ON a NEW WFCO 8955, at what voltage should
the Bulk Rate charge kick in?
Forum Discussion
This is a bit complicated, so pay attention.
When the batteries are say at 50% SOC, they should be at a resting voltage of about 12.1 volts. As soon as you turn on a charger the voltage "spikes" to whatever. The spike has to be less than to 13.2 volts for the WFCO to decide to go into "Boost"
The spike will be higher if the battery is lower in AH compared with the amps size of the charger. You have a better chance that the spike will be lower if you have a 55 amp charger on four batteries at 50% than with two batteries at 50% and using 55 amps.
That is why smk is always saying to try a 35 amp charger on two batts instead of a 55 amper.
However, if you really want a proper fast charger, despite your only two batteries, you want to escape from that restriction, so a WFCO won't do.
PowerMax, Iota, and PD (but only with its Charge Wizard) will let you go ahead with the higher amp charge on the two batts at 50% and save a bunch of generator time to do "50-90"
When the batteries are say at 50% SOC, they should be at a resting voltage of about 12.1 volts. As soon as you turn on a charger the voltage "spikes" to whatever. The spike has to be less than to 13.2 volts for the WFCO to decide to go into "Boost"
The spike will be higher if the battery is lower in AH compared with the amps size of the charger. You have a better chance that the spike will be lower if you have a 55 amp charger on four batteries at 50% than with two batteries at 50% and using 55 amps.
That is why smk is always saying to try a 35 amp charger on two batts instead of a 55 amper.
However, if you really want a proper fast charger, despite your only two batteries, you want to escape from that restriction, so a WFCO won't do.
PowerMax, Iota, and PD (but only with its Charge Wizard) will let you go ahead with the higher amp charge on the two batts at 50% and save a bunch of generator time to do "50-90"
