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Author: Subject: Solar car battery charger ???
Alm
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Registered: 5-10-2011
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[*] posted on 12-9-2015 at 08:09 PM


Quote: Originally posted by motoged  
Nomads,
What recommendations do you have for a portable solar (trickle) charger for deep cycle car/boat battery that won't overload battery that costs under $100?

You need to be more specific.

"Car" battery??? Like starter? Like, keeping it topped up when not in use?

There are panels on Amazon starting from $20 and up to $60. Getting more expensive won't make sense, since they all are just panels with night diode, no controller to limit overload. OTH, 2.5W panel won't overload an average starter battery.

The second part of the question is where it gets confusing.

Car batteries are not deep cycle. Boat batteries are (usually) hybrids, can be called "deep cycle", alright. So... What exactly do you need, and what for?

Assuming all the missing info (not read all the 30 posts that might have contained those missing bits) - what you need is a fulltime "solar system" complete with "controller". Check solarblvd.com -> controllers. Also, check their panels.

It is NOT possible to suggest anything further because there is not enough data. Depth of daily discharge (your energy usage, in other words) is the biggest unknown.

Start with energy audit - estimate how many watt-hours or amp-hours you use daily. Multiply this by 1.5, to err on caution side. Then report back and I'm sure somebody will tell you required size of panel and controller. There is nothing to it.
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