Dead battery

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   In Fl you will probably need to recharge the batteries more than once a month even if you have nothing connected to them. 
Jato's experience in northern MI is not going to be what you experience. That is because the battery self discharge rate (the rate at which it loses charge with nothing connected to it) is higher the warmer it is. The rule of thumb is the rate doubles for every 10 degrees C (18 F), so your battery self discharge rate is likely 10 times or more what Jato's is.   And you do not want to leave the batteries partially discharged or the plates will be damaged and they will permanently lose capacity. 
In your case, with no grid power at your storage site, I  concur with the suggestion of adding a small solar charger mounted on the trailer permanently. If you are using dual golf cart batteries you can get a 10 watt or so solar module and connect it directly to the battery through a 5A fuse (to protect the wire from shorts) and not have to have a charge controller. To start with, check the battery water level and add distilled water as needed every two weeks until you get a good idea about how often you need to add water. 

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offgrid Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 23 Jul 2018 Online Status: Offline Posts: 5290	Topic: Dead battery Posted: 28 Nov 2019 at 11:32am
	In Fl you will probably need to recharge the batteries more than once a month even if you have nothing connected to them. Jato's experience in northern MI is not going to be what you experience. That is because the battery self discharge rate (the rate at which it loses charge with nothing connected to it) is higher the warmer it is. The rule of thumb is the rate doubles for every 10 degrees C (18 F), so your battery self discharge rate is likely 10 times or more what Jato's is. And you do not want to leave the batteries partially discharged or the plates will be damaged and they will permanently lose capacity. In your case, with no grid power at your storage site, I concur with the suggestion of adding a small solar charger mounted on the trailer permanently. If you are using dual golf cart batteries you can get a 10 watt or so solar module and connect it directly to the battery through a 5A fuse (to protect the wire from shorts) and not have to have a charge controller. To start with, check the battery water level and add distilled water as needed every two weeks until you get a good idea about how often you need to add water.
	1994 Chinook Concourse 1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold

EchoGale Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 10 Mar 2019 Location: FL Online Status: Offline Posts: 461	Posted: 28 Nov 2019 at 12:35pm
	thank you
	Julie

jato Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 23 Feb 2012 Location: Kewadin, MI Online Status: Offline Posts: 3216	Posted: 28 Nov 2019 at 9:45pm
	Thanks for the clarification offgrid. In responding to the OP's original issue I looked at "Alaska Aviator" and not his location in N.M. So indeed his discharge rate as well as Julie's in FL are going to be much quicker than mine in northern Michigan.
	God's pod '11 model 177 '17 Ford F-150 4WD 3.5 Ecoboost Jim and Diane by beautiful Torch Lake "...and you will know the Truth and the Truth will set you free."