This is usually a late fall or early winter subject but felt this info might help others in this upcoming winter season.
I don`t know if anyone uses a batt tender or not. Last fall, winter was my 1st use.
I removed the batts from my 2 riding mowers. Charged both to full capacity. Brought both into storage room off my kitchen. Unheated but warmer than outside.
I made a wiring harness to use tender on both batts. I checked voltage after charge and after tender use all winter. There was less than a .10 difference in voltage on each batt.
So if you use a tender I think it will work keeping 2 batts topped off. As it worked on my 2 small mower batts I see no reason it should not work on 2 cars sized batts. I do think these are just a small trickle charge that is used as needed.
I don`t know if anyone uses a batt tender or not. Last fall, winter was my 1st use.
I removed the batts from my 2 riding mowers. Charged both to full capacity. Brought both into storage room off my kitchen. Unheated but warmer than outside.
I made a wiring harness to use tender on both batts. I checked voltage after charge and after tender use all winter. There was less than a .10 difference in voltage on each batt.
So if you use a tender I think it will work keeping 2 batts topped off. As it worked on my 2 small mower batts I see no reason it should not work on 2 cars sized batts. I do think these are just a small trickle charge that is used as needed.