12 Volt Wind and Solar Charge Controller w/ LED Display & 1200 Watt Divert Load Dual microprocessor controlled for stability and accuracy On board relay isolates electronics from back voltage spikes from large 440 amp relay. This is important to get the longest life out of the electronics. Multiple user changeable settings and trip points for many various system requirements and applications. You can change the dump point voltage level, end of dump voltage level, and length of time in divert mode when end dump point voltage is reached (between 0 to 999 seconds, or 0 to 999 minutes) Plug & Play: Long leads for easy termination to your 12 volt battery or battery bank Isolated Electronics Protection - Almost impossible to accidentally connect wind or solar directly to the circuit board