Join Date: Sep 2008
Location: Victoria B.C. Canada
Thanked 109 Times in 100 Posts
Rep Power: 10
Welcome to Sailnet
Ideally the charging should go first to the house battery - the battery that will always need the most charge. The solar output can also go the the house battery and the ACR will take care of the start battery. The start battery will never need much charging as long as its use is limited to engine starts.
Are both batteries AGM? Are they the same size?
The charge outputs with an ACR should go to the largest battery or bank - which is never the start battery. The ACR is dual sensing so the change needed is to switch the alternator output to the house battery.
You don't say what wattage the solar panels are.
The controller, which should be an MPPT controller, should also go to the house bank, the ACR taking care of the start battery here as well.
The Victron monitor is a good choice.
I, and many others are not fans of the Blue Seas switch in the kit (Dual Circuit Plus) because it doesn't give you the option of using the house battery to start without combining the banks. If one battery is too weak for an engine start the last thing you should do is combine it with a good battery - especially with AGM batteries and their high acceptance rate - one result could be 2 batteries that will not start the engine as the good equalizes quickly with the bad.
Manual switching will not be required.
Living aboard in Victoria Harbour