how long will the backup battery last if i hook 1 m1 and 1 mp40 and 1 mp10 ?

[chercm]

how long will the backup battery last if i hook 1 m1 and 1 mp40 and 1 mp10 ?

anyone can advice please ? or just it better to just run the mp10 and mp40 in the main tank ?

 

[mfinn]

I think it would be tough to calculate.
It would depend on what percentage the flow is turned to on each of the pumps.
IMO, I would just have the backup attached to 1 pump to provide flow in the main tank, where it's going to do the most good.
After all it is a emergency device.

 

[Reeefer]

Instead of guessing, with the battery charged remove live power and see what happens.