... /on-grid 4. safe,portable,easy install 5. 25years output 500W Off-grid Home Solar Power System 1. solar system for ... -grid4. safe,portable,easy install5. 25years output 1) Solar panel: 500W(250W*2)poly silicon solar panel Converting efficiency≥ 16% poly ... -50/60HzInverted output of pure sine wave Rated output power 500W for loadse.g.: lights, TV, electrical heaters etc. 400W ...