No, the Leaf 12V maintainer is very very stupid, at least in the original version. It's timer based.
And never leave the vehicle charging for more than a day, as during charging it uses more of the 12V battery and does not charge the 12V. I learned that the hard way leaving a Leaf charging while on vacation for a week. The little solar panel on the original leaf? Useless. I have a hack to fix this. On Sat, Aug 1, 2026 at 6:58 AM Darryl McMahon via EV <[email protected]> wrote: > Interesting. I had battery maintainers (either solar on dash or > plug-in) on all my ICE vehicles over the years. Mostly because they > typically didn't move for weeks at a time as there was pretty much > always an EV of some kind in the driveway to do most of my trips. > > It didn't occur to me to put one on the Leaf due to the big DC-DC > converter from the traction pack that should be maintaining the 12-volt > auxiliary. > > I'm content that the failed 12-volt battery had served its time and I > think served past its expected life. > > As for battery maintainers, I can come up with one of those pretty > easily (I sell an intelligent version). I should put one on the current > gasser - my SO will love having an electric plug hanging out from the > front grill (actually, not so much). Not so unusual around here where > we still have a lot of gassers with either battery blankets or block > heaters or both to improve chance of engine starts on truly cold days. > (Back in my pre-OEM EV days, I carried jumper cables so I could tap the > traction pack to jump start frozen gassers on the cold days. Can't do > that now on the factory EVs because I can't tap the pack or boost from > the auxiliary per the owner's manual. So now I carry one of the tiny > jump packs for that purpose.) > > On 2026-08-01 1:08 a.m., Bryce Nesbitt wrote: > > > > > That's exactly what the leaf does with a flat 12V battery. > > Just replace it, and put the new one on a battery maintainer. Under > > $200 at Batteries & Bulbs, expect a 3 year lifetime for the 12v > > battery, maye 4 with the maintainer. > > -- > Darryl McMahon > > -- > This email has been checked for viruses by Avast antivirus software. > www.avast.com > _______________________________________________ > Address messages to [email protected] > No other addresses in TO and CC fields > HELP: http://www.evdl.org/help/ > OT: If you use an Android device, please read https://keepandroidopen.org/ >
_______________________________________________ Address messages to [email protected] No other addresses in TO and CC fields HELP: http://www.evdl.org/help/ OT: If you use an Android device, please read https://keepandroidopen.org/
