Solar Panel Controller Advise
A friend of a friend has a new never used Grape Solar 280 watt polcrystalline solar panel and a 2210RN solar charge julator 12/24 controller for sale. He bought them and decided not to install them. ...
Forum Discussion
This little 20A guy may burn out with 280W panel if you use it where Jim in Denver uses his. Yes, your amps may never reach 20, but if they will, it's your money against Chinese quality (and you can't demand 20A controller to withstand 21A for too long anyway).
In light of this, I would treat this combo like BFL13 treats his $20 PWM controllers - as a toy. Which in turn means that you shouldn't pay $100 or so. It also means that you shouldn't rely on it as your main source of energy - but it sounds like this is fine with you.
The panel is a little overpriced, by today's markets.
280W*$0.75=$210, plus 30-40 bucks for a toy with blinking lights. $240-250 total. And I would only buy it if your batteries are somewhere inside, and the controller can be mounted in the same space. Because without remote temp sensor and with batts outside your voltages will be always off.
In light of this, I would treat this combo like BFL13 treats his $20 PWM controllers - as a toy. Which in turn means that you shouldn't pay $100 or so. It also means that you shouldn't rely on it as your main source of energy - but it sounds like this is fine with you.
The panel is a little overpriced, by today's markets.
1L243 wrote:
What do you guys think would be a good offer to make for this system?
280W*$0.75=$210, plus 30-40 bucks for a toy with blinking lights. $240-250 total. And I would only buy it if your batteries are somewhere inside, and the controller can be mounted in the same space. Because without remote temp sensor and with batts outside your voltages will be always off.
