the marine (hybrid) was a good move. Functionally, you could have also parallel’d a starter battery in to handle the current, but it would be susceptible to discharge stress as the pack as a whole dropped into deeper discharge - the deep cycle(s) would be fine with it but the starter battery would groan.
the marine batteries are a hybrid, which also can be compromise. they give up some depth of discharge for additional burst current. IIRC the typical rule of thumb for a marine battery is down to 50%, whereas a good deep cycle can dig as low as 20%. Starter batteries are happiest, generally, when not brought below 80%.
the marine batteries are a hybrid, which also can be compromise. they give up some depth of discharge for additional burst current. IIRC the typical rule of thumb for a marine battery is down to 50%, whereas a good deep cycle can dig as low as 20%. Starter batteries are happiest, generally, when not brought below 80%.