Low power (under-voltage) will certainly damage any refrigeration applianceâs compressor. The solatek Fridge Guard protects your appliance by disconnecting the power when it goes below unacceptable level. Additionally, there is a delay when power returns to normal. This will ensure that the appliance is not switched on-off repeatedly during fluctuations nor is it subjected to a massive surge normally experienced when power returns after power cuts. The fridge guard will disconnect the power to your appliance if the mains voltage drops below or above a pre-set limit. It will also will re-connect automatically only after the supply has returned to acceptable limits.