Published June 8, 2026 · Updated June 8, 2026 · 7 min read
The short answer
For California businesses in 2026, commercial solar targets demand charges as much as energy use, and the federal §48E commercial tax credit remains available through roughly 2027 (a key difference from the expired residential credit). Multifamily and agricultural properties have their own opportunities. The right design depends on your rate structure, load profile, and roof or land.
By Vinnie Curcie, Founder & CEO
Commercial solar isn't just bigger residential
Businesses are billed differently than homes, so commercial solar is designed differently. Commercial rate plans often include demand charges — fees based on your single highest spike of power use in a billing period — on top of standard energy charges. That changes the goal: a commercial system (often paired with storage) aims to shave those expensive demand peaks, not just offset kilowatt-hours. The right design starts from your specific rate structure and load profile.
Demand charges: the hidden cost solar can target
For many California businesses, demand charges are a large and frustrating share of the bill because they're driven by brief usage spikes rather than total consumption. Solar reduces energy charges during daylight hours, and battery storage can discharge to flatten demand peaks — cutting the demand-charge component the panels alone can't reach. Understanding your demand profile is central to designing a commercial system that actually moves your bill.
The §48E tax credit still applies to businesses
This is a key 2026 distinction: while the residential §25D tax credit expired December 31, 2025, the federal §48E commercial clean-electricity investment credit remains available for business systems through roughly 2027. That's the same credit that underpins residential lease/PPA economics — and for a business that owns its system, it can be claimed directly. Tax treatment depends on your specific situation, so confirm the details and timing with a qualified tax professional before relying on them.
Multifamily and property-owner angles
Apartment buildings, condos, and other multifamily properties have their own considerations — common-area loads versus tenant meters, and programs designed for multifamily and affordable housing. For property owners, solar can offset common-area energy costs and demand charges and serve as a building amenity. The right structure depends on how the property is metered and who pays which portion of the electricity, which we work through case by case.
Agricultural solar
California farms and agricultural operations often have large, steady loads — irrigation pumps, processing, refrigeration — and the land or large roof space to host a sizable system. Agricultural solar can offset those heavy operating loads and hedge against rising energy costs over a long horizon. As with any commercial project, the design follows the operation's load profile and rate plan rather than a generic template.
How OC Solar approaches commercial projects
Every commercial project starts with your actual usage data, rate structure, and demand profile — then we design solar and, where it pays, storage to match. Handling solar, storage, and electrical work in-house keeps a multi-trade commercial job coordinated under one accountable company. We've served Southern and Central California since 2016 under CSLB #1023627, and we'd rather build a design grounded in your real numbers than quote a generic package.
FAQ
Yes. Unlike the residential §25D credit, which expired December 31, 2025, the federal §48E commercial investment credit remains available for business systems through roughly 2027. A business that owns its system may claim it directly — confirm the details and timing with a qualified tax professional.
Incentives and rates change. This page is kept current — but always confirm specifics for your home.
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