Protect MPPT charge controllers and grid-tie inverters from high PV open circuit voltage at low temperatures with the new Low Temperature Overvoltage Bypass (LTOB) from Apollo Solar. Solar module voltage rises with drop in temperature. Sometimes when the temperature gets very low, the voltage of
a string of several modules in series gets too high and causes damage to a charge controller or inverter. This problem can be solved by putting less modules in series, but sometimes this causes a sacrifice when temperatures are high. Now you can size the PV array for optimum performance without regard to high open circuit voltages at low temperatures. The Apollo Solar LTOB automatically switches modules out of the circuit if the temperature falls below 10 degrees F. One unit is required for each string of modules. Switch up to 8 amps per string. Installation is simple. Just plug in M-C connectors and stick the LTOB to back of the module. Zero power consumption.