Battery runs down quickly

JP Boji

New Member
May 20, 2020
3
Boat Info
2019 Sea Ray 280 SLX
Engines
MerCruiser® 6.2L MPI ECT Bravo® III w/DTS Sterndrive (350 hp - 261 kW)
I have a 2019 Sea Ray 280 SLX that I purchased new last year. When I drop anchor, turn off the boat and listen to music for several hours my battery runs down to the point where I almost don’t have the power to start the engine or raise the anchor. Is this normal? The boat has two batteries and I would have thought they would have lasted longer. Thanks for helping out a Sea Ray newbie!
 
Two batteries as one, or 2 banks? With a 2 bank setup, one battery should always be isolated in reserve, to restart the engine. So one running low after several hours can be normal, but with a dual bank system used/wired correctly and 2 good batteries, one should be fresh to restart the engine.

More info needed about the setup, size of batteries and how its being used.
 
If you are cranking the stereo with a big amp, I would expect it to run down (and your neighbors probably appreciate it...but I digress)

It bears mentioning that you should not be attempting to either raise or lower your anchor without the engine running. It puts more wear and tear on your batteries, and can be dangerous, should your engine fail to start.
 
I would suggest that one or both are bad. That should not happen.
I would pull them and have them tested. The dealer or any auto parts store can do this for free. Very similar to what happened to me w/ My 24' Nautic Star Boat 2017 after the 1st year. I suspect that the batteries were compromised with the dealer before delivery to me. I just replaced the batteries after being tested and confirmed as bad. I last all day w/ the New batteries. I also do select (1) battery when on the hook.. must do.
 
Batteries are bad or undersized, should not happen under that use scenario.
 
Thank you all very much for your replies!
 
another reason for dedicated engine batteries and dedicated house batteries
 

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