Solar Energy World Reviews, Services and Costs (2024) – MarketWatch

We closely evaluate solar installation companies with a focus on the factors most important to homeowners like you. We based our solar company methodology on input from multiple homeowner surveys, discussions with industry experts and research into the renewable energy market. Our review process involves assessing each company on the following criteria, which we then use to calculate a rating out of 5 stars.

• Cost and payment options (20 points): Cost is one of the most important factors when installing a solar energy system. Solar providers that offer cash purchases and in-house loan financing earn full points in this category. Companies also receive bonus points for offering solar panel leasing or power purchase agreements (PPAs).
• Services (20 points): In addition to solar installations, companies offering backup battery and electric vehicle charger installations, energy efficiency audits and system monitoring earn the most points in this category. Companies can also receive points for completing installations in-house, as opposed to using third-party contractors.
• Reputation (20 points): To assess the reputation of each company, we consider Google star ratings, Better Business Bureau (BBB) scores and reviews, and NABCEP certification status. We also look at customer complaint rates on sites like the BBB and weigh how the company responds.
• Warranty (15 points): We verify that each company offers workmanship, product and performance warranties on all of its solar installs. A provider earns more points for extending warranties that meet or exceed industry standards, including 10 years for system workmanship and products and 25 years for panel performance.
• Customer Support (10 points): Solar companies that offer virtual consultations, a mobile app, 24/7 customer support and high customer satisfaction with backend support earn the most points in this category.
• Industry Experience (10 points): Providers with 10 or more years of experience in the solar installation industry earn a perfect score in this category.
• Sustainability (5 points):To measure sustainability, we assess each company based on whether it shares a detailed sustainability statement or ESG disclosures on its website. We also conduct research to see if companies offer end-of-life panel disposal programs or have eco-friendly community partnerships.