HELP PLEASE

JAGA II

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Joined
May 25, 2020
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wholybee

Solar Addict
Joined
Feb 11, 2021
Messages
465
Maybe you have the 80A and 250A breakers swapped? 80A is small for an engine start, and 250A is large for solar.
Using an isolator instead of a DCDC charger will overcharge and damage the start battery. Reason, you will be charging the LFP to about 14.5V, and will probably have an absorption stage at that voltage for a bit. The start battery will be subjected to that charging as will, even if it is already fully charged. It would be better to get a DCDC charger, and use that to charge the start battery.
The inverter needs a fuse. As will any loads that aren't on that drawing yet.
Understand, the SOK monitor is not for reading voltage, but to calculate and display state of charge as a percentage. Voltage is useless for determining state of charge with LFP. % SOC is easier and more friendly.
 
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