EG4 Initial Battery Charging

[Rafagus]

I got my new system in, two 3K controllers and three EG4 batteries, and it includes a separate battery charger that I was told is for the initial setup. I think I'm to fully charge each of my three batteries one at a time prior to commissioning the system. I just want to make sure I've got the one at a time piece correct?

Thanks!

 

[LithiumCowboy]

Yes definitely charge each one individually to 100% SOC. This will ensure each battery is top balanced whenever you install all 3 into a bank together. After you build your battery bank. Turn on the batteries while all connected together in parallel and let them idle all together for a few hours, this will equalize the capacity of the entire bank and also passive balance the cells in all 3 batteries giving you the most balanced bank. Every time you charge back up this bank go to 100% SOC every time if possible.

 

[DIYrich]

When you charge each battery separately, after you hit 100%, keep charging for at least a few hours to top balance the individual cells in the battery.

 

[timselectric]

You can charge them separately or together.
The important thing is that they are close to the same voltage when you connect them in parallel.