Fresno’s Water Plant Solar Array Beats Forecasts, Promises $122M in Savings Through 2045
A new solar installation at Fresno’s Northeast Surface Water Treatment Plant is already producing more electricity than expected — 101% of projected output since it came online in late March — and could save local ratepayers more than $122 million by 2045.
The system has generated 862 megawatt-hours for the city so far, using a simpler ground-level design that skips the steel racking structures typical of large solar projects. ForeFront Power brought the project into commercial service under a fixed-price 20-year power purchase agreement that may deliver electricity to Fresno at rates lower than what the city would pay utilities.
The array is one piece of a three-site clean energy program across Fresno’s municipal water facilities. Together, those locations will provide 27 megawatts of solar capacity and include battery storage.
ForeFront Power senior project manager Erinne Davis said the Northeast site was well-suited to this approach because avoiding expensive construction work reduced the risk of delays or budget overruns. The design can handle slopes up to 15%, so the site didn’t need major reshaping.
The technology, called Earth Mount Solar by manufacturer Erthos, places photovoltaic panels directly on the ground instead of on elevated steel frames. That cuts steel costs and site-prep expenses, and it allows more generating capacity per acre by eliminating the usual gaps between panel rows.
The system also uses automated cleaning — a robot called ErthBot that runs a dry nylon brush over the panels at night, then returns to its charging dock during the day. Each unit can maintain over 3.5 megawatts of solar capacity, cutting down on repetitive manual labor.
The Breakdown
- The solar array at Fresno’s Northeast Surface Water Treatment Plant came online in late March and has since generated 862 megawatt-hours at 101% of expected output.
- The project is part of a three-site municipal water program providing 27 megawatts of solar capacity and battery storage.
- ForeFront Power entered a fixed-price 20-year power purchase agreement with the city, projecting over $122 million in savings for local ratepayers by 2045.
- The design places solar panels directly on the ground without steel racking, reducing construction and material costs while increasing energy density per acre.
- Automated cleaning technology (ErthBot) maintains the panels at night, lowering long-term maintenance costs.
What This Means for You
This project represents Fresno’s city government locking in solar electricity prices for the next 20 years through a fixed-price power purchase agreement. The city projects this could cut electricity costs by over $122 million by 2045 compared to what ratepayers would otherwise pay for utility electricity.
The technology choice also matters: by using a simpler, cheaper design that still meets (and exceeds) performance targets, the city’s approach could become a model for other municipalities looking to cut energy costs without the upfront expense of traditional solar installations. For voters weighing how the city spends public money and manages long-term infrastructure, this is an example of a procurement decision with a stated, quantifiable payoff.
What to Watch
The $122 million savings figure is a projection over 20 years based on the city’s fixed-price agreement potentially undercutting future utility rates. The actual financial outcome will depend on how utility electricity prices change over the contract period and whether the solar array continues to perform at or above its current 101% of expected output.
The system uses automated cleaning technology and ground-level panels designed to reduce ongoing maintenance needs. The project’s long-term cost-effectiveness will become clearer as the installation operates over the course of its 20-year power purchase agreement.
