
» Click to show Spoiler - click again to hide... «

there's a lot of these agriculture dirt road everywhere.
it's better to drive a tall SUV than a low slung sports car over here.

QUOTE(ozak @ Apr 13 2024, 01:29 PM)
If not mistaken, roof facing west and east is not optimum for solar panel.

If the whole roof install panel, morning east panel get sunlight and afternoon west panel get sunlight.

Optimum for panel is roof facing south with 15º deg slope. Sun pass left to right and whole yrs max.
*
haiya.
i designed the wrong roof then.
solar is really not my forte.
i used to think solar facing the west is the best to catch the most sunshine. doh.gif

QUOTE(Boy96 @ Apr 13 2024, 01:34 PM)
Ts planning to get byd seal which only supports single phase charging
*
yes the 500bhp AWD byd seal is mighty enticing.
that, or the upcoming byd sea lion SUV.

an SUV will be better for the roads that we have up here.
slap a small 15-16" rim and some thick all terrain tyres hngghhhh
» Click to show Spoiler - click again to hide... «
dickybird
post Apr 13 2024, 10:26 PM

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QUOTE(paskal @ Apr 13 2024, 10:24 PM)
» Click to show Spoiler - click again to hide... «

there's no intake and exhaust fan anywhere in the house.
it's all natural ventilation.

general wind direction is as above.
true. suspension does take a beating.
» Click to show Spoiler - click again to hide... «

there's a lot of these agriculture dirt road everywhere.
it's better to drive a tall SUV than a low slung sports car over here.
haiya.
i designed the wrong roof then.
solar is really not my forte.
i used to think solar facing the west is the best to catch the most sunshine.  doh.gif
yes the 500bhp AWD byd seal is mighty enticing.
that, or the upcoming byd sea lion SUV.

an SUV will be better for the roads that we have up here.
slap a small 15-16" rim and some thick all terrain tyres hngghhhh
» Click to show Spoiler - click again to hide... «

*
Hailat ftw!
Ev will be the first to die in the coming apocalypse
Haven’t you seen Mad Max?!
Lol
hjh87
post Apr 13 2024, 10:34 PM

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QUOTE(Boy96 @ Apr 13 2024, 09:58 PM)
Not worth it for ts

After pasang that solar lease you will need to pay over 45cents/kWh

TS current bill without solar not even hit that tier.
*
Not sure about the Gentari leasing, but from TNB should be "SARE" which is only applicable to commercial & industrial not?
maxpudding
post Apr 13 2024, 10:43 PM

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QUOTE(paskal @ Apr 13 2024, 10:24 PM)
haiya.
i designed the wrong roof then.
solar is really not my forte.
i used to think solar facing the west is the best to catch the most sunshine.  doh.gif
*
Rule of thumb for any solar installation:

1. If you live in the northern hemisphere, your solar panels should be facing south (and vice versa).
2. Angle of the solar panels should be according to the latitude.

These two are just the starting points, actual calculations for optimal placement, angle and directions of solar panel depends on your location, surrounding trees/buildings, and many other factors.

In some areas, facing west would be the most optimal direction in certain months of the year, but in general, the panels should face south.
zuozi
post Apr 13 2024, 11:33 PM

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QUOTE(maxpudding @ Apr 13 2024, 10:43 PM)
Rule of thumb for any solar installation:

1. If you live in the northern hemisphere, your solar panels should be facing south (and vice versa).
2. Angle of the solar panels should be according to the latitude.

These two are just the starting points, actual calculations for optimal placement, angle and directions of solar panel depends on your location, surrounding trees/buildings, and many other factors.

In some areas, facing west would be the most optimal direction in certain months of the year, but in general, the panels should face south.
*
If I'm TS might as well set-up automated rotation support for the solar panel janji can fork out extra cash for cool tech if you get what i mean rather than measuring here and there so much hassle 😁
maxpudding
post Apr 14 2024, 01:14 AM

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QUOTE(zuozi @ Apr 13 2024, 11:33 PM)
If I'm TS might as well set-up automated rotation support for the solar panel  janji can fork out extra cash for cool tech if you get what i mean rather than measuring here and there so much hassle 😁
*
While it is cool looking tech but it’s not feasible. Better stick at one position and be done with it.
xHj09
post Apr 14 2024, 01:57 AM

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QUOTE(Avangelice @ Apr 13 2024, 08:35 AM)
Here lies your problem bro,

Your current bill usage doesn't justify the cost of installing solar panels. IMHO bills above 300myr constantly justify dropping money on it. That said if you are buying an EV, you may wait for it to come first. Use it for a month then see how your bill increases.

