Mid-Summer Solar Check: Why Dirty Panels Are Costing Central Valley Growers Big

Don’t let dust, heat, and assumptions reduce your solar ROI during peak energy demand

Energy Use Is Peaking — Are Your Panels Pulling Their Weight?

It’s the middle of summer in the Central Valley — a time when farms are in full swing, irrigation is constant, and PG&E bills are climbing fast. With extreme heat and long hours of daylight, solar systems have the potential to generate peak power right now. But many growers aren’t seeing that full return, and the reason might be a simple one: dirty panels.

As power grids remain under pressure and utility costs rise, ensuring your solar is operating at full efficiency isn’t optional — it’s essential. And for many ag operations, that starts with mid-season cleaning and system checkups.

The Trend Is Clear — and So Is the Dirt

Solar systems are more visible than ever across ag land, school districts, and industrial properties. But visibility doesn’t equal performance. Kyle Espinola, Managing Partner of Watts Up Solar Cleaning, says expectations are high — and so are the costs of neglect.

“We’re seeing solar everywhere, and we’re also seeing the issues that come with poor upkeep,” he said. “A lot of customers think winter rain cleaned the panels, but it didn’t.”

Central Valley Dust Could Be Cutting Your Efficiency by 40%

In this climate, dust is more than just a nuisance — it’s a power killer. Kyle estimates that on average, systems that haven’t been cleaned recently are operating up to 40% below potential, with even greater losses in heavy ag areas.

“There’s more sunlight and more demand right now,” he explained. “That means more opportunity to generate power — but only if your system is clean and working properly.”

Smart Maintenance Means Smarter ROI

Watts Up Solar Cleaning helps growers monitor soiling levels and system performance in real time. By using data from O&M providers, they help customers understand when cleaning is due and how much energy (and money) they’re losing by waiting too long.

That kind of insight also helps prevent bigger issues, like underperforming tracking systems or weather-related wear that goes unnoticed during the winter.

Still Haven’t Checked Your System This Summer? Here’s Why You Should.

Kyle’s message to growers is simple: If you haven’t looked into your system this summer, you’re already behind.

“You’re missing out on offsetting high PG&E costs,” Espinola said. “Get after it — now’s the time.”

Make the Most of the Sun — Before It Costs You

As the season rolls on and harvest approaches, solar maintenance isn’t just about keeping panels clean — it’s about protecting your investment. In a time when energy costs are unpredictable and grid reliability isn’t guaranteed, every bit of power counts.

For growers looking to maximize production and keep utility costs in check, now’s the time to act. Learn more about tracking performance and scheduling cleanings with Watts Up Solar Cleaning.