Tying solar to existing 12v/120 wiring

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It's likely a benefit to connect the 12v circuit - except the inverter - to the load terminal on the MPPT. How much max you are likely to pull is a factor as is the methodology the charger uses to control its charge state. The one's where it is a benefit to connect to the charger load terminal are the best as this separates the load voltages from the charge state of the battery for better battery management.

Do you have pre-wired 12v circuits/outlets?
 

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