A 50w panel can generate 50w of power in 1hr. So if you expose the panel in whole day, it can generate 50Wx 5hr=250whr of power. But this is just a theory calculation. Not yet minus some bad thing.

You need to know your device usage. Than you can know the panel can support or not. Let say your device suck 20w and you want to use 10hr. That is 20wx10hr=200whr. So it is under 250whr panel. Your device are good to go.

For battery is a bit complicated.

For on-grid, you need get a approving installer. Can't DIY. Just only the document, can kill you.

I understand this calculation. But this is just a theory.

Want the actual annual profit. What is the percentage like. I dumb RM100k in, what annual income I get. 4%, 5% ?

Cause I tried connectting the 18v 50w panel directly to a 12v 0.8A DC fan but it won't run. Need to connect through a battery only can. Is this because of the amps? The out of the panel measures 18++V.

Also for this, does it mean my fan takes 12x0.8=9.6whr?

Its not a theory. Many (incl me) are earning it. Happily earning it.  Even more happy that other think that we get only mid single digit so we have more chance to apply for FIT quota.

The one who did not apply are paying those who applied !

Your fan is only require 9.6w. If you run for 1hr,  it only consume 9.6wx1hr=9.6whr. Your panel supply more than enough power. The problem is the voltage. 18v is too high for the fan. Any possibility burn down the fan.

You need a charge controller to regulate the voltage down to 12v. The charge controller also  can use for charge the battery.

I still don't get a number from you. I know you are happy. Buy what is the figure?

I try to use less than rm77/mth from avoid paying the 1%. For you guys. So far so good

Bro, KWTBB no longer 1%, it is now 1.6% if exceed 300units.
But for March, April and May, 2015, try to submit 301 units  in order to qualify for ICPT rebate.
Example:
300 units = you pay RM77
301 units = you pay RM71 (inclusive of KWTBB)
ICPT rebate 3 months only.

For those who don't understand what is KWTBB. It stand for Kumpulan Wang Tenaga Boleh Baharu.
https://ms-my.facebook.com/kwtbb

Why there is no announcement? This is Day light robbery already. Nobody aware of it.

I hardly use exceed rm70 nowadays. Pass 6mth, max rm65.

ICPT here:
http://www.tnb.com.my/announcement/2015/02...march-2015.html
Rebate of 2.25 sen/kWh effective from 1 March 2015 until 30 June 2015. This rebate will be applicable to all customers except Domestic customers with monthly consumption of 300kWh and below.

KWTBB increased from 1% to 1.6% since 1st January 2104. I think you submitted your meter reading below 300 units that's why you don't have to pay KWTBB and never realise the increase. 

Ya, what I mean is, shouldn't the fan run directly from the panel since it's 18v? Mine doesn't run at all. It moves when you connect but that's all. Is it because of the lack of amps? How much amps does a 50w produce? 50w/18v =2.77A?

Anyone using off grid systems? how do you maximize a solar panel? be it 10w or 50w?

Read back previous post.

I reach page 10 already cannot tahan. any tips?

i was very interested especially when chokia started inquiring but the costs is too much.  am i wrong?

Too much poison is it?

50w panel what you want maximize? Can generate 100w from 50w?

I mean I have a 50w panel, a charge controller, a car battery.
So far I can charge all my usb devices daily.

I'm trying to reduce RM 10 of my TNB bill. Is this possible?

I mean I have a 50w panel, a charge controller, a car battery.
So far I can charge all my usb devices daily.

I'm trying to reduce RM 10 of my TNB bill. Is this possible?

You can do a calculation.

50w expose 5hr a day, 50wx5hr=250whr. 1mth output is 250whrx365day/12=7.6kwh/mth.

Given the TNB rate is 0.218sen/kwh. So 7.6kwh x 0.218sen = RM1.65/mth can be reduce.

Is it possible?