Welcome Guest ( Log In | Register )

4 Pages < 1 2 3 4 >Bottom

Outline · [ Standard ] · Linear+

 Home solar 4 months in.

views
     
backspace66
post Jul 8 2025, 10:07 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(I-Kurosaki @ Jul 7 2025, 08:41 AM)
Mine is a string inverter setup. My roof is single slope metal roofing so don't need micro.
Truth to be told, I gauged my solar performance with my surrounding neighbors (all 4 of them are on micro) and there's not much of difference.
In fact, I'm surprised mine performed relatively better on certain days.
*
May i know the orientation, facing which direction? Mine same design as yours but unfortunately facing north east ( 45 deg azimuth ) instead of facing south

This post has been edited by backspace66: Jul 8 2025, 10:08 AM
backspace66
post Jul 8 2025, 12:23 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(I-Kurosaki @ Jul 8 2025, 10:13 AM)
Houses here are typical N-S orientation. My house is facing south.
*
Meaning your roof is tilted towards north, similar to my case
backspace66
post Jul 10 2025, 08:09 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(mudz_amin @ Jul 8 2025, 09:02 PM)
user posted image
user posted image

my solar setup never reach full capacity. i wonder what can be improved
*
Wow, is it enough to cover your whole consumption?

Rare to see such setup with kwp/kwac of 1.5. Based on your previous post it is 18 kwp and 12 kwac

This post has been edited by backspace66: Jul 10 2025, 08:10 AM
backspace66
post Jul 12 2025, 01:31 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


Based on TNB calculator for NEM even if your import exceed 1500 kwh but your export is below 1500kwh , the export willl be calculated at the same rate of the import ( 10 cents higher) . This is good news indeed and i will cancel my GET immediately
backspace66
post Jul 13 2025, 07:20 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


Based on new way of calculation

1700 kwh, 1300 max household usage and 400 kwh ev

Without solar: RM 999 , 1700 kwh
With solar : RM 360 (bill) + RM 300 (rent to own) , 1400 kwh import and 700 kwh export



In colder month, 1100 max usage and 400 kwh ev
Without solar: RM 720
With solar: RM 400 (bill) + RM 300 ( rent to own), 1300 kwh import and only 500 kwh export

I am using 10 kwp system and underestimating my solar panel generation to ( 1000 kwh best case and 700 kwh worst case)


This post has been edited by backspace66: Jul 13 2025, 07:31 AM
backspace66
post Jul 17 2025, 11:45 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


Anyone has any idea regarding load balancing feature of 3 phase inverter? Does it actually work well or just a marketing gimmick?

The reason i am asking is to try to optimize self consumption in a 3 phase system, i also made a mistake of not testing the self consumption setting before i got the welcome letter

This post has been edited by backspace66: Jul 17 2025, 11:48 AM
backspace66
post Jul 19 2025, 11:00 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


according to pvwatts and a lot of other calculator online, the difference is negligible for either case (facing south or north) since my roof only has a tilt of 15 degrees, only 2% difference in a year

Facing south is better in our region but this is base on a conventional roof design. Negligible difference for almost flat roof
backspace66
post Jul 20 2025, 10:33 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


Really kesian to sols energy subscriber, only one that can still have a meaningful saving is the user who exceed 1500 kwh per month

Although in a way, the subscription is a hedging strategy. You cant blame the company when the tariff goes the other way.

I am a bit suprised about people subscribing to this considering there is rent to own option from other company with fix monthly payment
backspace66
post Jul 23 2025, 11:02 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(stevenlee @ Jul 23 2025, 09:36 AM)
last time i checked, string can install directly without converter but micro need a converter..
both still need professional to help you install.
if you hv EV car, then you can save battery money by using EV car as battery..
there is a converter for this purpose  laugh.gif
*
Most VTL is capped at only 3 KW, but can use if there is power outage, good enough to power the portable AC
backspace66
post Aug 3 2025, 03:00 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(saiga @ Aug 3 2025, 01:19 PM)
600kWh only 250++ per month la. Where got kena slaughter? For average Malaysian home you will only hit this number if you have aircond running every day and from night to morning. If only few hours per day and using Inverter aircond will be around 150++.

To reach 1000kWh, you need aircond running both day and night lol.
*
I stay in apartment before, hard to reach 500 kwh. After moving to landed house, shoot up to 1000 to 1200 kwh, after buying EV , exceeded the 1500 kwh mark

Lucky i am able to get NEM 3.0, this allows me to import less than 1500 kwh now.

