Arguably the best controller + some pointers :-)
this is my second unit and i tried the refurbished version this time to save a bit of money and i am not sorry. Midnite Solar Classic 150 Mppt controller is arguably one of the best units you can buy no matter if you are a pro or beginner. it is probably the unit with most safety features out there and is easy to setup. just one thing to remember... always connect your batteries BEFORE you connect your PV panels, that's really it. it is hard to mess tings up if you remember that one thing which is pretty much universal truth but beginners don't know that so i stress it here. if you want to experiment with PV, Hydro, Wind power, you cannot get a better unit in my experience. in fact that is why i got this second unit. the first one was for my PV setup which this unit will go into so i can use the original one to experiment with wind which is more complicated especially when you are making your own special generators like i am. if you are a beginner... i recommend you start with PV. there are two more variations of this unit... the 200 and the 250... these numbers refer to the max voltage the units will accept from your PV panels. if you have a long distance from your panels to your controller and batteries, then you will want to run the higher voltage setup by combining your PV panels in series. higher V allows you to have lower A so you will not need a hugely thick cable on your long run. on shorter runs (less than 100') the 150 will give you more efficiency and plenty of max voltage. also remember that the further the difference in V of your battery setup and V of your panel setup the lower the efficiency will be. this is a universal truth for V conversion. so if you want to have say 24V tesla batteries in parallel and your PV panels output 50V, you will have less efficiency (other things being equal) if you string two of the in series which will output 100V because the controller has to convert twice as much V to A and that means more waste. so either don't put the PVs in series OR also put your batteries in series and run a 48V, or 72V battery setup depending on the number of batteries you have. remember this is a universal truth about electricity so same is true with converting your battery V to 120AC for powering your home. you loose again. and if you have regular screw in LED lights, you loose again. this is why i have converted all my house to match my battery setup. every time you have an equipment with a power supply, transformer, converter, you are loosing power. the larger the V difference the more power you loose.
Verified purchase: YesCondition: Pre-owned