SimpliPhi supplying energy storage to 1.4MWh of solar air-conditioning at Hawaii schools

Share on linkedin
LinkedIn
Share on twitter
Twitter
Share on reddit
Reddit
Share on facebook
Facebook
Share on email
Email
The cabinets in action, with SimpliPhi-branded storage in a bank to the left. Image: SimpliPhi.

US energy storage designer and manufacturer SimpliPhi Energy has installed a combination of solar PV and batteries to power air-conditioning units at a school in Hawaii, with a further 1.4MWh of such projects in the pipeline.

In May 2016, Hawaii State’s Department of Education (HIDOE) brought into legislature a commitment to add air-conditioning to 1,000 classrooms across Hawaii, with the US$100 million Heat Abatement Program for public schools created to fast-track projects. The 1,000 classroom goal was reached in August, but the programme continues to add new units.

According to HIDOE, many of its schools are more than 50 years old and were never designed with the kind of electrical load needed to run air-conditioning in mind. A HIDOE fact sheet on the Heat Abatement Program says that the department annually spends US$48 million on electricity and cited the example of one school’s new AC-unit and said that it doubled power costs at Pohakea Elementary School.

Solar-plus-storage has now been put forward as an economical solution to power those air-conditioning units, allowing schools to control the long-term costs of their energy. Waialua High and Intermediate School, on the island of Oahu, is now being fitted with a system designed by Ameresco Solar, a developer and designer of PV systems headquartered in Arizona. Ameresco and SimpliPhi worked with local solar system integrator Haleakala Solar to execute the project.

“Bringing sustainable cooling relief to students in Hawaii was a problem we knew required innovation on several levels, including how to manage the up front and long-term costs of these systems and how to work with the limited electrical infrastructure on these campuses,” Ameresco senior account executive Richard Dean said.

Image: Hawaii Department of Education.

Modular design fitted to individual classrooms

Dean explained that the system was designed with power generation and energy storage housed in cabinets that serve one or two classrooms each, with cabinets located “right next to the electrical load”. Each of those cabinets houses either seven or 10 SimpliPhi PHI 3.4kWh batteries that can power between two and four tonnes of air-conditioning respectively.  

“This is a major cost advantage over a centralised system, as is the power system's ability to expand as future energy needs change,” Dean said, adding that SimpliPhi’s non-toxic battery systems was “essential… as we can simply add more batteries in the system without duplicating other aspects, unlike with the other storage options available on the market”.

Haleakala Solar boss Jim Whitcomb said SimpliPhi batteries were “proven to be reliable and safe from fire when installed outdoors in the full Hawaiian sun – without the hassle of adding separate AC or cooling mitigation”.

SimpliPhi claims its non-toxic lithium ferrous phosphate cells have eliminated the threat of thermal runaway from energy storage batteries, with CEO Catherin Von Burg saying of the Hawaii schools projects, where some batteries will be within five feet of the nearest student: “Safety is paramount and should not be negotiable for anyone; especially our children.”

With the highest penetration of solar PV per capita among US states and high electricity costs, Hawaii has rapidly become an advanced market for solar-plus-storage. SimpliPhi, which has a background in providing battery-backed off-grid energy solutions to movie productions, is pushing hard into Hawaii. The company launched a ‘plug and play’ residential energy storage system to the Hawaiian market first in August 2016, having collaborated on its development with Hawaii-based solar installer Apex Electric on product development. The company says that following the Waialua High and Intermediate, it has a further 1.4MWh of similar solar-plus-storage air-conditioning systems to fit at Hawaiian schools.

Read Next

May 23, 2022
The German utility scale storage revenue stack for new projects has been totally reshaped by recent events and regulatory changes as the market moves to 100MW-plus ticket sizes, local developer ECO STOR told Energy-Storage.news.
May 23, 2022
London-listed solar and storage investor Bluefield Solar Income Fund has acquired two 40MW battery energy storage system (BESS) projects for £4.5 million (US$5.7 million).
May 20, 2022
French renewable power producer and developer Akuo Energy has commissioned a 29.2MWh battery energy storage system (BESS) in Tonga, several weeks after powering up a 19MWh project in Martinique.
May 20, 2022
Microinverter and home energy storage system supplier Enphase Energy has “relatively good availability” of its products despite high demand in the current supply chain environment, its marketing director for Europe told Energy-Storage.news.
May 19, 2022
Co-located storage is growing as a proportion of the UK market with 7.2GW of projects in the pipeline, but structuring deals and offtake agreements presents a complex challenge according to an expert source.

Most Popular

Email Newsletter