Doctor Pancakes wrote:Question: Any safety (or other) concerns with just hooking the SLA battery in parallel with the deep-cycle one by day to charge it, given their different chemistries and charge levels?
Token wrote:All lead acid batteries have an internal resistance. When you connect two in parallel there is some seepage before the voltage is equalized UNLESS there is a 13.8V DC source dumping current into the circuit. Then its just a parallel resistor network.
Token wrote:You can connect both batteries in parallel but make sure you use a thick cable.
Token wrote:The solar will charge both at the same time. If one is smaller, it will just present angreater resistance and get less current.
Trishntek wrote:One thing about batteries and electricity is you usually don't have to wait very long to find out whether you did it wrong!
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