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Scenario
I have a 175ah Lithium battery powered by solar via Victron MPPT
I want this unit to charge a spare 120ah Lithium battery I have
If I use a Dc-Dc Smart charger with isolation 12/12v - 18a would be plenty, will it work and what would be the L H Pinouts.
I live down under plenty of sun and the solar keeps the 175ah topped up most days
If you want it on 24*7, L and H should be bridged as it is from the factory.
Using engine detection allows you to let the Orion charge when solar charges the first battery.
As already stated you can tweak input voltage settings to make it charge continuously. The BMS for the first battery should prevent over discharge.
The use of the HL pins are in the manual.
How you signal it without the alternator or switch depends on your other system components
Hi @Gregsut One option to control the Orion is to use the engine detection feature and set it to be slightly lower than the absorption and float voltages on the mppt. Other options include using the relays in a Cerbo or BMV712 or the relay on your mppt (if it has one). Each device has slightly different ways to trigger the relay (for the bmv and mppt you can have a look at the demo library in victron connect).
No Engine detection needed as this will be charged by a separate battery isolated from the engine and charged by solar only, so I need it to be on 24x7.
