October 24, 20214 yr I have 4x 100ah AGM Batteries (mainly to get though loadshedding), grid tied. I'm curious about the exact correct settings to charge on my Deye 5K and what voltage I should consider "empty, do not cross" Typical loadshedding at night brings battery percentage down to about 86% / 49V after 2 hours Does it make a big difference how fast this type of battery charges?
October 24, 20214 yr The charge current should preferably not exceed 0,2C (20A for a 100Ah battery).The temperature of a battery will increase by more than 10°C if the charge current exceeds 0,2C
October 25, 20214 yr 6 hours ago, Atmosphere said: what voltage I should consider "empty, do not cross" I would say 48.0V. With moderate discharging, that still leaves some capacity in the battery for reasonable life. That's for 20S (4S nominally 12 V modules) lead acid, basically any variation of lead acid. Edit: at very low to no load, I'd say 49.0 V (12.25 V per module). Edited October 25, 20214 yr by Coulomb
October 25, 20214 yr Author Thank you... So basically only change charge from 40 to 20 And then I should consider "86% / 49V" as pretty much 0% remaining
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