12V device on a 24V battery?

[PureGame]

Hi Guys,

I have a question about Batteries.

I want to use a small 7.5Ah 12V waterpump for Goldpanning/Sluicing but I dont want to carry a heavy car battery to the spot every time.
My plan now would be to buy a 24V (truck) battery with around 100AH and just leave it in the car. Then use 100 - 150 Meters of cable (2mm²) to connect to a StepDown Converter (24v -->12v) at the Spot and connect the pump to the converter.

Can this work? Will i have enough power after 150 meters to still get the pump working? If yes, how long can i expect the 100 Amps to last while doing this?

Thanks in Advance,

Pure


PS: English is not my mother language so please excuse any spelling misstakes.

 

[Ralston18]

My thought is to just get a 24 volt pump and negate the need for Stepdown convertor at the Spot.

Odds are you will feel the need for a bigger pump.

As for the calculations:

https://www.techwalla.com/articles/how-to-calculate-amp-hours-by-watt-usage

https://www.batterystuff.com/kb/tools/calculator-sizing-a-battery-to-a-load.html

If you end up revising your plan then you can easily recalculate.