[quote=Clifford]I’m new at this, so excuse the novice questions:
3.8kWh x 4hours of sun/day x 30 days = 456 kWh/month
1. Do you use about 450 kWh/month ?
2. If you end up using less than what your system produces, what is the rate that SDG&E pay you ?
3. How long does it take before you’ll recoup your investment ?[/quote]Most of the time, I use more than what my system produce. It has kept me in Tier 1/2 most of the time though. It does a better job keeping me in Tier 1 during the Summer and worse during the Winter. Especially months where there’s a lot of cloudy days. I have net metering so, so months where I over produce, it’ll stay as a kWh credit to offset my future over usage. I’ve been averaging about $150/month saving each month. So, for $11k investment, it should pay for itself in ~6 years. SDG&E pay you back in wholesale price (which is lower than $0.17/kWh you’re paying for Tier 1), so it’s not a good ROI to get a system that over produce.
