Victron Energy SmartSolar MPPT Solar Charge Controller (Bluetooth) - Charge Controllers for Solar Panels - 100V, 20 amp, 48-Volt

Purchased for a lifepo4 homemade battery box. I have to say this controller surpasses the interfaces of all the $15,000 enphase and solaredge junk i have sold. Obviously different market than off grid but i have to say the bluetooth interface is instant, crazy accurate and has spectacular setting capabilities which are so easy to adjust. I purchased the 100-20 12-24-36-48v model because i wanted something versatile to charge my 48 v e bike and my 36v golf cart and my 12 v solar box. In case you dont know, a conventional 60 cell panel will only work with 12-24v since the solar v is like 30-33v. For 36 and 48v banks you will need 43&55v or two 60 cell panels in series or like a 96 cell panasonic or sunpower panel if you want just one panel. 2 is better and you can limit charge current to the bank in 1 amp increments for small amp hour banks. Will attempt resurrecting old lead batteries and provide update on this restore functionality.

This solar charger is a awesome piece of engineering! It changes 12v all the way up to my up to my 60v Ebike battery. Bluetooth connection to change the settings. It has it all. A+ Victron.

Returned because it did not fit my requirements and bought the 150/35. Did not come with instructions in box which were not really necessary as i have an 100/15 already. Simple to use right out of the box. The bluetooth is absolutely awesome! Great units not made in China!