The frequency of the supply voltage is 45 Hz 65 Hz. Output voltage range Mains voltage regulator: 204 - 240 V, UPS: 230 V (+ - 3%). Frequency of 50 Hz UPS output voltage (+ - 0.5 Hz). Overload protection (battery supply) In the case of an overload of 110% - 130%, the power supply is disconnected after 30 seconds.If the overload is higher than 130%, the power is disconnected immediately. Overload protection (mains) The device warns about overloading until the fuses trip. Permissible humidity 10% RH 90% RH. The item "VOLT sinus PRO-1000S PURE SINE WAVE SOLAR INVERTER" is in sale since Wednesday, May 13, 2020. This item is in the category "Heimwerker\Erneuerbare Energie\Solarenergie\Photovoltaik-Zubehör\Solarmodule". The seller is "audiopioneer_pl" and is located in Warszawa, MAZOWIECKIE. This item can be shipped worldwide.