A couple questions to finish our system.

[sunshine_eggo]

Thanks for your willingness to help.

We're trying to learn and get it figured out.

Would 2 more batteries make a worthwhile difference?

Two more batteries would double the capacity to 5.12kWh.

Important concepts:

1. Your PV array size and available solar determine how much you can use daily.
2. Your battery capacity determines how long you can go between charges.

If you want to power items via solar indefinitely, their daily energy consumption must not exceed your array's daily harvest. As you can see, this varies seasonally. In the example I provided, you would not want to count on more than 2.21kWh/day due to the lower energy harvest during winter UNLESS you plan to supplement with grid when needed. Adding more batteries won't help with this. More batteries will help you get more run time between charges.

Recommend you hit the pause button and:

1. Get a kill-a-watt or equivalent meter to measure the consumption of the devices you wish to power.
2. Determine your array performance based on your array orientation, tilt and available solar.

 

[GaryinWV]

Off to hunt a meter.

Close to Charleston, WV.
South exposure. Mounted on garage roof. Very little, if any, obstruction.

Thank again.

 

[sunshine_eggo]

Off to hunt a meter.

Close to Charleston, WV.
South exposure. Mounted on garage roof. Very little, if any, obstruction.

Thank again.

A little shading early or late in the day robs you of very little. Partial shading can be a killer. Pitch of your garage roof matters. If less than your 38° latitude, it will further skew production - more in the summer and even less in the winter.

Roof Pitch and Roof Angle (Degrees)

Convert roof pitch to degrees

pveducation.com

Note also that if code compliance matters to you, it's highly unlikely your system meets code depending on which NEC code your Authority Having Jurisdiction (AHJ) uses.

 

[GaryinWV]

Will check pitch tomorrow.

Thanks.