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I use a Noco battery tender with dual ports since I keep two 911s in my garage on tenders between drives. I'd recommend one of these single output models like the Noco Genius 1 and some quick connect leads (sadly sold seperate). I occasionally will hook the disco up with a set of extension cables when it sits for awhile and I'm away. The Noco genius line is nice as it'll figure out what the ideal charge rate to keep your battery healthy so you don't need to.
Thank you for your responses. The Battery Tender brand offers products designated Automotive and Powersports (plus Marine). The lowest amperage unit designated Automotive is rated at 3 amps. The 12V models designated Powersports are rated at 750mA and 800mA. Given my setup, I'd prefer a version where the adapter plugs directly into the wall outlet, which is the case for the two Powersports models but not for the 3 amp Automotive model.
Based on earlier comments, I infer that a 750mA or 800mA model is fine for simply maintaining a fully charged automotive battery. Is that correct?
Given that one of my trickle chargers will recharge a low battery overnight at 2 amps, I would think that 750mA would be plenty to maintain a healthy, fully charged battery.
I use a Noco battery tender with dual ports since I keep two 911s in my garage on tenders between drives. I'd recommend one of these single output models like the Noco Genius 1 and some quick connect leads (sadly sold seperate). I occasionally will hook the disco up with a set of extension cables when it sits for awhile and I'm away. The Noco genius line is nice as it'll figure out what the ideal charge rate to keep your battery healthy so you don't need to.
I second the Noco Genius. I have a 1 Amp "Noco Genius 1" on three different cars, including the Rover. I keep it plugged in all winter when not driving much. They're waterproof and great at charging/maintaining.
Thanks again for your comments and advice. I was going to buy the Battery Tender brand device, but I ended up buying the LeicesterCN unit instead (Amazon link below). It has overwhelmingly good reviews and was half the price of the Battery Tender brand. Time will tell …
The ring terminal cable is not long enough to reach where I planned to attach it, so I ended up attaching it to the POS (+) terminal on the winch contactor and to the NEG (-) terminal on the winch itself. I then zip tied the cable to the diagonal support behind the grille, leaving 6-8” or so dangling that I can reach in and retrieve to connect to the cable from the maintainer.
I’m happy with this setup, and I will do my best to report back after a few months, or sooner if something goes sideways.
Hah! Good point. Since the truck is garage-kept maybe I'll clip the key to the maintainer cable so I have to go to the front of the truck to get the key.
Re-upping this old thread because I had struggled with similar issues with the fleet parked outside. After chasing it for a couple of years I found a solutions and decided many others in the community could probably benefit as well. So now we an Extinct Motorsports solar battery maintainer available for those of you who keep their occasional use vehicle outside.
