Santa Barbara’s public faculty system is finalizing a photo voltaic microgrid venture that would set a mannequin for funding in clear backup energy.
Purveyers of carbon-free backup energy have struggled for years to persuade prospects to pay for resilience. However a novel design will save the Santa Barbara Unified College District appreciable quantities of cash whereas creating resilience for vital infrastructure within the face of California’s many and various calamities. All of this requires no upfront buy by the colleges, and shields them from monetary danger if the system doesn’t carry out.
“We are able to carry solar-driven resilience to vital neighborhood services, and admittedly to any services,” stated distributed vitality advocate Craig Lewis, government director of the Clear Coalition, which helped design the venture. “We are able to do this whereas offering invoice financial savings to the websites if the tasks are giant sufficient.”
The venture is very related for California, which enacted supportive insurance policies for photo voltaic and battery storage, and the place earthquakes, wildfires and mudslides frequently threaten the conventional functioning of the electrical energy system. However the architects of the deal imagine the idea may simply translate to different states with pronounced resiliency wants.
How does it work?
Santa Barbara could also be identified for righteous shore breaks and recent, creamy sea urchin, however the coastal metropolis has had its brushes with calamity.
The Thomas Hearth burned for weeks within the mountains above city in December 2017 and into 2018, adopted by heavy rains that triggered a lethal particles circulate. The colleges served as protected havens throughout that point, as a result of their energy provide occurred to stay intact. “It clicked,” stated SBUSD Board President Laura Capps: for the colleges to reliably play that position, their electrical energy entry couldn’t be left as much as the weather.
The Santa Barbara Unified College District held a request for proposals earlier this yr to construct a sequence of photo voltaic installations and solar-battery microgrids. The installations would enable key services to proceed working by means of an outage, in order that colleges can maintain feeding the scholars who rely upon breakfast and lunch, and keep communications.
International vitality big Engie received the contract by means of its public sector vitality options division. Engie has been constructing public sector microgrids for years, and counts 57.9 megawatt-hours of customer-sited battery storage put in across the nation. Engie is finalizing its designs for last approval by the SBUSD Board later this yr.
Engie plans to put in photo voltaic at 14 areas; it can additionally set up battery-power microgrids at three excessive colleges, one junior highschool, and the district workplace and services upkeep warehouse. Throughout regular instances, the photo voltaic ought to cowl the colleges’ vitality wants. The batteries will cycle to keep away from time-based charges and demand costs. These financial savings make the venture enticing for a faculty district.
Photo voltaic will generate energy throughout the college district’s portfolio, whereas the bigger services will function resilient microgrids. (Graphic courtesy of Engie)
“There’s more cash for the classroom, the more cash we save exterior the classroom,” Capps defined.
If energy goes out, the batteries assure operations indefinitely for a particular set of vital operations; if further vitality is accessible, they’ll maintain different elements of the buildings on-line too.
“Every thing is sized for the worst photo voltaic day,” Lewis stated. “Even on that day, there’s going to be sufficient photo voltaic and storage to offer the resilience requirement.”
The college district pays Engie through an influence buy settlement for 28 years — the long-term certainty helps carry down the price. Engie will set up and personal the tools, whereas guaranteeing efficiency from the photo voltaic mills and invoice financial savings from the batteries.
Why it’s revolutionary
The RFP course of, designed and run by Clear Coalition and clear vitality engineering agency Sage Vitality Consulting, developed a classy technique for valuing resilience. It breaks down all the assorted faculty constructing masses into a transparent hierarchy, and determines which masses want full-time help, which of them must be backed up more often than not, and which of them are good to have if there’s vitality to spare.
However maybe probably the most hanging side of the deal is that it pencils even with out factoring that in, merely on the idea of money saved from utility payments.
“Over the lifetime of the venture, the college district will certainly be saving cash in comparison with a business-as-usual, follow the utility method,” stated Dana Coe, who helped craft the design as senior venture supervisor at Sage.
That assertion requires just a little parsing. Coe stated “over the lifetime of the venture” as a result of the college district opted for a flat charge PPA. The result’s the primary few years will see a modest improve in vitality worth in comparison with right this moment, however the colleges can be insulated from utility charge hikes sooner or later. Even conservative estimates present it can lower your expenses because the years go on.
Had the college opted for simply photo voltaic, it may have saved extra cash, however this setup lacks a protection in opposition to outages. The microgrid additions add value to the venture, however the financial savings greater than pay for the backup performance.
“They’re getting a luxurious automobile for an financial system automobile worth,” Coe stated.
That is a marked break from the previous, when the “luxurious automobile” of unpolluted backup energy solely got here at luxurious costs.
However does it scale?
California’s excessive utility charges, time-based charge construction for photo voltaic prospects and native incentives make it a beautiful state to strive one thing like this. However related situations exist elsewhere.
“It might probably definitely increase past the borders” of California, stated Russell Schmit, Sage’s chief working officer. He stated it may work in Hawaii and elements of the Northeast that worth resilience, like Lengthy Island or coastal Maine.
Courtney Jenkins, vice chairman of Engie’s regulatory, organizations and mobility enterprise, agreed that related tasks may match properly in Hawaii and the East Coast.
“They’re constructing this nationwide mannequin for the way we have a look at microgrids as a type of proactive resilience,” she stated of the Santa Barbara colleges. “I anticipate we’ll see extra on this vein.”
Jenkins famous, although, that long-term partnerships like this 28-year PPA work higher for presidency and non-profit prospects. Business prospects are usually not considering locking down such a prolonged dedication.
One other essential ingredient is a buyer that’s prepared to look past the simple financial savings from standalone photo voltaic.
“Anybody can throw collectively a financial savings evaluation for a photo voltaic system nowadays,” stated Engie venture supervisor Sophie Fallon. Justifying the extra expense of the microgrid may be difficult, and parsing vital and non-critical masses is sophisticated. However doing so opens up values a buyer cannot get from photo voltaic by itself.
Scale issues, too: In Santa Barbara, 14 buildings will produce photo voltaic technology, thereby rising financial savings for the portfolio. It didn’t, nevertheless, make sense to place batteries on all of them at right this moment’s costs. That’s only a snapshot of the market: if battery prices drop, or new market mechanisms compensate distributed vitality for its providers to the grid, the addressable market will increase, Clear Coalition’s Lewis famous.
Clear Coalition is trying to export this mannequin to the encompassing area, identified in grid planning phrases because the Goleta Load Pocket. The steep Santa Ynez mountains isolate the coastal plain from the remainder of the grid; guaranteeing reliability from the skin, within the face of earthquakes or wildfires, requires costly infrastructure investments. However Clear Coalition has calculated that constructing 200 megawatts of photo voltaic capability and 400 megawatt-hours of storage within the space would enable it to maintain functioning even when a catastrophe cuts off the broader grid.
If the college district’s method catches on, it may encourage copycats within the neighborhood, in addition to throughout the continent.