Commercial Solar for Small Businesses: What to Check Before Signing

Quick answer: start with the business load, site control and utility tariff

Small-business solar is a facility energy project, not a scaled-up residential sale. Begin with at least 12 months of bills, available interval data, the exact rate schedule, operating hours, roof and electrical condition, property-control documents and a realistic occupancy horizon.

Then compare solar-only, solar-plus-storage and no-project cases with the same assumptions. A proposal should show what energy solar offsets, which demand and fixed charges remain, how exports are valued, who owns the equipment, and what happens if the roof, tenant or business changes.

Identify the account holder, building owner and decision rights

Record who owns the building, who pays each meter, who can authorize roof and electrical work, and whether a landlord, lender, property manager, tenant or insurer must consent. The party that benefits from bill savings may not be the party taking construction, tax or contract risk.

For leased space, align the solar term with the lease, renewal options and restoration obligations. Put roof access, shutdown coordination, casualty, assignment, sale, relocation, removal, end-of-term ownership and landlord approval in writing before engineering begins.

Use interval data instead of annual kWh alone

Annual kWh does not show when the facility sets its peak demand or how much solar it can use as produced. Compare interval data—often 15-minute or hourly readings—with operating schedules, seasonal loads and modeled solar output.

Ask for a base-year reconciliation that matches the utility bills. Document weather, planned equipment, electrification, growth, shutdowns and occupancy changes instead of hiding them inside one annual escalation percentage.

Separate energy, demand, facilities and fixed charges

Solar can reduce purchased kWh during sunny hours, but it does not automatically eliminate demand charges. A brief monthly peak outside solar hours can preserve much of a demand charge, while facilities, standby, meter and customer charges may follow separate rules.

Require a line-by-line before-and-after bill model. It should identify the demand interval, ratchet or facilities-charge history, time periods, minimums, non-energy charges and any standby treatment rather than presenting only a percentage savings claim.

Model the actual SCE or LADWP commercial tariff

For an SCE account, use the current rate and applicable Solar Billing Plan, export, standby and Rule 21 requirements for that project. Rule 21 covers CPUC-jurisdictional net-metered, non-export and certain other distributed generation interconnections; exporting and non-exporting configurations can follow different reviews.

LADWP is a municipal utility with its own rates, Net Energy Metering guidelines and interconnection process. LADWP urges non-residential customers to request a rate analysis because adding solar may change the rate and financial result. Do not copy an SCE model onto an LADWP bill.

Resolve roof, structure and future property work

Obtain roof-condition, structural and electrical reviews that address remaining roof life, loading, drainage, fire and maintenance access, HVAC conflicts, attachments, service capacity, switchgear and any transformer or utility work.

Price roof repair, replacement, removal and reinstallation separately. State who preserves the roof warranty, who pays for work caused by the array, where equipment can be staged, and how the business will operate during construction or later roof service.

Treat permits, interconnection and permission to operate as separate gates

The contract should name who prepares drawings, obtains local permits, submits the utility application, answers correction notices, funds studies or upgrades, schedules inspections, signs the interconnection agreement and secures permission to operate.

Installed equipment should not be assumed eligible to export or operate in parallel with the grid. For SCE, Rule 21 review can place a project on fast-track or detailed-study paths; LADWP uses its own application. Put schedule dependencies, upgrade allowances and cancellation rights around an uneconomic interconnection result in writing.

Compare cash, loan, lease and PPA structures on one scope

For a cash purchase or loan, separate the solar-only cash price, property work, finance charges, tax assumptions, operations and maintenance, insurance, replacement reserves and residual value. For a lease, identify scheduled payments, escalators, ownership and end-of-term duties.

A PPA generally charges for generated electricity under a long-term contract. Compare its starting price, escalator, minimums, production guarantees, curtailment, utility changes, roof work, buyout, assignment and early termination with ownership using the same load and tariff assumptions.

Verify 2026 federal tax timing instead of booking a guaranteed credit

As of October 26, 2026, the IRS describes the Section 48E Clean Electricity Investment Credit as a 6% base credit that can increase to as much as 30% when applicable prevailing-wage and registered-apprenticeship requirements are met. Other bonus, transfer and recordkeeping rules can apply.

IRS Notice 2025-42 says the new termination rule reaches applicable solar facilities placed in service after December 31, 2027 when construction begins after July 4, 2026, subject to the notice's definitions and exceptions. Storage, construction timing, prohibited-foreign-entity, domestic-content, labor, ownership and tax facts can change eligibility. Have a qualified tax professional verify the project before relying on any 48E amount.

Model a battery as a separate operating strategy

A battery may target demand management, time shifting, outage continuity or export control. These are different objectives. Document usable energy, continuous and starting power, reserve, cycling schedule, degradation, efficiency, controls and whether solar can recharge it during an outage.

Show solar-only and solar-plus-storage results separately. A demand-reduction forecast should state the dispatch logic and interval peaks it addresses; a resilience claim should list the actual backed-up loads, transfer design and expected operating duration.

Verify the contractor and every responsible company

Check the California contractor license by legal name and license number, including status and classification. Identify the entity selling, designing, installing, financing, monitoring, servicing and warranting the system; those roles may belong to different companies.

Match the contract name to the license and insurance documents. Require equipment models, substitutions, production assumptions, workmanship coverage, manufacturer warranties, service response, labor exclusions and roof responsibilities in writing.

Stress-test the business case before signing

Request a sensitivity table using lower production, changed operating hours, slower load growth, different export value, demand-charge persistence, interconnection upgrades, roof work, downtime and early sale or lease exit. Do not hide these risks inside one optimistic payback period.

Compare the same analysis horizon and discount or financing assumptions across options. Keep tax benefits outside the operating savings line so a tax result does not disguise a weak energy case.

Bottom line: approve a documented project, not a savings headline

A decision-ready package should contain bills and interval data, rate and export sources, load-production overlays, roof and electrical reports, the one-line diagram, permit and interconnection responsibilities, full cash and financed costs, contract exits, warranties and a tax memo or adviser confirmation.

If the proposal cannot show who pays, what charges remain, who controls the property, what the utility must approve and which assumptions drive the result, it is not ready for a small business to sign.

Frequently asked questions

Questions worth asking

• What records should a small business collect before requesting solar proposals?
• Can commercial solar eliminate demand charges?
• Does a tenant need landlord approval for rooftop solar?
• Do SCE and LADWP use the same commercial solar rules?
• Can a small-business solar project still qualify for the federal 48E credit in 2026?
• How do commercial solar loans, leases and PPAs differ?
• When can a commercial solar system operate or export to the grid?
• What should a small-business solar contract include?