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This is a true MPPT charge controller. The open box and lower price did not impact functionality. I have the readout meter so i can tell how well the controller is working. I'm using it for 360 watt solar panel. it is working as expected. I would buy again if needed.
Verified purchase: Yes | Condition: Refurbished
This is the best controller I can find without breaking the bank. I've used PWM controllers before but and clouds and they shut down this just keeps charging without fail. Spend the extra money and get the best.
Verified purchase: Yes | Condition: New
I should have bought one that could handle more than 100 amps
Verified purchase: Yes | Condition: New
Good product!
Verified purchase: Yes | Condition: Pre-owned
I bought this as a return from Renorgy so far very pleased with it I like it so much I bought a second one I have been using it to power my refrigerator and some lighting at home so far it's worked out really good my batteries are usually topped off by noon on a sunny day I have it setup for 12v and I have5/100 watt Renorgy 12v panels on it ,,,, on rainy or cloudy days after about a day I have to put the refrigerator back on grid power until the sun comes back out I'm probably going to use my second 4210 and 5/100 watts panels in parallel to my first 4210 so I can charge the bank on cloud cover days as well 2 charge controllers on one battery bank my is made up of 4/6 volt golf cart batteries
Verified purchase: No