ddxv
New Member
59 volts is 2.46 volts per cell which is way high for lead acid. You shouldn't need to go that high. I'd recommend you stay at 2.4 volts per cell or less (57.6 volts). High voltages lead to out gassing. Lead acid will equalize with long term float charging at about 2.30 volts per cell.
The "60 volt" limit is a general limit for "safe" low voltages. This is why Power over Ethernet stops at 57 volts, for example, and why you don't see 96 volt inverter battery systems (once you go that high, might as well be ~400 volts for efficiency).
Mike C.
Dunno, as both the current and previous lead acid 48v battery systems (Trojan and Rolls) had that high of charging and of course higher equalizing. I made a specific thread about that with some documentation of the Trojan and Rolls manuals:
Previously I thought the issue was just some settings, but after calling Signature Solar they told me that 59v is a hard limit set by NEC standards.
This causes an issue because the 48v lead acid battery manufacturer states the default absorb charge should be 60 and more importantly the equalize is 63v.
59v is ok for the charge, but it seems we've lost the ability to equalize our battery bank.
Does this sound correct? Is the work around to look into changing battery bank to 24v?
I get the feeling EG4 is not very compatible with lead acid batteries.
This causes an issue because the 48v lead acid battery manufacturer states the default absorb charge should be 60 and more importantly the equalize is 63v.
59v is ok for the charge, but it seems we've lost the ability to equalize our battery bank.
Does this sound correct? Is the work around to look into changing battery bank to 24v?
I get the feeling EG4 is not very compatible with lead acid batteries.
- ddxv
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- Forum: Off-grid Inverters