Solar Panels, for CIVIL discussion

I have 3 120 watt tweselvans.I also have 3 solar generators just incase the power goes out for more than a day to alternate with my gas generator.Use solar at night and gas during the day.Its Just for emergency but A friend is helping build a 16x20 green house and my oupes 2400 will power it till I get electricity run to it.Using a small fan and grow lights it will do.