The panel look small.

Why not connect all the panel?

You can wire out for optional use later. If no use, can combine and produce more. Place a switch to switch over.

Meter got terbalik run ?

The inverter max can handle 20 panels only.
Extra 8 panel I pull wire down to ceiling then only think what to do with it later...

I am not doing NET metering...
Btw right after finish everything then start raining.

This morning 7am leaving the house to office I already notice got some power coming from the panel already. 2w worth...

Haven't finish the data link from charger/inverter to pc for data collection yet, many things to do...

Hi.
Interesting project you have there.
Your project setup appears to be non grid tied, correct? ie your DC solar wiring (ie Panels to MPPT), DC wires from batteries to AC inverter and your AC wiring from inverter to your electrical appliances are separate from your original home AC wiring right?
Nice project

Yes, I select the load I want to power with solar then move them into another DB.
Easier to debug if got issues too.

Hi thanks for the replies.
Forgot to mention the following question.
For the solar DC cable what are the unit rate/mtr u guys think is reasonable or whats your budget like?

Experts will answer your question better. In the mean time from what i know for DC wiring theres significant loss of energy the further the distance from panel to MPPT. Energy lost as heat / fire hazard. To offset energy lost, need thicker cable. Problem is the thick cables are expensive.
If grid tied, then can consider use microinverter. This changes DC from panel to AC at or very near the panel itself. AC energy less lost with distance and doesnt require thick cable. Also each panel with microinverter is independantly producing energy if you have more than one esp if your panels are connected in series only. Unfortunaltely it is expensive if you have large number of panels.

boss,can share how much is your saving and cost?

Thinking of putting solar panel to my roof to offset electricity cost, this month bill went over the roof d

No idea on the savings yet. Need to wait for TNB bill for a few months to get average billing numbers.
Well, base on my rough calculation, should be able to save 30% from my current tnb bill.

This post has been edited by yushin: Mar 26 2019, 11:18 PM

whats your estimated cost? So far i see figures thrown around like 20k-40k

The numbers will differ on what type power,battery storage, or net metering...
What you want to do with the solar?

Thinking of NEM since FIT no longer available right

I got 3 house side by side so can use their combine roof to offset the highest electrical consumption. Per month my bill is about 400-500 so if 25k and bills got cut into half still will ROI in 5-6 years, Not bad i think

You need to ask NEM contractor to see its aloowed or not to use more than 4kw of panels.
To use NEM there are many rules to follow.

Mine is consider grid-tied no sellback type so I have more freedom to configure the solar system.
Btw if you are doing NEM I think you can save the cost of the batteries which is quite substantial.

Better you contact NEM contractors and ask their opinion.

The idea is to ramp up the DC voltage output by connecting solar panels in serial, the higher the voltage, the smaller the current, then you can use smaller cable size

Microinverter is also another way to reduce the cable size.

i see you were using your own installer,does he have any experience with NEM?

What is that "unit rate/mtr" ?

AC or DC voltage will drop when the wire is too long. It is because the wire has resistance (ohm law). To overcome such problem, the wire has to be thick. Why DC voltage is more concern? It is because DC voltage is smaller compared to AC. A small percentage drop will have cause a lot at the end of the output.

Solar Panel or whatever power supply is only produced 12V, 24V, 48V DC. While TNB is supplying 240V AC. So AC can have longer wire before its voltage drop.

Carry higher current is also require a thicker cable. Even it meet the voltage drop minimum.

Microinverter is not cost efficiency as every panel require 1pcs. Unless the price is cheap enough. Unless you live in a castle, running a thicker wire is still cheaper.

You also can joint the panel is series to increase the voltage to run a thinner wire. But subject to the inverter max input voltage. It is also dangerous to have high DC voltage. I would rather have a thicker wire.

NEM or anything will not offset your high consumption.

You pay a high price product to reduce your low rate usage. How to offset? NEM is different from FIT. The more your consumption, the lower you get paid.

Learn how to save electricity is the only way. Before thinking about solar generation.

Actually I am thinking, for NEM, what if you sell more than you use? TNB pay you back money?

For NEM, Power generate you use 1st. Extra power only sell out. TNB will pay how much you generate out to them.

For FIT, 100% generate will sell to TNB. No connection to your house line before the meter.

Aka, you get less for NEM compare FIT.

a company quoted me a 6kwp for about 30k. ROI in 6 1/2 years

What you think of it?