Kaluza: Retail billing and home device flexibility software for energy suppliers

Overview

Kaluza started inside OVO, the UK energy supplier, and was launched as a separate business in 2019, according to its June 2024 announcement with AGL. Companies House shows Kaluza Ltd incorporated in London on 20 September 2019 under the name Orion Energy Technology Ltd, renamed Kaluza in October 2020. OVO was its first customer; AGL in Australia became a partner in 2021, and the newsroom records outside licensees, car makers and grid projects from 2020 onwards.

Two strands of work run through the company. The strand behind its largest contracts is retail operations: billing, customer care and product catalogue software that an energy supplier runs its customer accounts on. The other is device flexibility: software that schedules home EV charging, home batteries and heat pumps against wholesale prices, carbon intensity and grid needs, and can pool those devices for system operators and distribution networks. Kaluza has sold this second strand under the Kaluza Flex name, and it is why the company sits among virtual power plant platforms in this directory.

What sets Kaluza apart from most flexibility platforms is that it combines the two. Because it also runs the supplier's billing, it can price device flexibility into the tariff itself: OVO's Charge Anytime plan, which Kaluza powers, charged 7p/kWh for smart-charged EV energy at any time of day in June 2024, according to Solar Power Portal. Its early grid work in the UK, including a 2020 local flexibility service for Western Power Distribution and a 2021 Balancing Mechanism service with Flexitricity, came out of that position. Since 2024 it has spread through outside licensees and car makers rather than through OVO alone.

Offering

Kaluza now sells one licensed product, which it calls the Energy Intelligence Platform. Its platform page divides it into modules:

Retail operations

• Billing and payments: meter-to-cash automation, estimation, single bills for bundled products, and regulatory reporting.
• Customer care: a CRM built for energy accounts, with account views, omnichannel contact handling and case management.
• Commerce: product catalogue, tariff design including time-of-use, quoting and order fulfilment for tariffs, hardware and services.
• Commercial and industrial: pricing, quoting and forecasting for business customers, delivered through Beige, the Melbourne company Kaluza bought in May 2025. Beige's tools include Moose, which produces solar, battery and grid quotes for retailers, and Spider, which reconciles billing data.

Device flexibility

• Energy optimisation schedules EVs, home batteries, solar and heat pumps for the household's cost, for grid stability and for the supplier's purchasing costs, and lets utilities and car makers aggregate those devices.
• EV smart charging works either through a connected chargepoint or directly through the car maker's cloud, and includes bidirectional (V2X) charging programmes.
• Behavioural demand response runs event-based programmes that ask customers to shift use.

How it is sold

Retailers license the platform under multi-year agreements; the ENGIE agreement of September 2025 is described as a wide-scale, multi-market licence, and E.ON will continue OVO's licence after buying OVO. Car makers integrate the charging service into their own apps, as Hyundai Motor Group did for the Kia and Hyundai apps in 2026. Kaluza does not publish prices.

Technology

Kaluza describes the platform as cloud software built around a real-time data core, with GraphQL and streaming APIs and data consolidation on Databricks. The platform page reports 24 million data points processed a day, and the home page claims more than 400 integrations across devices and systems. Kaluza does not publish API documentation or a list of supported device models.

Device connections

Kaluza connects to devices in two ways. The first is through chargers and home equipment: its 2020 Western Power Distribution service dispatched domestic smart chargers, V2G chargers and sonnen batteries, and its California programmes use a Kaluza-integrated chargepoint. The second is through vehicle manufacturers' clouds, which avoids any extra hardware in the home. The BMW integration announced in November 2025 connects BMW's Remote Charging Control directly to Kaluza's optimisation by API, and the company reports three months from contract to go-live. The newsroom lists similar direct-to-vehicle programmes with Volvo in the UK and Mitsubishi Motors in Japan in 2024, and Hyundai and Kia followed in 2026.

Market interfaces

Kaluza's route into grid markets has run through partners. In the 2021 Flexitricity service, Flexitricity acted as Virtual Lead Party in the Balancing Mechanism while Kaluza managed half-hourly settlement for the devices through its retail partners. The WPD service traded intraday local flexibility on the NODES market. In California, Kaluza is an Automation Service Provider in PG&E’s Hourly Flex Pricing pilot.

Security

The company's policies page lists privacy, cookie and health and safety documents but no information security policy, and none of the pages consulted name an ISO 27001 or SOC 2 certificate, a trust centre or a vulnerability disclosure route. Kaluza has held B Corp certification since 2023, which covers governance and social standards, not information security.

