Choosing the right solar controller/regulatorThe PWM is a good low-cost option:for smaller systemswhere the efficiency of the system is not critical, e.g trickle charging.For solar panels with a maximum power voltage (Vmp) of up to 18V for charging a 12V battery (36V for 24V battery, etc). The MPPT controller is best:For larger systems where the additional 20%* or more energy harvesting is worthwhileWhen the solar array voltage is substantially higher than the battery voltage e.g. using house panels, for charging 12V batteriesAn MPPT controller will yield higher returns compared with a PWM controller as the panel voltage increases. I.e. a 160W eArche panel using 36 conventional monocrystalline cells with a maximum power amps of 8.4A will provide around 8.6A at 12V; while the 180W panel having 4 more cells will provide the same amperage but 4 additional cells increases the panel voltage by 2V. A PWM controller will not harvest any additional energy, but an MPPT controller will harvest an additional 11.1% (4 / 36) from the 180W panel.For the same principle, all panels using SunPower cells with more than 32 cells require an MPPT charge controller otherwise a PWM controller will harvest the same energy from 36, 40, 44 cell panels as it does from a 32 cell panel.12v/24v/48v/96v Inverter mppt solar charge controller 20A 30A 40A 50A 60A 80A 100A 120A for Solar System AP series MPPT Solar charge controller1. Capable of wifi remote control2. Using advanced MPPT technology3. High converting efficiency higher than 99% for minimizing energy loss.4. Intelligent LCD&LED display.5. Adopted advanced DSP microprocessor control technology6.Capable of parallel in output,to expand capacity easily.7.Reversed current protection at night, over voltage and reverse polarity protection.8.Capable to selecting dirrent charging mode for various types of batteries.9.Range from 20A to 120A. Rated current20A 30A 40A 50A 60A 80A 100A 120ACommunicationRS485 communication portMPPT operating voltage12v 24v 36v 48v 96v 192v 240v 360v 384vMax PV input voltage150v(12v/24v/36v/48vdc)/200v (96vdc)/ 600v(192v/240vdc) / 800v(360v/380vdc mppt)