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diy solar

diy solar

Help planning system for home

jorge89

New Member
Joined
Dec 27, 2024
Messages
2
Location
Orem UT
Hello,

I'm doing research do that I can diy a solar system for my home. I came across this page, but then realized that the inverter used there was for an off grid system. So then I found the EG4 18kPV Hybrid Inverter which can connect to the grid. I'm also thinking I'll get an EG4 PowerPro WallMount AllWeather Lithium Battery. What I'm currently looking for is a complete list of every component I'll need that'll work with a system that uses a hybrid inverter and also a diagram for all the wiring involved.

The 18k has a maximum PV input voltage of 1000V and a maximum PV input current of 30A per MPPT tracker, and it has 2. The solar panels I'm looking at are 385 Watt, 10.28 amps. Would having 2 strings of 15 panels each be too much? I understand the open circuit voltage increases in cold temperatures and I live in Utah where we usually hit 0 degrees Fahrenheit in the winter. Would that be safe or would I have to either get another inverter or do less panels?

Thanks in advance.
 
Not sure where you're getting 1000V. IIRC, residential installs are limited to 600V.


View attachment 266011

This might get you started:

I just Googled it, but it looks like Google got it wrong. So if the 18K actually has 3 MPPTs then 3 strings at 485 volts would be safe?
 
Start with your panel requirements and roof layout. Then you can figure out how many different strings.

I belive the 18kpv has two inputs per mppt, so you can parallel identical strings at the inverter (up to 6 strings).

If you need more strings, there are different ways to handle that, depending upon your situation.
 

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