Adding 2nd Battery

[threepets]

I am new at Solar, and just last month flicked the ON switch for the first time on a Solar set up. My system is the MPP LV6548 , 4 - 460W Bifacial Panels and ONE 51.2V 100 Ah 5.12KWh LiFePO4 Battery. I have a question ... After 4 weeks I am now adding a second identical New Battery. How do I introduce this Battery to my System without causing any damage?


Adding a couple of pictures displaying how I take advantage of my 4 - 460W Bifacial panels and what I am trying to do , nothing to do with the question but any constructive criticism would be greatly appreciated.

The Wagon is 4 wheel steer , the Panels weight 52lbs each, span 13'4" on a n 8ft platform, one person can move it around easily. I have 200ft of 8 gauge PV Cable. When the Panels are in front of the Garage in direct Sun light the production (at that angle which can be changed but is very difficult to change ) is very close to 100% unfortunately for a very limited time. Quite exciting actually ,novelty hasn't worn off yet.

 

[BentleyJ]

Nice mobile set up so you can change positions as needed. Could get interesting in high winds though.

This seems to be the day for questions about adding battery storage to existing systems.
The most important part is to have the resting voltage of both batteries within 0.2V of each other so there is not a large current surge between them.
Secondarily its helpful, but not required, that they be at the same state of charge. Ideally, fully charge both batteries independently then let them sit for a while to reach the resting voltage which should be very close to the same. If you don't have time for this, no worries, the low battery will eventually catch up during the next charging cycle provided the absorption time is long enough.

 

[threepets]

Nice mobile set up so you can change positions as needed. Could get interesting in high winds though.

This seems to be the day for questions about adding battery storage to existing systems.
The most important part is to have the resting voltage of both batteries within 0.2V of each other so there is not a large current surge between them.
Secondarily its helpful, but not required, that they be at the same state of charge. Ideally, fully charge both batteries independently then let them sit for a while to reach the resting voltage which should be very close to the same. If you don't have time for this, no worries, the low battery will eventually catch up during the next charging cycle provided the absorption time is long enough.

It Fits right in the Garage ,have already had to deal with the wind.