I have lived this one. Panels on the roof, payments leaving the account every month, and production numbers that are nowhere near what was drawn up in the proposal. Underperformance alone is not automatically a legal claim, but it is very often the visible symptom of one.
Separate the three causes
Underproduction usually traces to one of three things, and the claim depends on which:
- The design was wrong: shading, orientation, or an undersized array that could never hit the projection.
- The installation or equipment is defective: dead strings, failed optimizers, inverter faults, or monitoring that was never activated.
- The projection itself was inflated to close the sale, regardless of what the roof could ever deliver.
What a production guarantee actually promises
Read the guarantee clause carefully. Many are measured over a full year, apply a wide tolerance band, require you to submit a written claim within a specific window, and cap the remedy at a cash credit for the shortfall rather than repair or removal.
Those limits matter, but they also cut the other way: when the company never activated monitoring, never responded to your claim, or no longer exists to honor it, the guarantee has been breached on its own terms.
Building the proof
The strongest underproduction files pair the original proposal's kilowatt-hour estimate against actual monitoring data and utility bills across at least twelve months. Screenshots of the monitoring portal matter, because access is often revoked when a dispute starts.
Add the service tickets, the dates you reported the problem, and every response you did or did not receive. Silence from the installer is evidence too.
The short version
Save your proposal, export your monitoring data now, and keep twelve months of utility bills. That combination is what turns frustration into a provable claim.
This article is general information about Texas law and is not legal advice. Reading it does not create an attorney-client relationship with Ray Law Group PLLC. Outcomes depend on the facts and documents in each matter, and legal deadlines apply.