St. Pete Sun

Solar Photovoltaic Power FAQs

How much solar power should I install?
We recommend between 5kW and 10kW for a typical house. We will use an 8.0kW system for our examples.

How much money will this save me on my electrical bill?
A typical 8.0kW system will save you about $150/month on your electric bill.

How much will a solar system cost?
The installed cost of an 8kW system should be around $22,000. ($15,400 after the Federal Rebate.)

What is the payback period for a solar system?
At $150 of savings per month, it would take between 8 and 9 years to pay back the system cost of $15,400. However, with financing, most people can start saving money from day one.

How long will a solar system last?
Solar panels are usually warranted to produce at least 80% of their original power rating for a period of 25 to 30 years. The panel life is probably much longer than that. The power electronics (inverters) are usually warranted for 15 years.

Should I install batteries with my system so that I can go off-grid?
No. We do not feel that batteries are financially beneficial yet.

Will my solar panels run my home when the power is out?
No, unless you install some very expensive batteries. Click details for some upcoming options.