I recently finished a project in which I installed an additional cigarette lighter port on my car that was always on (the existing one was only on when engine was running), and connected a small solar panel to the new cigarette lighter port, to top-up the battery.
I rarely drive the car, maybe once per 30-60 days, and had found that the battery had discharged a couple of times when I did finally get around to driving it.
I'm sure this will correct the initial problem I installed it for, but came across a question.
I was reading online that sealed-lead-acid batteries should be 'maintained' either monthly or a few times per year with an 'equalizing charge', which I read was specifically over-charging the battery to bring the cells up to the same voltage.
My question is: If the solar panel plugged into the car is delivering a consistent 17.5-18 volts throughout the day, with a small amount of current, would that equate to the same thing as me having an equalizing charge performed on the car? I'm not sure how high the battery's voltage will go with this constant trickle-charging, but to me it seemed like it might stop off around 12.7-13 volts.