1073.50 approx. run time on battery

[chris melb]

Hi All,

Just wondering if calcs are correct. I'm planning to connect a battery back up to my 1073.50. I will use the Tunze safety connection (6105.50) and I will be using a 12v SLA 100Ah battery. By my calc, and correct me if i'm wrong, but the pump will be running at half speed due to 12v (~22watts) so 22/12= 1.83 amps. My battery is 100Ah so I if I divide this by the pump draw (1.83amps) I get 54hours, is this correct?

Appreciate your input.

Kindest Regards,

Chris

 

[chris melb]

Can anyone check logic above re. run times? Is my calculation more or less correct.

Thanks so much

 

[rvitko]

That sounds about right, but keep in mind at 12V head pressure drops substantially. I would expect almost no flow at 1m, for this reason backing up a return pump is not terribly practical.

 

[chris melb]

Thanks Roger it's for aquaculture purposes so I can't rely on wavemakers and have to rely on return pumps for this system. I've installed it all and only have the pumps set to 50%, when the pumps switch across to battery, the flow is substantiall less but still should be enough for my purposes.

Thanks so much for your response, this product is great!

 

[rvitko]

OK, just so long as it works, with typical display tanks on 32" stands the flow is non existent on 12V so I wanted to be sure it would work for you.