Depending on the how much sun hours you get and direct sunlight but the 1000 watt system is 1 KWh with 4-6 hours of sunlight you can generate 4-6 KWh you just need to capture that energy or use it. I found that my 1000 watt system since in a shaded wooded canopy I never reach 1000 watts usually around 750 - 900 watts an hour is what I can grab but still a lot of energy to store