Ramsond SunShield 12V 12 Volt 8A 8 Amp Solar Charge Controller Regulator

I purchased a Ramsond charge controllers about 3 years ago and it has preformed flawlessly since then. I have it connected to a 5 watt solar panel that keeps the battery charged in a 10KW Diesel generator. It keeps the battery charged at all times. The exact same battery kept going down after charging with a battery charger almost every three weeks. It's worth the price of the charge controller just to have peace of mind and no trouble. The battery has never gone down in 3 years! I also have a 20 watt Ramsond (black)solar panel and it produces far more power than the 20 watt (blue)solar panel by another manufacturer. Based on my experience with Ramsond, solar panels and charge controllers, Ramsond has products that are superior in quality. I have solar panels by 9 different manufacturers and charge controllers by 5 different manufacturers and some out-perform others. My main house solar setup has been running flawlessly since 2005. I have 4 independent solar setups for different projects that I work on. I will buy Ramsond products in the future! For people that have had problems with these charge controllers, this is my suggestion: Disconnect the solar panel from the charge controller, but leave the battery connected. Leave it disconnected for a few hours and then reconnect. Once the charge controller recognizes your setup, it will never give you any trouble whatsoever.

As indicated by another reviewer this controller leaks current back into the solar panels at night (or when an RV is parked in a garage) and discharges the batteries. It is worthless in a situation where one needs to maintain a charge in batteries, as in an RV.

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Excellent for a $20 controller. For situations where you are leaving the controller connected full time, and if your panel does not have one as many decent panels do, a simple diode on the hot lead will prevent discharge at night.

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Nice little controller, good price, no problems yet, don't know how long it will last! It does not have a weather proof case.

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I do not recommend this controller.

It works fine for charging; charging and floating at the correct voltages.

However, at night it leaks power back to the solar panel which discharges the battery.

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