Customers

Kaluza's customers are energy retailers and vehicle manufacturers. In September 2026 it reported four major retail clients across eight markets.

Retailers

• OVO has run on the platform since Kaluza began. When E.ON agreed to buy OVO in May 2026, it said it would continue the platform licence for OVO's customer base and evaluate Kaluza across the rest of the E.ON group outside the UK. OVO has about four million customers, according to coverage of the competition clearance.
• AGL in Australia expanded a partnership begun in 2021 into a multi-year licence in June 2024, rolling the platform out to around four million customer services, and bought a 20% stake at the same time, as reported by Solar Power Portal.
• ENGIE signed a global, multi-year licence in September 2025 after a formal evaluation of technology providers. ENGIE serves 20 million household contracts worldwide; the announcement did not say how many will move to Kaluza.
• Mitsubishi Corporation signed a long-term services agreement in September 2026 to take the platform to electricity and gas retailers in Japan.

Vehicle manufacturers

Smart charging partnerships include BMW Group (UK, November 2025), Hyundai Motor Group (UK first, then Australia, with V2G planned from 2027), Volvo and Volkswagen Group UK, according to the newsroom. In Japan, Kaluza Japan ran a residential V2G demonstration in 2025 with MC Retail Energy, Nichicon and Mitsubishi Motors.

Outcomes

OVO's Charge Anytime customers had saved more than £5.5 million since March 2023, according to the June 2024 Solar Power Portal report. In California, Kaluza reports that half of the drivers enrolled in its managed charging programme come from disadvantaged or low-income communities.

Markets

Kaluza's home page names the UK, Australia, Europe and Japan as its markets, and its 2026 releases add North America.

United Kingdom

The UK is the home market, through OVO and the car-maker integrations launched there first. Kaluza's UK grid work includes the Western Power Distribution local flexibility service and the Balancing Mechanism service with Flexitricity.

Australia and New Zealand

Kaluza entered Australia through OVO Energy Australia and AGL. The acquisition of Beige Technologies in May 2025 added a Melbourne team and commercial and industrial products. Mayfair Equity Partners lists Melbourne among Kaluza's hubs.

Japan

Kaluza and Mitsubishi Corporation set up Kaluza Japan Ltd in 2024 to provide device control services such as smart EV charging. In September 2026 Kaluza added a Japanese subsidiary, Kaluza LLC, to deliver the retail platform itself.

United States

Kaluza's US work is in California: an EV charging and V2X programme supported by the California Energy Commission, announced in February 2024, and participation in PG&E’s Hourly Flex Pricing pilot from March 2025.

Continental Europe

ENGIE's multi-market licence and E.ON's plan to evaluate the platform beyond the UK are Kaluza's main routes into continental Europe.

Company

Kaluza Ltd is a private company registered in London, number 12218299, incorporated on 20 September 2019 as Orion Energy Technology Ltd (Companies House). Mayfair Equity Partners describes Kaluza as headquartered in London with hubs in Bristol, Edinburgh, Tokyo and Melbourne. In June 2024 the company reported more than 450 employees across seven hubs.

Ownership and investment

• 2019: launched as a business of OVO Group.
• June 2024: AGL invested US$100 million (AU$150 million) for a 20% stake, which Kaluza said valued the company at around US$500 million (Kaluza; Solar Power Portal).
• 2024: joint venture with Mitsubishi Corporation in Japan.
• May 2025: acquired Beige Technologies, Melbourne; terms not disclosed.
• May 2026: E.ON agreed to buy OVO's UK retail business. Kaluza was not part of the sale, and E.ON said it would keep the Kaluza licence (E.ON).
• September 2026: Kaluza announced that Mayfair Equity Partners, OVO's first outside investor, would reinvest proceeds from the OVO sale in Kaluza, with AGL, Mitsubishi Corporation and the founder remaining co-investors; terms were not disclosed (Kaluza). Mayfair says it obtained its majority shareholding in Kaluza through its investment in OVO and that OVO was sold to E.ON in October 2026, after the Competition and Markets Authority cleared the deal.

Leadership changes

Kaluza has had several chief executives in five years, according to its newsroom. In March 2026 OVO's founder returned to lead Kaluza; in the September 2026 announcement he stepped down as chief executive while remaining a shareholder, and the chair became executive chair and began the search for a new chief executive. The company reports that contracted recurring revenue has tripled since it became independent, without giving a figure.