B2B Solar Financing: How to Fund Commercial Solar Projects in 2026

Commercial solar projects require sophisticated financing structures. In 2026, many businesses are moving away from direct cash purchases toward high-leverage options that preserve capital.

1. C-PACE (Commercial Property Assessed Clean Energy)

C-PACE allows businesses to finance solar as a property tax assessment. The loan stays with the property, not the owners, and offers long terms (up to 20 years) with competitive rates.

2. Solar PPAs (Power Purchase Agreements)

With a PPA, a third party owns the system and sells you the power at a discounted rate. This allows for $0 upfront cost while still benefiting from immediate utility savings.

3. Accelerated Depreciation (MACRS)

One of the strongest B2B incentives is the ability to depreciate solar equipment quickly, significantly reducing taxable income in the first few years of operation.