Payment Processing for Solar Installers in San Francisco

Solar installers' payment processing in San Francisco has changed along with the economics of the product. Since NEM 3.0 took effect in April 2023, export credits for new systems dropped and the sale shifted from panels alone to panels plus battery storage, which raised the typical contract from the low tens of thousands into a range where a single dispute is a serious loss. Installers working the city's Sunset and Richmond rowhouses, Bernal and Noe Valley flats, and the multifamily and commercial roofs south of Market face a permit process that is slow, a customer base that is sophisticated and litigious, and a payment structure that California law dictates more than most contractors realize.

The CSLB rules that shape your invoices

Solar installers hold C-10 or C-46 licenses and their residential work is a home-improvement contract under CSLB rules. That means a deposit cap of 10% of the contract price or $1,000, whichever is less, and progress payments that cannot exceed the value of work performed. California also requires the CPUC's Solar Consumer Protection Guide to be provided and acknowledged before contract signing on residential systems, and residential customers have a three-day right to cancel. Confirm the current versions with counsel, but the practical point is that your payment schedule is regulated and your processor should make it easy to follow.

A milestone schedule that fits the rules

1. Deposit at signing, within the cap, by card or payment link
2. Progress payment at permit approval or equipment delivery, by ACH
3. Progress payment at mechanical completion, by ACH
4. Final payment at permission to operate from PG&E, by ACH or card

Card fees on a $45,000 system run into four figures. ACH at a flat fee with 1-3 business day settlement is the obvious rail for progress payments, and most homeowners paying cash for solar prefer it. For homeowners using financing, the lender pays you directly and your processing volume is only the deposit and any change orders.

Financing partners and PACE

Most San Francisco residential solar is financed through third-party loans, leases, or power purchase agreements, so a large share of installer revenue never touches a merchant account. That is fine, but underwriters will want to understand the split. PACE financing exists in California but has been heavily restricted after consumer-protection problems; check the current rule and your county's program status before offering it. The processing risk that remains is the deposit and change-order volume on cards, which is small in dollars but concentrated in disputes.

Why solar sees chargebacks

Solar is a long-timeline product sold in the home, often by commissioned reps, with performance expectations that take a year to verify. That produces disputes:

• Permit delays stretch past the customer's patience and they dispute the deposit as "not received"
• Production falls short of the pitch and the customer claims "not as described"
• A change order for a panel upgrade or a roof repair is disputed because it was verbal
• Post-NEM 3.0 bill savings disappoint and the customer wants out

The defenses are documentary: a signed contract with the production estimate and its assumptions, the Consumer Protection Guide acknowledgment, signed change orders, dated site photos at each milestone, and a descriptor on the cardholder statement that matches your company name. Solar is not a high-risk MCC, but a ratio approaching 0.9%-1% draws network monitoring like any other business, and a few disputes in a slow month get you there.

Underwriting a solar installer

Bring your CSLB license, bond, formation documents, bank statements, a sample contract, and your financing-partner list. Describe average and maximum ticket honestly, including the largest cash-pay commercial job you expect. Underwriters will look for the deposit cap in your contract; an installer whose sample contract asks for 30% down is flagged immediately.

Commercial and multifamily work

Commercial solar and storage on SoMa buildings, Mission District apartment blocks, and Bayview warehouses is B2B, with progress billing on larger amounts and property-owner accounts-payable departments that prefer ACH or wire. Invoicing with payment links that offer ACH by default and card as an option keeps fees down and gives the customer a clean record. Some installers also accept stablecoins from commercial clients, which settle instantly to the merchant wallet and carry no chargeback path.

Cash flow and the permit timeline

San Francisco permitting and PG&E interconnection can take months, and your cash is tied up in equipment. Cards settle in 1-2 business days and ACH in 1-3, so the payment rail is not the bottleneck; the milestone schedule is. Structure milestones so equipment delivery triggers a payment, and use a processor that pushes settled payments into QuickBooks so job costing stays current.

Solar installation in San Francisco is a regulated, high-ticket, long-timeline business. Take the small deposit the law allows, move the rest to ACH on documented milestones, and keep the paperwork that answers every dispute before it is filed. The installers who do that spend their energy on roofs, not on chargeback responses.