What commercial solar installation covers
A commercial solar system typically includes rooftop or ground-mounted panel arrays, string inverters or microinverters depending on shade conditions, monitoring infrastructure, electrical service tie-in (which often requires service panel or transformer work for larger systems), and optional battery storage. For larger installations, structural engineering and geotechnical analysis are part of the scope.
Our work covers all of that plus permitting, utility interconnection (which is significantly more involved than residential), state contractor coordination, and post-installation monitoring. Most commercial projects also require a financial modeling stage where we run the IRR and payback calculations under several scenarios so you can decide which financing path makes the most sense.
Why commercial solar works in this market
The Central Valley has three things in abundance: sun, electric load, and underutilized commercial roof space. Warehouses sit on enormous footprints. Retail strips have large flat roofs. Ag packing facilities run heavy refrigeration loads year-round. Each of those produces a substantial monthly utility bill, and a substantial solar opportunity.
Commercial systems also unlock incentives that residential systems can't access on their own. The federal commercial Investment Tax Credit is still active through 2032 according to the IRS Investment Credit guidance. Modified Accelerated Cost Recovery System (MACRS) depreciation lets you depreciate the system over 5 years, which dramatically reduces taxable income in the early years. For ag operations, USDA REAP grants can cover an additional 25 to 50% of system cost.
Propel Financing for commercial
Propel by Concert Finance also handles commercial installations. The structure is similar to residential: Concert Finance owns the system commercially during the early years, captures the tax incentives, and passes savings through to you as a discounted purchase price. For business owners who don't want to deal with the tax credit paperwork themselves, this is often the cleanest path. Full Propel breakdown.
Agricultural solar across the Valley
Agriculture is a huge piece of what we install. Almond ranches, dairy operations, citrus, grapes, vegetables, irrigation pumping, cold storage, and processing facilities all run substantial year-round electric loads. Solar offsets that load cleanly, and the math is even better than commercial because the USDA REAP program provides grants and loan guarantees specifically for rural energy projects.
Common ag solar projects we handle:
- Ground-mount arrays on unused acreage or alongside existing structures
- Rooftop systems on packing facilities, cold storage, and equipment barns
- Pump-house mounted systems for irrigation wells (especially common in Tulare and Fresno counties)
- Battery storage for operations that need backup power during PG&E outages or PSPS events
The commercial tax credit and MACRS depreciation
The federal Investment Tax Credit for commercial solar is 30% in 2026, with bonus credits potentially available for projects meeting domestic content or energy community requirements. Unlike the residential ITC that ended in 2025, the commercial credit runs through 2032 under current law.
MACRS depreciation is a separate benefit on top of the ITC. Solar equipment qualifies for the 5-year MACRS schedule, meaning you can depreciate the bulk of the system cost on your tax return in the first 5 years, which dramatically reduces taxable income during that period. The Department of Energy's commercial solar tax credit guide walks through the math in detail.
The combined effect is significant: after applying the ITC plus 5 years of MACRS depreciation, the effective net cost of a commercial solar system is typically 50 to 60% of the gross system price. That's before counting any state-level incentives or utility rebates. The DSIRE database lists every current state and local commercial solar incentive that may stack with federal benefits.
What commercial solar costs and pays back
Commercial systems are typically priced per watt rather than per system, because sizes vary widely. Most commercial installations in this region run between $1.80 and $2.80 per watt installed before incentives, depending on system size, mounting type (rooftop vs ground-mount), and electrical service complexity. After applying the commercial ITC and MACRS depreciation, the effective net cost typically drops to $1.00 to $1.50 per watt.
Payback period for commercial systems typically lands between 4 and 7 years depending on utility rates, system size, and whether storage is included. After payback, you have another 18 to 21 years of essentially free electricity production. The Solar Energy Industries Association research tracks national averages, but California commercial typically performs at the better end of the range.