Since time isn't on your side with the 4k subsidy from TNB, may I suggest if you could ask your friend to charge his car at your house and see how ur bill increases? Even with myr 100. A 250 myr monthly bill Macam tak berbaloi la in my honest opinion
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there are people who only turn on higher consuming electronics like aircond for 2-3 hours a night before sleep..

with solar installed, they don't really have to be so "stingy" on the usage of electronics already.

e.g. PC can on 24/7, get EV, longer hours of air-conditioning on daily basis.
adamw
post Apr 14 2024, 10:02 AM

Back to serve justice to those PKHKC corrupted Ex-ministers!
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QUOTE(maxpudding @ Apr 13 2024, 10:05 PM)
Are you going to apply for NEM? Or selco (off-grid)?

If selco, you can reduce your bill theoretically to RM0 because there wont be any limit in terms of solar pv capacity, but you need to get an energy storage system if you plan to continue use the energy at night.

But, if you plan to go for NEM (grid connected), the current capacity limit is 85% of your maximum demand, so you still have to pay for TNB bills.
*
Actually, not enforced minimum rm 10 TNB if generation exceeds consumption.
max_cavalera
post Apr 14 2024, 10:14 AM

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QUOTE(paskal @ Apr 13 2024, 11:24 PM)
» Click to show Spoiler - click again to hide... «

there's no intake and exhaust fan anywhere in the house.
it's all natural ventilation.

general wind direction is as above.
true. suspension does take a beating.
» Click to show Spoiler - click again to hide... «

there's a lot of these agriculture dirt road everywhere.
it's better to drive a tall SUV than a low slung sports car over here.
haiya.
i designed the wrong roof then.
solar is really not my forte.
i used to think solar facing the west is the best to catch the most sunshine.  doh.gif
yes the 500bhp AWD byd seal is mighty enticing.
that, or the upcoming byd sea lion SUV.

an SUV will be better for the roads that we have up here.
slap a small 15-16" rim and some thick all terrain tyres hngghhhh
» Click to show Spoiler - click again to hide... «

*
Try small scale DIY solar farming first ler.

Anneh see kat lesapdah they sell CATL lfp battery pack. 1 pack capacity 0.38kwh. Buy little by little to scale up. Buy a 3kw inverter. Solar panel lil by lil to scale up. Anchor it on your roof. Connect it to your ac wallbox charger…
maxpudding
post Apr 14 2024, 11:11 AM

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QUOTE(adamw @ Apr 14 2024, 10:02 AM)
Actually, not enforced minimum rm 10 TNB if generation exceeds consumption.
*
Yeah at least there’s a minimum bill

TNB also wants to cari makan
dickybird
post Apr 14 2024, 02:40 PM

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QUOTE(paskal @ Apr 13 2024, 10:24 PM)
» Click to show Spoiler - click again to hide... «

there's no intake and exhaust fan anywhere in the house.
it's all natural ventilation.

general wind direction is as above.
true. suspension does take a beating.
» Click to show Spoiler - click again to hide... «

there's a lot of these agriculture dirt road everywhere.
it's better to drive a tall SUV than a low slung sports car over here.
haiya.
i designed the wrong roof then.
solar is really not my forte.
i used to think solar facing the west is the best to catch the most sunshine.  doh.gif
yes the 500bhp AWD byd seal is mighty enticing.
that, or the upcoming byd sea lion SUV.

an SUV will be better for the roads that we have up here.
slap a small 15-16" rim and some thick all terrain tyres hngghhhh
» Click to show Spoiler - click again to hide... «

*
How much did it cost to make your roof?
ozak
post Apr 14 2024, 03:46 PM

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QUOTE(paskal @ Apr 13 2024, 10:24 PM)

haiya.
i designed the wrong roof then.
solar is really not my forte.
i used to think solar facing the west is the best to catch the most sunshine.  doh.gif
If you want advice/installer/ quote, PM me.

But not sure he want go as far to north.
max_cavalera
post Apr 14 2024, 05:06 PM

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