Ha ha... you were looking at the commercial unit, residential should be much lesser amp.

You can use this watt meter. It is for DC circuit. It show watt, kwh, A, voltage, peak volt/watt/A. A very usefull to monitor the uasage. Specially for solar.



Another usefull instrument is this multimeter. A must for electrical.



UPS have capacity size. Depend your requirement usage. It actually is the inverter size. Battery size in the UPS is for how long it can backup.

Hi Ozak,

Have your grid tie inverter gives you any problem?
I'm interested in getting one, but worry about its reliability & safety.

No problem. I have 12v and 24v. 24v give higher yield. Have run for more than 6 month.

But I stop using now. As it bit boring for just return back to grid.  Now running off grid.

Have plan to redesign to combine the off grid and grid together.

Thanks for your feedback.

Btw, what kind of battery you are using for your off grid system? SLA?

Using 2 X 65Ah SLA battery.

Joint in series for 24v.

One question, i am planing to build a solar+battery powered raspberry pi cctv, and need a solar charger controller. I saw most controller have this output with "bulb" indicator. Is that a DC output? Eg below

https://www.lelong.com.my/20a-12v-24v-solar...7-01-Sale-I.htm

Yup. That is the output from solar or battery. 12v or 24v output depend on your solar and battery connection.

Either manual on/off by press that key button or preprogram output like day OFF/ Night ON, timer ON/OFF etc. Select the mode by keep press the key button.

Need to calculate carefully the solar and battery watt for 24hr running.

Ok, that output is set-able, will need to run 24x7 for my rapsberry +camera. Will about 7watt include loss.

So small the watt?

Thought the camera will use more than 5w.

http://raspi.tv/2016/raspberry-pi-zero-1-3...age-with-camera

Best things for Raspberry pi camera, it have a version for low light infra red camera (noir)

https://www.youtube.com/watch?v=lP-QQGxm2Y0

Maybe couple of hundred mAmp to power the infrared LED.

Put it at 10w x 24hr = 240whr

Require 51ahr, 12v battery.

If 4hr of sunlight (raining) you need 78w panel.

Get a 65ah, 12v battery, 100w panel and 10A charger controller.

No problem. I have 12v and 24v. 24v give higher yield. Have run for more than 6 month.

But I stop using now. As it bit boring for just return back to grid.  Now running off grid.

Have plan to redesign to combine the off grid and grid together.

is this part of your system which you wanted to use standing seam roof?

how many KW panels?

will try small scale first, maybe 2x 7ah 12v seal lead acid for the 12 hours night, while day will use 30watt solar panel charge and supply the pi. Will try it for RnD purpose.

This panel is already on the roof. It is the fix panel type.

Have another 6pcs which require the seam roof as backbone. Leceh abit to install. 

This type --> https://forum.lowyat.net/index.php?showtopi...post&p=60668821

yeah putting solar on tiled roof memang leceh, need to consider the water proof aspect also.

thx for the thread, but why did you say your system is on-grid when you didnt sell any power back to tnb?

Not official sell back.

You can plug in the inverter and sell back. But at lower cost.

Or more correct way, reduce your power consumption.

ok basically (solar assisted power generation within your house)    (not on grid, cos u dont send back anything to the grid)