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CieM2961 10-27-2012 12:42 PM

Back up Battery
Is there a way to build a back up battery (car battery) (self powered) for a Sump Pump. Not actually creating the battery itself, but using a battery with external attachments and using it to run a Sump Pump. I know the absurdity of how this sounds as I did not do any research prior. Other than is this possible, How would I go about doing it and what would I need. I saw part of a self do it video on you tube but I am sure it would need more charge/ power than what I was watching. Please I am somewhat time limited with this, If some one could help explain or give advice I would so greatly appeciate it

timmay5309 10-27-2012 12:48 PM

You cannot use a normal car battery, it would have to be a marine battery. Here is a kit under $200 you can buy from Home Depot. I am sure others will chime in with additional ideas on how to make the charging setup from household things...

firehawkmph 10-27-2012 12:50 PM

just go get the kit from any big box store or plumbing supply. No need to reinvent the wheel on this one. It comes with everything but the deep cycle battery. It will keep the battery charged all the time without overcharging it. Very simple install.
Mike Hawkins:)

Micdisc 10-27-2012 12:53 PM

First, we would need to know what size sump pump you are running?

My first and easiest answer is to get a good battery backup (like for computers).
For example, here is one capable of doing 900W:

Which is basically a little less than 1 1/4HP (1.2 HP to be exact)

If you wanted a longer run time, then you could replace the internal battery backup battery with a car battery, since the voltages would match. 12V to 12V battery replacement. Then you would get a longer run time. Much longer. Especially if you get a good deep cycle battery.

On the other hand, these backups are meant to run computers and I don't know how they would handle the amperage surge when the motor kicks on. My guess is that it would be okay.

Hope this helps.

CieM2961 10-27-2012 01:10 PM

I appreciate the help, thanks. I am in NJ ( I know," good luck", right?) and most items are sold out so iam trying to think what else so we are not knee deep or more in water. Thanks again this should help out

Billy_Bob 10-27-2012 01:21 PM


Originally Posted by CieM2961 (Post 1038973)
I appreciate the help, thanks. I am in NJ ( I know," good luck", right?) and most items are sold out so iam trying to think what else so we are not knee deep or more in water. Thanks again this should help out

Well a generator, but those are probably all sold/rented as well?

Also an "inverter" will convert car battery DC power to "plug in" AC power. Solar electric businesses as well as camping businesses sell inverters.

Car batteries you can get at any automotive store.

Also in a marine or boating store you might be able to find a hand powered water pump.

If all else fails, I'm sure they would have plenty of buckets available all over. Get some beer and friends to go along with that of course! :)

CieM2961 10-27-2012 01:25 PM

thanks,We r in NJ and pickings are real slim, gonna try and look some more, but was also looking at another alternative just in case. Thank you

gregzoll 10-27-2012 02:29 PM

You have plenty of time. Worrying about it is not going to make things any better, but it will hurry up the process of losing your head trying to guess what is going to happen.

If you want another deep cycle battery, get it. A genset is only good if the person using it knows how to properly use it, not to power every little gadget or appliance in the home/structure.

gregzoll 10-27-2012 02:32 PM

Billy_Bob, I have grown up without having a genset, still do not have one to this day, because I see no need. I remember when my brother & I had to haul a shop vac up a flight of stairs in a house, due to the sump went out. We just ended up giving up and worked in the water putting in a new sump to get the water out of there.

We loss some stuff, but the great thing is, the furnace was still working at the end. One of those that did not have a circuit board down below. It was back when the relays, etc were up in the burner box area. Even the washer & dryer survived the 12 inches of water we had down there.

People are just blowing this whole thing out of proportion.

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