Heavy duty SolarKing Solar MPPT 60AMP solar regulator also known as solar charge controller. The unit is the beast! The unit has a large heat sink to dissipate heat. built in LCD display. Solar regulators are used to connect your solar panels to batteries so the battery is charged at the correct power rates. MPPT is the most efficient charging method for solar where the controller will modify the peak output power as voltage from the solar array changes. This unit has large terminal connections for thicker cables. The solar regulator suits both LiFePO4 and SLA/AGM Batteries.