What the Changes to California’s Self-Generation Incentives Mean to Energy Storage

Share Button

Energy storage gets a big nod under recent changes to California’s self-generation incentives, which also place new emphasis on reducing greenhouse gas emissions.

The California Public Utilities Commission approved the revisions to the self-generation incentive program (SGIP) on June 23.

Under the changes, 75 percent of the funding goes to energy storage, said Matt Roberts, executive director of the Energy Storage Association.

“There was positive change on two fronts: allocating more money to storage, recognizing its greater greenhouse gas reduction benefits; and making it a more competitive system based on the actual performance of the systems, increasingly focused on greenhouse gases,” he said.

The annual budget for the program is $77 million, with 75 percent going to storage and systems tied to renewable energy generation given priority, according to Navigant Research. The remaining 25 percent of the funding will go to generation systems that include wind turbines, gas-powered microturbines and fuel cells.

“There was a systematic change to how monies are allocated,” said Roberts.  “Before it was first-come, first-serve. Now it’s a lottery. All the submissions come in on the same day, and will be put into buckets based on their performance,” he explained.  “In addition, now funding is based on the greenhouse gas reduction of your proposals.”

Before the change, a cat fight

Before the change, the reservation process happened once a year and everyone was on their computer to obtain a reservation, which was a “cat fight,” said John Sarter, CEO and founder of developer Off the Grid Design, whose nanogrid project, Sol-Lux Alpha, received funding through the program. Like others involved in the process, he was concerned about the fact that single companies got a big share of the monies. Under the changes, no developer can be awarded more than 20 percent of the monies, according to Navigant Research.

“These incentives are critical; they are why we did as much storage as we did,” said Sarter.
The goal of having the rates decrease gradually each year is to get more projects online, Roberts explained. “There is an incremental step down that will take place. That will make the money go farther and get more systems installed,” he said.

Under the changes, the CPUC set separate incentive rates for systems that are also receiving the Investment Tax Credit, according to Navigant. The initial rate for storage systems not receiving the ITC is now set at $0.50/Wh and at $0.36/Wh for systems that do receive the ITC. Under the changes, all residential storage systems get the full $0.50/Wh incentive, according to Navigant.

“If I’m reading this correctly, this means that the incentive ($ per watt) will equal the Energy Storage System’s true full capacity,” said Sarter. “Currently the incentive is paid out at the average system output over at two-hour period, which effectively cuts the incentive in half (this is how PG&E is interpreting it, anyway.) This is a huge change and benefit to SGIP recipients.” He said he plans on looking into whether the changes could apply to his system retroactively.
Few incentives for home storage

Roberts noted that it’s now difficult to get value out of residential storage systems. “There a lot of untapped potential on the residential side; we see cool energy monitoring technology, which tells you what your appliances are doing, but you can’t act on it other than unplugging the appliances.”

Residential storage systems allow residential customers to change their load profile, but there are few utility incentives that reward customers for doing that, he added.

As for the larger systems, the SGIP has helped get more projects into the field and drawn attention to their benefits, Roberts said. “Now that we’re starting to realize that value, we’re trying to refine the system so we get more systems up and running.”

Free Resource from Microgrid Knowledge Library

Microgrid as a service Maas
Designing Microgrid-as-a-Service Agreements Requires State of the Art Design Methods
Introducing the MaaS business model into what is already a complex system requires more than simple spreadsheet calculations. You need to use comprehensive mathematical optimization techniques to model energy systems, while also considering optimized dispatch results, to capture the most accurate simulations.
We always respect your privacy and we never sell or rent our list to third parties. By downloading this White Paper you are agreeing to our terms of service. You can opt out at any time.

Get this PDF emailed to you.

The changes to California’s self-generation incentives are detailed here.

Read about energy storage in microgrids by subscribing to the Microgrid Knowledge newsletter. It’s free.
Share Button


  1. The fluctuating voltage of utilities’ grid could be harmful for electric motor, computer etc. It will be more important to install power storages to cut the peak voltage and to absorb the higher energy of wind generator.