The Boating Forum - Livewell Battery Drain

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View Full Version : Livewell Battery Drain

07-22-2013, 04:08 PM
I have a 17' flats boat with a 90hp Johnson Ocean Runner. The boat only has one battery which runs everything electrical on the boat. That battery is less than 6 months old.

With that set up, how long can I realistically run the live well on the boat (it has a 500gph pump if that helps) while still having enough juice to safely start the engine?

The boat doesn't have a GPS or anything else that would drain the battery (except for nav. lights, but those won't be on).

Thanks :thumbsup:

07-22-2013, 04:20 PM
Need your battery size and specs of the battery for any feedback. Also do you know your pumps amperage draw? Still it will just be a guess. Typically however a 500gph pump does not draw a battery down to bad especially if you are cranking and running the engine several time through your day.

07-22-2013, 04:40 PM
If you're trying to keep fish or bait alive you would probably be better off putting an aerator in and then just flushing the water a few times an hour with the livewell pump. The aerator's draw less current than the pumps do.

07-22-2013, 06:38 PM
Sorry about that. The battery is an Autocraft Marin 12v starting batt., and the pump is a Rule 500gph livewell pump. I'm no expert but according to the pump it says 12 volts-2 1/2 amps.

My last real fishing trip out we used an aerator due to the live well pump which was broken. For short trips the aerator's great but for longer trips the convenience of a livewell constantly pumping fresh clean water is sooo nice.

10-05-2013, 08:30 PM

10-05-2013, 08:38 PM
I don't think I'd even worry about it unless you run the pump like all day long and don't ever start up the boat and recharge the battery some. I do like having a secondary battery to run accessories off, though.

linesider 159
10-05-2013, 09:55 PM
You are a brave man. I suggest having a switch put in and getting a second battery. Its not if but when that battery dies while on the water. You better have a pull start cord with you. That battery will last about a year, if you decide to keep 1 battery then get a dual purpose not a starting battery

10-06-2013, 04:17 AM
Install a bait well timer.Bass pro has them.I run mine on the timer with no problems ever.

10-06-2013, 05:45 AM
Consider adding a volt meter to monitor the battery level. As the battery ages, you still know the condition. Also, Consider an auto jump box to start the boat as a back up if you do not want to get a second battery which is the A position...

10-07-2013, 07:28 AM
First of all, get a dual purpose battery. Then buy a a fish finder that has a voltage alarm on it (you need one anyway) set it to alarm at about 11v or so. Then if it goes off start your motor for a few minutes.

10-07-2013, 08:17 AM
Rhysleo, after reading your thread I suggest you Google "marine battery maintenance", and read a while. When asked about your battery information you responded with the make and model, but with no specifics about the size, amps, etc., thus from my observation you don't have a clue about what you are dealing with. A battery or batteries are the heart of our boats, thus we must be well informed about them. Learn about your amp capacity of your battery, the amp draw of your bait well, and any additional electrical equipment you might use, such, as your anchor and running lights. I use a baitwell switch which cycles the pump on and off every few minutes to keep the bait alive, or it can run continuously for filling the baitwell the first time. There are switches available which can be set to different cycle lengths, but mine is set at a fixed interval of on and off. The purpose of the intermittent switch is to save the battery amps and to keep the bait alive at the same time. Good luck with your battery knowledge.:thumbsup:

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