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Originally Posted by fairracing31  They have much bigger ones then that, that 5watt was the second biggest I saw. The smaller one was a 1.8watt I dont know how big your trailer is, you could use the entire size of your trailer for a solar panel. Of course the bigger panel you go the more dollars it will cost. The 5w is around thirty bucks. But I have seen some at Harbor frieght store alot cheaper.
The one from the photo is from northern tool. |
The best I can figure a sla charger that comes with one of the scooters is 48 watts but it charges in two hours. If you rode the bike an hour, it would need about eight hours to recharge using solar alone. Thats at five watts. Then you run into the over charge problem, but they make a cut off switch for them some come with it some don't.
But there is something else. You can buy one small panel and try it. If it doesn't charge enough you can add another and another till you get what you want. Unlike the wall charger, the size of the batteries you use becomes an issue with solar panels. But again you have the how long will they rest between use. Lots of variables.