I agree on both your points, the Outbacks are awesome and so is the chemistry of the cells.
Lets think of an insurance policy for your system. Do a Contactor with a voltage controlled switch. That way IF the controller hangs because of a hardware or a software issue you will be protected. Cheap insurance.
On my DIY system I protect both the High side and the DOD. It is cheap insurance. I have seen many controllers from several major brands do crazy things especially if networked into a "System".
One day Ill be able to post my DIY battery on here.
Regardless Great battery bank!
Cheers!
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