This post has been edited by backspace66: Aug 3 2025, 03:01 PM
backspace66
post Aug 4 2025, 09:49 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(dexeric @ Aug 4 2025, 09:16 AM)
user posted image

Hey guys, how do they calculate this? It seems so wrong.
*
You are only charged on KWTB, 1.6%. Your export probably exceeded your import, but export for purpose of calculation is capped at import value

You also managed to avoid other fee by staying below 600 kwh import but the main point is there is no negative bill anymore even if you export more than you import

This post has been edited by backspace66: Aug 4 2025, 09:58 AM
backspace66
post Aug 5 2025, 12:05 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


Anyone still haven't the latest bill? My billing period is 1st to 31 st July and i can see a lot of people already posting their latest bill in the group

This post has been edited by backspace66: Aug 5 2025, 12:05 PM
backspace66
post Aug 6 2025, 07:39 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


New bill (higher by rm 15 because of useless GET, i will cancel it soon)

user posted image

Actual consumption and generation
user posted image

If no solar
user posted image

Payment for rent to own, RM 300

This post has been edited by backspace66: Aug 6 2025, 07:42 AM
backspace66
post Aug 7 2025, 03:04 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(skywardsword @ Aug 7 2025, 02:51 PM)
To further inform. For the three phase inverters. 10kw peak solar production.... Each phase only gets 3.3kw. therefore when single phase EV chargers... Only get 3.3kw of selco.
I also limit my 7kw charger to 4-5kw.
*
Not true for all 3 phase inverter. My inverter has a balancing feature that prioritize self consumption

user posted image

Different output for all 3 phases

Phase A highest because turning on the 3 hp AC in the living hall,phase B for second floor and nothing is turn on, phase C for kitchen , dining hall and laundry

This post has been edited by backspace66: Aug 7 2025, 03:16 PM
backspace66
post Aug 29 2025, 09:29 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


Anyone knows how long it would take for NEM user to change to ToU if applied from website

This post has been edited by backspace66: Aug 29 2025, 09:29 AM
backspace66
post Aug 29 2025, 01:18 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(dannychen @ Aug 29 2025, 12:25 PM)
was 10 days for me to apply by email. they called twice for verifications. online should be faster as it will generate application number on the spot.
*
Thanks man, i was trying to avoid the 8% sst on the larger amount so i wait to apply until the 29th days of my billing cycle, if it is this late, i guess i will be charged anyway for next month cycle
backspace66
post Aug 30 2025, 04:55 PM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(dannychen @ Aug 29 2025, 04:23 PM)
anyhow you will kena prorated bill which is confusing. it takes time because of last bill reading, site visit etc.
*
Just received an update from mytnb app informing the ToU application is completed. Only 1.5 days required

This post has been edited by backspace66: Aug 30 2025, 04:56 PM
backspace66
post Sep 3 2025, 03:15 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(coconutzz @ Sep 2 2025, 07:58 PM)
Just got my bill :

August (TOU) : RM364
July (Non TOU: RM247

Usage for both and Solar generation almost the same.

I wonder if the bill is wrong? Any one can guide me thru and "My penjanaan in the bill is 0"

Weird
*
Check ToU welcome letter, due to tnb staff not properly trained, they accidentally key in zero export in the system

This post has been edited by backspace66: Sep 3 2025, 03:17 AM
backspace66
post Sep 3 2025, 09:51 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(Cavino @ Sep 3 2025, 08:43 AM)
If they keep the current NEM deduction calculation, it is still feasible to go ToU for solar users coz technically they deduct the peak usage first regardless of when it is exported. During the holidays and weekends, usage is all in off peak rate (weekend day usage with multiple air-conds on hot day is pretty high for me).

However if they change to Peak Export can only be use for Peak Import and Off Peak export can only be use for Off Peak Import. Peak Export cannot be contra off for Off Peak Import that is initially rumoured (actually stated somewhere in TnB faq then), then ToU is not only not worth it, it might also be detrimental for NEM user to subscribe to ToU.

This is because most of our generation will likely be during Peak Period with peak usage contra off from direct solar generation. So with most of our solar generation exports accumulated during Peak Period, if cannot be use for off-peak usage where most household usage especially night air-cond users is in at night till morning, solar users will not only not benefit from ToU, it will be likely be a major loss where off peak import adds up with peak export sitting there and yet cannot contra them off. May as well stay with standard rates where all exports can be use for all imports.

So hopefully they keep to current calculation for NEM deduction aka deduct 100% Peak Import first then only follow by Off Peak Import deduction regardless of when it is exported.
However for my calculation in previous post, it will not be much but can still save up to 2 cups of starbuck in 1 year for me...haha.

But if they implemented the peak export can be use only for peak import, then I will be discontinuing ToU.
*
You are right , in simple term

If peak usage < export

All peak usage will be offset by export

And 8% SST is now charged on a smaller amount due to low ToU tariff and obviously will be cheaper, based on TNB own calculator i am expected to save RM15 per month just by a few click applying online

backspace66
post Sep 3 2025, 11:34 AM

Look at all my stars!!
*******
Senior Member
2,139 posts

Joined: Nov 2007


QUOTE(bee88 @ Sep 3 2025, 11:17 AM)
This is what I worry about.  Or maybe in the future it’s just value based.  Like u generate 1000kwh peak at 28 cent and 1000kwh at off peak 24 cent. Total credit u get is 280 ringgit and 240 ringgit.  Rm520 ringgit.  Then this rm 520 is used to offset the value of the peak and off peak usage (also value).

This will devalue ur generation.
*
What is the problem then? When the time comes, changed back to normal NEM and pay the rm10 charge, you only need to click a button and upload ic in the website

4 Pages < 1 2 3 4 >Top
 

Change to:
| Lo-Fi Version
0.0249sec    0.56    7 queries    GZIP Disabled
Time is now: 9th December 2025 - 09:39 PM