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EpRec 1000W Grid Tie Inverter - System Requirements and Technical Specifications -AC Output Power:1000W -Maximum AC Output Power:1100W -AC Output Voltage: 90V-140V -Frequency Range: 48Hz ~ 62Hz -DC Input: 10.8V-30V -MPPT range: 15.5-23V -Solar Panels:200W or higher, Voc20-24V;Vmp18-21V -Packing with:Grid Tie Inverter, Power cord US Plug, English user manual Seller note, Some buyers may have concerns about the output power not reach their expectations. Here is the reason. This unit was ideally designed for a 18V solar panel If using 12v battery as input, the inverter will not reach it's max power point. We will suggest using 24v battery as input source to get a better output power. there's always a loss in power in conversion from DC to AC. Also through Heat loss of energy. So if you're expecting to get you're 100 % out of the machine it won't give you that. solar panel has the loss too, so please don't calculate the efficiency as inverter output power/solar panel specification. because solar panel and invergter all have own efficiency.