Lithium Ion battery size for 500GPH 12v bilge pump

[Alisske]

I wanted to buy/create a transportable pump for my aging father to bail his dinghy

I was assuming a smaller lithium ion battery with a 500GPH pump would be both light and effective for bailing a 12 foot dinghy after it rains.

Budget can be 2-300$ for the battery if needed

It would be carried down to the dinghy and a placed in the lowest part of the boat. I may permanently mount the pump and have leads run up to the edge of the boat.

Any input would be helpful. Especially with the battery selection.

I will be keeping it on a trickle charger in the garage between uses.

Thanks in adavance. I know its not a trawler specific question, but i have found this group to be the most reasonable with design and application of bot related equipment. .

 

[mike66]

12V 50Ah Lithium LiFePO4 Deep... https://www.amazon.com/dp/B09Y3DNKB2?ref=ppx_pop_mob_ap_share
I use this for my electric dingy motor. Gives me about an hour run time and is very light. Should do the job.

 

[Alisske]

Thanks for the feedback. At 10lbs, that will work! And it has a handle to boot.

 

[DavidM]

A 500 gph pump will draw about 5 amps and will probably only have to run less than 10 min to pump out a boat after a hard rain.

Almost any battery will work including a 10Ah motorcycle starting battery. I wouldn’t spend the extra bucks for Lithium. An AGM motorcycle battery should work fine for less than $50 and a Noco 1A charger for about $30 will keep it up between uses.

David

 

[Alisske]

Appreciate the info David.

Good luck on the season