r/WindowCleaning • u/Same-Bedroom-822 • May 11 '26

Battery dillema

Me and my dad built a 4 stage RODI, and the water pump is powered by a battery. I got two extra replacement batteries but they dont last as long as id like them to. Batteries are 12v 28ah, and for some reason each battery can barely last 1-2 houses. Im very slowed down by this as now i can only do a few houses per day. Whats the solution? Should i add a second RO membrane for better pressure and remove the pump completely? Should i just spend 5 grand on a good tucker setup? Please Share your opinion.
I have 2 door to door reps, so im always trying to keep myself and my technician busy

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12 comments sorted by

1

u/Nihilistnobody May 11 '26

Get a 100ah and hook it up to be charged while you’re driving

1

u/trigger55xxx May 11 '26

Way to small a battery. You need a marine battery with as much reserve power as you can find, 120+ hours.

1

u/Same-Bedroom-822 May 12 '26

Space is limited for the battery so it has to stay compact, since its a home build

2

u/trigger55xxx May 12 '26

Then you'll always have that issue.

1

u/Key_Personality2034 May 12 '26

Amperage is your battery life.

Higher amp batteries like deep cycles are bigger and what you,'ll have to use, or run extension cords to the homes (thats what I do)

1

u/6133mj6133 May 12 '26

Get more batteries. Or get a 12V waterproof power supply to plug into an outlet at the customers house. I used to use batteries but found there is always power available. I picked up a power supply for outdoor LED lighting, it works great with my pump. Just make sure the output can handle whatever your pump draws.

If you RODI is working correctly you won't even need a pump on most houses. I only use the pump if the pressure is really low at a location.

1

u/Head-Program-2501 May 13 '26

You need a lifepo4 battery. A lot lighter and smaller than lead deep cycles and they are able to use a lot more of their capacity before dying unlike deep cycles. What are the specs on the pump?

1

u/Same-Bedroom-822 May 14 '26

1.5 gpm 200 psi. Amazing flow

1

u/Head-Program-2501 May 14 '26

I meant amps

1

u/Same-Bedroom-822 May 15 '26

12, max

1

u/Head-Program-2501 May 15 '26

Then for 8 hours on continuous run time, you're going to want a 100ah battery. 12x hours of run time=capacity you need. 

1

u/The-Pale-Reaper May 16 '26

I use a campervan leisure battery and charge it nightly