DC return pump on Controller and Battery Backup ?

[gregzz4]

Originally Posted by MarkoD

Why do you need a return pump on a battery backup? If the skimmer,heaters, reactors etc are not running what's the point of keeping the return pump going?

Just use the backup for power heads. They use less power and will do more good

I have a battery backup for my MP10s, and that's good enough for the DT
They can run up to 36 hours

But, if the power goes out for a long enough time, I'd like to avoid die-off in my sump and 'fuge

[gregzz4]

If anyone has an idea, I'd like to know of a way to run the pump on DC backup as I believe it will be cheaper to build my own rather than buy a UPS