So this will run some powerheads and a smallish return pump or dc lower wattage one unattended. Nice.
Not enough juice to run heaters unfortunately. Esp in winter.
Yes. Dc return pumps are more efficient and lower watts than ac and can be dialed back if needed. But it will run smaller ac return pumps also
My prior pump was a mag drive at 60 watts and I switched to a dc pump at 20 watts and tripled my runtime on battery