I have a 12000XP with two indoor batteries and no solar. AC Charge Battery Current(A) is set to 40A. The system is used as a battery backup with grid pass through normally powering the load. I would expect a much high charge rate.
SOC 66%
From grid: 2744w
To batteries: 2118w
Load: 454w
I think I just found my answer but would like confirmation. AC Charge Battery Current(A) set to 40A is 40A @ battery voltage and not 240v.
Wow glad I stumbled in on this discussion. I do not think many will read the documents will think this is what it means. Now the recommended range (60a-140a) from the indoor battery spec makes sense with this context. So with the eg4 indoor battery recommendation is charge the 51.2v batteries at 3000watts with 60a and 7168watts at 140a.
Wow glad I stumbled in on this discussion. I do not think many will read the documents will think this is what it means. Now the recommended range (60a-140a) from the indoor battery spec makes sense with this context. So with the eg4 indoor battery recommendation is charge the 51.2v batteries at 3000watts with 60a and 7168watts at 140a.
For calculating charging power it's better to use a nominal charging voltage of 56VDC, so charging power at 60A and 140A would be 3,360 watts and 7,840 watts, respectively. For calculating discharge power I use the nominal battery voltage of 51.2VDC as you're doing.
Personally, I prefer to stick to a charging rate of 0.25C or lower to limit the stress on my battery bank. This would be 70A DC for the indoor units.
Thank you, I've updated my configuration spreadsheet with this new to me information. My system has not shipped yet so I do not have direct access to the menu but I thought I read that Discharge Current Limit applied to lead-acid battery mode only?
