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Liam, CC usually wired the house La bank as two banks wired in parallel, each service by an inverter/charger and via one of the 00 wires running from the alternator. Both 00 lines normally terminated behind the black panel between the inverter/chargers on the same fused post. The gen “boost” wires picked up there, went to a “boost solenoid” and then on to the generator La start battery.
To replace the La house banks with Li you need to add one or more BtoB chargers and disconnect that “boost” wiring so the Li batteries never come together with the La batteries except vis the BtoB charger. Easy to do on most CC setups.
Jerry