Is May your highest yield with 766kwh? That is about 24.70kwh and 3.25 sun hour. 

I feel like ur system should have performed better.  Something wrong? At least 800 based on 30 days and average 3.5 sun hour.

Actually toward the end the supplier hinted to me they can install extra panel than allowed by TNB, under table stuff. I never ask further since not possible for my case.

I think the main point to be considered. Are u going to shift new house in the next 10-20 years? Is the upfront cost going to affect ur lifestyle. I definitely don't which the biggest reason i go all in for solar.
Hmm... why the need for battery when u already have NEM? How much the battery cost and how many panel? Can last for whole night?

What is the huawei inverter specs?

Are they undersizing it.

You mean your inverter is 9kwac? This spec pair with 7.6kwp seems unbelievable. 

Just heads up. You need to share the mode of the inverter.

Coz when you mention 9kwp inverter, I suspect you are getting the inverter that support up to 9kwp. But usually the kwac is around 6-7.

It’s best u can share the model. 

To be honest, if you roof has angles, should have gone for micro inverter. 

Yours come with optimizer?

So the idea of adding panel is actually pointless

And your yield is limited by the inverter. Not so much panel placement. 

Panel placement usually can’t do much because that’s something the roof you can’t simply change when u are using alll of it.

I hope your system comes with optimizer?

How do u check how many hours?

My neighbour same setting but generate 10% extra. I always assume because of roof angle. His conventional two slope. My roof a lot pattern with bug sun window in middle. So my solar arrange many different patch.

Corner lot should generate better yield. From what I see.  Unless sun come from left to right in the picture.

not sure what is better for the environment, use less electricity or install tons of solar panels to accommodate ones outrages energy usage for residentials.

two ways to look at it.

if u keep the money in epf, u still need to pay tnb bill right? say u withdraw money every month to pay 800 to TNB, how much of this 47k will be left after 4 years, or how many years the 47k totally depleted by using it to pay tnb bill?

if u use the 47k to install solar pv, say 800 tnb bill saving per month, what u can do is to invest the 800 into something that can give u 5.5% return, i dont think thats difficult to find such investment (say just buy maybank shares lah that give annual dividend 6 to 7%), in 4 years, u will get about 44k in investment, in 8 years, your investment value will be about 97k, while if the money still in epf, that 47k will increase to about 73k in 8 years, the gap will grow larger and larger

just saying, of course EPP even more beneficial as its 0% interest and the epf money still giving 5.5%

how many years EPP u r getting? what i heard max 4 years only

if 4 years EPP, your monthly installment will still be higher than your tnb bill and can only see net saving after 4 years

I stand corrected, I did not take into account that the electricity still need to be paid for EPF case.
Basically the moment once the gains from EPF cannot cover the electricity bill, you cannot rely on compounding value to beat solar case.

If you don't take invested fund to pay TNB as if you take from another source , it means the amount of capital used is higher , which means it no longer is 47k but 47k + extra money to pay TNB bill.

I'm trying to make it apple and apples as much as possible, you have 47K money and 9.4k electricity expense every year. Which would come up at the top?

Remember your sheet shows after 10 years you cant sell back because nem contract is over (not sure if government will continue or extend confirm have to reapply).
Take note - ppl who did their homework abt NEM solar already know after 10 years they buy batteries and store access energy for night use. This will also consider as saving already but upfront cost would be battery .

Currently estimate price for 5kwh = RM5k-6k (can get cheaper , battery and solar prices keeps dropping).

Average we need at least 10kwh per house depending on lood/usage.

Ya you’re right.
I did more simulations with TNB calculator. Doesn’t matter below 600kWh or above.
EEI will get less and less but they offset your EEI based on import - export.

Meaning… if 1000kWh, you get -RM0.005 / kWh but only they calculate based on the net (import - export).

So as you go higher in kWh each extra kWh will only get more expensive, they give you less rebate based on net import… funny method of doing this EEI. Just a bad overall for NEM user and penalize NEM if usage exceed their export quantity.

Best is as Bee88 mention where to make sure is net 0. Then no bill changes.

In and out 650 where got excess credit?

Or u mean negative tnb bill after applying EEI?

Doesn't make sense if NEM users are not qualified for EEI. Not all NEM users are with heavy consumptions.

My gut feel is that the 'formula' was in place to prevent negative bill calculation. For instance, those under 600kwh and with net import-export. TNB would have to 'pay' them with EEI as reward based on new tariff, which again doesn't make sense.

TNB need to fine-tune how the EEI adjustment is calculated.

Actually it’s like this. 

The incentive is for users who use less. Let’s say u use 600kwh. Each kWh is 50 cent.  (For the sake of calculation)  And ur eei entitlement is 10 cent per kWh. (For the sake of easy calculation ) that means u get 60 ringgit off from ur 300 ringgit.

That means lah. Actual price is 40 cent per kWh right. ?

And so coincidence u have NEM, u suppose to offset 50 cent right?  And let’s say ur generation is 600kwh. Ngam ngam. So u suppose to get offset 300 ringgit right? But this will cause Tnb to be at a loss. They charge u 40 cent per kWh after the eei incentive, and suddenly u want them to pay u 50 cent for each kWh u generated. Hence the pelarasan of 10 cent per unit for 600kwh generated.  Which is rm60.
But in another month, let’s say u generate 500 units only.  And use 600 kWh.

So Tnb still charge u 600 units at 50 cent, and offer 10 cent back as eei, which effectively make it 40 cent per unit.  Which is rm240 in total. (Eei is worth rm60)

And since u only generate 500 kWh unit this month, if based on 50 cent rate, Tnb should deduct rm250, but since  u only need to pay Tnb rm240, so this will make Tnb rugi rm10. So to avoid This, the 500 units that suppose to be used to offset should not be in 50 cent, it should be only 40 cent.  And u will only get 200 ringgit worth of offset.  And need to still pay rm40. (240-200).( Pelarasan eei is rm50)

In this month, u get only 10 cent for eei for the 100 units which is not offset due to not enough generation. (600-500)
(Your actual eei is rm10)

Hopefully it’s clear to understand.

U where got nett import. U nett zero.