I have tested the voltage of each of the 3 banks and the voltages are 13.11, 13.19 and 13.2V. I disconnected the parallel cables and the voltage of each individual battery is identical to that of the bank it belongs to so it appears that the voltage …

I have been wondering for some time if the "don't discharge your batteries beyond 50%" rule really applies to AGM batteries. AGM batteries claim to be deep discharge, and 50% discharge doesn't seem very deep to me! So I did a little research...If you look at the data for Odyssey AGM batteries, you find that they are good for 630 discharges to 50% but only 400 …

2022年5月30日 · Victoria, that article was excellent! That is actually my exact battery pictured on the right. (Feeling silly for not doing that Google search myself , thanks for digging that up). I took a screenshot of the chart, to keep it for myself: So it, seems like the spread of the chart is greater for the AGM. Dropping around 0.25 initially per 10% ...

Otherwise voltage values can fluctuate based on whether the battery is being charged or discharged. Here is a chart from MK Battery showing different levels of charge for flooded lead-acid and sealed batteries – open circuit voltage. Comparison of Battery State-of-Chart to Open Circuit Voltage for 12-Volt Batteries

Looking a SOC chart for the AGM's I chose these settings: Low battery shutdown - 23.5v (~35%) Reconnect and alarm - 23.9v (~40%) Charge detect - - - - 24.2v (~55%) For Victron, if LOBCO is triggered 3 times in a row, the inverter will remain off until this voltage is reached, it will then wake up and resume inverting.

Re: Help with 48V AGM battery bank Victron should tell you the ratings for the fuse/breakers. But, the math I start with: 4,500 watts * 1/42 volt battery cutoff voltage * 1/0.85 inverter eff = 126 Amps; 126 Amps * 1.25 NEC safety factor = 158 amps minimum circuit

Re: charging AGM batteries in cold climates you could, but temperature compensation of the voltage needs to be there. a cold battery will need a higher voltage and just how much should be in the battery specs for your particular battery. once charging starts it will start to warm the battery up and the temp compensation will change as it goes up. you could also drain a bit of the …

This is for battery temperature (not ambient temperature) and is useful for battery temperatures from 0°C (32°F) to 40°C (104°F). note that most eq charges are for an hour or 2, but individually charging the batteries or rearanging them in the bank helps. no agm likes excessive charge voltage applied to them as it causes them to outgas and ...

A simple resistive load draw more current at 12.8 volts vs 10.5 volt battery bus test (constant resistance load) Then there are very nice constant current testers--Basically electronic loads that adjust current draw to maintain set current with variable …

I agree with Vic--Typical AGM charging voltage for ~75F, is (14.4 volts * 2 batteries = ) 57.6 volts. When the battery charging current falls (below ~1% to 0.1% rate of charge -- i.e., 800 AH battery bank * 0.01 = 8 amps) or lower--Then they are usually fully charged. 54.2 volts / 4 = 13.55 volts--That is a typical range for float charging (after bulk/absorb charging has been completed).