Most solar company red flags are visible before you sign anything — if you know what to look for. This guide covers 10 specific warning signs that a solar company may not deliver what it promises, along with what to do when you encounter each one.
The 10 Red Flags
No Verifiable Physical Office
A legitimate solar installer operating in your area should have a verifiable business address. Search the address on Google Maps and confirm it exists as a real business location, not a virtual office or residential address. Companies without physical offices may disappear quickly if problems arise after installation.
Poor Review History Across Multiple Platforms
A pattern of complaints across Google, Trustpilot, and the BBB — particularly complaints about post-installation support failures, unresolved damage, or billing disputes — is the most predictive signal available. The multi-platform pattern distinguishes genuine complaint history from competitor sabotage.
Frequent Company Name Changes
Search for the company’s history and any previous names. Some solar companies operating under new names are simply prior complaint-heavy operations rebranded to reset their review history. A company that has operated under the same name for several years in the same market is lower-risk than a recently named entrant.
Unrealistic Savings Claims
"We’ll eliminate your electricity bill entirely." "You’ll see a 100% offset." These claims are almost never accurate. A typical residential solar system offsets a significant portion of electricity usage, but factors like roof orientation, shading, and seasonal variation mean full offsets are rare. Proposals citing unrealistic savings should be verified against your actual utility usage data.
Lack of License Information
Solar installers must be licensed contractors in most states. Any company unwilling or unable to provide their state contractor license number should not be considered. Verify the license independently at your state contractor licensing board website.
Subcontracting Without Disclosure
Some solar companies sell systems but subcontract all installation work to third parties. This isn’t inherently problematic, but it should be disclosed. Ask directly who will perform your installation. If it’s a subcontractor, ask for that company’s name and license so you can verify them separately.
Vague Equipment Specifications
A reputable solar proposal specifies the panel brand and model, efficiency rating, inverter brand and type, and system size in kilowatts. A proposal that describes equipment only in generic terms like "high-efficiency panels" or "premium inverters" without naming manufacturers is preventing you from verifying what you’re actually purchasing.
Pressure to Sign Before Getting Competing Quotes
"This offer is only available if you sign today." "Getting other quotes will just delay your installation." Both are pressure tactics designed to prevent the comparison shopping that would reveal whether the offer is competitive. Any legitimate offer will still be available after you have gotten two or three competing quotes.
Warranty Language That Depends on Company Survival
A workmanship warranty is only as good as the company backing it. Ask what happens to your warranty if the company goes out of business. Some financing arrangements through third-party lenders include warranty transfer provisions; most installer-only warranties do not. This is a particular risk with newer or smaller companies.
Refusal to Provide References
Ask for references from customers in your area who installed the same system type at least two years ago. Companies with a genuine track record of satisfied customers will provide these without hesitation. Reluctance or inability to provide local references is a meaningful signal about actual customer satisfaction.
How to Check Any Solar Company in 5 Minutes
🔍 State Licensing Board
Search your state contractor licensing board for the company name or license number. Confirm active license status, no disciplinary actions, and adequate insurance on file.
📊 BBB Profile
Check the BBB rating and complaint history at bbb.org. Look for unresolved complaint patterns and the company’s response behavior, not just the letter grade.
⭐ Multi-Platform Reviews
Read Google, Trustpilot, and any solar-specific review platforms. Look for complaints about post-installation support, damage, and billing — these are the most predictive categories.
🏢 Physical Address Verification
Search the address on Google Maps. Confirm it’s a real business location that’s been there for some time, not a virtual office or a mailbox address.
Frequently Asked Questions
Should I only use local solar companies?
Not necessarily — but proximity to a physical office and established local presence do reduce post-installation support risk. National solar companies can be reputable, but verify that they have a local service presence rather than relying on remote support or subcontractors for all post-installation work.
Is it a red flag if a solar company is new?
Newer companies can be reputable, but they carry higher risk for warranty and support continuity because the solar industry has significant company turnover. If you consider a newer company, ask specifically about third-party warranty backing and what happens to your warranty if the company closes.
🔍 Compare Solar Companies
Read verified reviews for every major solar installer on ConsumersVerified.