Review on Efficient 40A MPPT Solar Charge Controller Tracer 4210AN with Remote Meter and Temp Sensor Cable – Ideal for Gel, Sealed, Flooded, and Lithium Solar Battery Charging by Marco Cervantes

So far so good! I use two of these due to my solar configuration. Running 2 sets of 4 panels, CSUN 305. Run 2 in series and then a parallel string into the controller so that in this configuration with full sun almost maximum performance is achieved. I've been following the MPPT feature and it's worked great so far! It distributes volts/amps correctly and regulates as it should. I still have a lot of settings and configurations to test, but I can finally recommend a good controller that doesn't cost an arm and a leg. Top five for the money so far. and I've tried MANY cheap controllers. BEWARE of fake controllers claimed by MPPT, one of them is listed in Revain which I reported to Revain. This is a REAL MPPT controller, works great and is a great price! HIGHLY RECOMMEND (and I've tested MANY). UPDATE: 11/30/17 When a controller failed but quickly excellent customer service and problem already resolved. I would highly recommend both the device and the seller.