Storage has moved from add-on to anchor. Here is how to build the muscle to develop and install commercial battery projects.

For most of the last decade, C&I solar installers treated battery storage as a value-add. That era is over. In 2026, storage is becoming THE DEAL at a growing share of C&I sites, and in high-demand-charge territories the battery often delivers more economic value than the PV array above it. Self-developing these projects, originating the customer, structuring the financing, and controlling the work through commissioning, is where the value sits.

The 3 forces driving the shift

1. Demand charges. For mid-to-large commercial customers, peak demand charges can run 30 to 70 percent of the monthly bill. A properly sized battery can shave peak demand by 20 to 50 percent, with total bill reductions of 10 to 20 percent typical once demand-charge management and time-of-use arbitrage are both modeled.

2. Resiliency. Reliability is what you do when the grid is up, and that is what VPPs compensate for. Resilience is what you do when the grid goes down, and there is currently no US market mechanism that pays for it as a service.

To read about the third force driving the shift to C&I energy storage, and to see the full article, visit solarbuilder.com.