Questions to Ask a Potential Solar Panel Installer

Cost & Energy

What is the total installed cost of the system?
Do you propose a roof mount or ground mount system? What are the differences in cost, maintenance, space, etc…?
How much of my energy use would my solar system cover?
How much would my monthly energy bills be after installation?
How long would my payback period be on my solar system? What are the key assumptions associated with my payback that may impact that result?
How will solar affect my homeowner’s insurance?

If my energy use changes, will I be able to add more panels later?
Will I need a new roof for any reason to install and utilize these solar panels i.e. weight?
If these panels or the installation damage my property, who is responsible?
In which country are the solar panels and inverters you are selling made?
What kind of warranties do the solar panels and inverters have? When does equipment typically need to be replaced?
How long will the installation take?

When was your company established and how much solar has it installed to date? (Ask for references.)
Does your company have a standard insurance certificate with adequate general liability coverage of $1 million or more? (Ask to see it)
Does your company have professional liability insurance? (Ask to see it)
Are your solar installers North American Board of Certified Energy Practitioners (NABCEP) Solar Photovoltaic (PV) Electric trained and certified?
Do you have a licensed professional engineer and master electrician on staff to review and approve drawings, obtain permits, and supervise electrical work? Will you handle that paperwork?
Are you accredited with the Better Business Bureau? If so, what is your rating?
Will you complete all of the paperwork associated with financing, tax credits, and/or grants? Does that cost extra?
Do you work with any affiliated companies or sub-contractors?
Do you offer any warranties or guarantees on your installation work?