Energy storage product developer Dynapower has introduced a new line of utility-scale energy storage inverters.

The air-cooled CPS-1500 and CPS-3000 are available in both indoor and outdoor configurations and work with all battery chemistries. Each feature a high-efficiency, three-level topology designed for both grid-tied and microgrid applications.

The Gen 4 CPS inverters also feature Dynapower’s proprietary Dynamic Transfer technology, which allows for the seamless transfer from grid-tied to microgrid mode, and industry-leading Black Start capabilities (in the event of a complete system power outage, Black Start restores power to the facility without the need for external power). Multiple CPS units can be paralleled together to meet the sizing and power needs of any energy storage installation.

Outdoor rated CPS inverters are enclosed in NEMA 3R containers that can be moved with a forklift and allow for placement on gravel or concrete pylons, creating installation savings.

Dynapower’s CPS inverters are an integrated solution containing all required protective features, as well as an AC output breaker and DC disconnect switch. This creates cost savings for end-users and integrators when compared with other inverters that require additional add-on items needed for battery integration. CPS inverters can be supplied with MV transformers to easily integrate customer supplied battery systems into any network.

Spain’s largest oil and gas company, Repsol, has invested in Spanish battery startup Ampere Energy, in a move to emulate industry peers taking positions in clean energy technologies.

Madrid-based Repsol this month put an unspecified amount into Ampere, a residential energy storage player from Valencia with a presence in Spain, Portugal, Italy, Ireland, Benelux and the U.K.

The deal gives Repsol a seat on Ampere’s board and provides Ampere with access to Repsol’s Technology Lab research and development center. Ampere Energy CEO Ignacio Osorio said Repsol’s backing would help the company “undertake ambitious growth plans.”

Ampere has developed a virtual power plant technology called Amperia that it said could be used to tie together distributed energy storage assets. It is unclear if this aggregation capability extends to third-party batteries or is limited to Ampere’s own battery systems, which the company says use artificial intelligence to adapt to user requirements.

The investment comes as Repsol undergoes a major corporate repositioning. In common with other European oil and gas majors, the Spanish giant is keen to reinvent itself as a diversified energy company.

Last November it paid €733 million ($826 million) for almost 2.4 gigawatts of low-emission generation capacity plus a portfolio of 750,000 residential grid customers from the Cantabria-based electricity supplier Viesgo.

Thermal energy storage is gaining ground in refrigeration applications, providing demand management for one of utilities’ most energy-intensive industries.

Industrial refrigeration consumes more energy per cubic foot than any other utility load, said Collin Coker, vice president, sales and marketing, Viking Cold Solutions.

Thermal energy storage generally involves salt water-based solutions that can absorb heat and supplement refrigeration. In these applications, thermal storage offers cost advantages over lithium ion batteries, he said.

“From the utility’s perspective, refrigeration is a very intense load and these commercial and industrial sites are located all over the place,” he said. The grocery stores and other cold storage operators often pay high demand charges in areas like California and New England, he added.

“We can shift the load from peak daytime usage to night time usage, and also reduce overall consumption by running refrigerators at night, when they run more efficiently,” he said.

Who’s using thermal storage
Viking Cold Solutions and Axiom Energy are participating in demand management programs to provide thermal energy storage in refrigeration applications.

Viking Cold Solutions partnered with Eversource to install a thermal energy storage system to reduce the Greater Boston Food Bank’s peak demand, realizing a 75 percent reduction in consumption during the program period, the company said. The partnership is part of Eversource’s Demand Reduction Demonstration in Massachusetts.

A new 1 MW / 1 MWh battery is expected to come online in Consolidated Edison’s territory next month, the first of several the New York City utility will roll out as part of a demonstration project that challenges the definition of energy innovation: sometimes it’s a new technology, other times it’s a real estate deal.

The project takes a new approach to developing energy storage for peak shaving and other grid benefits: rather than search for customers with the perfect load to also benefit and co-own the asset, ConEd tasked distributed generation developer GI Energy with finding under-utilized real estate to lease.

The utility gave GI a list of locations on its grid where batteries could provide a benefit, and the company took care of project development and customer acquisition.

“The conventional behind-the-meter (BTM) model is basically arbitraging utility tariffs,” GI Energy Director of Analytics James Robinson told Utility Dive. “It works but it has some limitations.”

The arrangement with GI utilizes a new type of dispatch and ownership arrangement the company says can help knock down barriers to locating batteries in some areas, particularly where real estate is expensive.

A more traditional battery solution might leverage customer-owned BTM storage assets, but that can be limiting — the utility must find the right customer in the right location with the right peak demand, in order for project economics to work out. And even then, the BTM storage assets tend to be smaller.

A new approach
ConEd’s Commercial Battery Storage (CBS) project takes a new approach, utilizing a third-party to locate and lease appropriate real estate for batteries — with the utility holding primary dispatch rights.

Statkraft has announced a new partnership with redT to provide a fully financed solar and storage solution with 100% renewable energy for businesses in the UK.

Claimed to be the first offering of its kind in the country, the solution is expected to enable businesses to save up to 20% on their bills over the next 25 years.

Statkraft will provide a long term corporate power purchase agreement (PPA) for the solar and battery storage technology, alongside a 100% renewable supply deal from its subsidiary, Bryt Energy, for the remaining power required from the grid.

Solar panels will be combined with redT flow machines without the need for any upfront costs, while Statkraft will also seek to incorporate them into its virtual power plant (VPP) and offer flexibility optimisation services.

The initial phase of the partnership is targeting up to 10MW of solar and 6MWh of energy storage, scaling over three years to 100MW of solar and 60MWh of storage.

Andy Cooper, Head of UK Downstream for Statkraft said: “We are excited to be working with redT energy to provide an attractive combination of renewable energy and long duration energy storage for our customers – we believe our funded solution really enables customers to take advantage of more zero carbon renewable energy, matching it to when it is needed most.

“The partnership with redT enables Statkraft and Bryt Energy to offer additional options that will benefit customers, incorporating storage, renewable energy solutions, advanced asset optimisation and trading within a VPP.”

The largest power distribution company in Switzerland has installed the country’s largest energy storage system.

Elektrizitätswerke des Kantons Zürich (EKZ) now owns and operates 18MW/7.5MWh grid storage solution system installed by NEC Energy Solutions.

The energy storage system is located at an existing substation in Volketswil, near Zurich and will be used for primary frequency reserve and ancillary services.

The energy storage system will ensure the reliability of the grid during times when energy demand is high through the storage of electricity when the grid is stable and supply during peak periods.

The system will provide energy equivalent of the daily electricity consumption of 600 average four-person households and is expected to have a payback of 5-7 years.

Marina González Vayá, energy storage specialist at EKZ, said: “Battery storage is a vital part of future energy supply.

“The now-completed storage system contributes to the stability of continental Europe’s power grid.”

The project is part of efforts by EKZ to modernise its grid network and enable the integration of more renewable energy resources.