Energy Startups

Oceanvolt develops electric propulsion systems for sailboats and marine vessels, replacing traditional diesel engines with sustainable electric alternatives. The company serves boatbuilders and the global sailing industry with propulsion technology focused on environmental performance and quieter operation.

3 investors

Octopus Energy is a British renewable-energy supplier that powers over 10 million homes across the UK and internationally with green energy tariffs and customer service, and develops smart energy technology and hardware. It operates as a global group spanning renewable generation, EV services, heat pumps, and energy software, active in the UK, Germany, USA, Japan, Spain, Italy, France, and New Zealand.

3 investors

Offgrid.finance provides inventory finance and asset-finance advisory to solar and agritech clean-technology companies in emerging markets such as Kenya, Uganda, and Tanzania. It serves start-ups, established cleantech firms, corporates, investors, and non-profits seeking access to finance.

3 investors

Ogre provides AI-based forecasting and operational tools for the energy sector, covering renewable energy generation, demand, technical losses, EV charging station demand, prosumers, and anomaly/non-technical loss detection. Its platform serves energy businesses and grid operators to reduce costs, improve efficiency, and support sustainability goals.

3 investors

Okra designs and deploys renewable energy microgrids and software for remote communities in developing regions. The company provides power-sharing algorithms, IoT firmware, and grid management technology to enable sustainable energy access in underserved areas.

3 investors

OneD Battery Sciences develops nanowire anode materials and manufacturing processes for lithium-ion batteries used in electric vehicles. The company operates a pilot production facility to scale advanced electrochemical cell production for battery makers and automakers.

3 investors

Oort Energy builds electrolyser systems that produce hydrogen from water and electricity, ranging from compact self-contained units up to multi-megawatt industrial-scale deployments. The products target high-demand and industrial hydrogen applications for clean energy production.

3 investors

Open Hydro develops technology to assess and mitigate greenhouse gas emissions from freshwater systems, including reservoir emissions, providing climate mitigation and resilience insights for hydropower utilities and water industries. It serves water users and utilities worldwide with emissions management and climate action tools.

3 investors

Open Access Energy runs a platform that connects private energy generators (Independent Power Producers and traders) with large energy buyers over publicly owned grids, handling wheeling transactions, contract automation, and per-transaction revenue management. It also offers smart metering, tariff automation, billing, and real-time dashboards for municipal electricity operations.

3 investors

Opt-E offers, implements, and operates energy-saving solutions together with selected partners and supplies energy at competitive terms. It helps businesses reduce energy costs and environmental impact.

3 investors

Optiwatt provides a load management platform for utilities and grid operators to run virtual power plant and demand response programs by dispatching EVs, smart thermostats, and Level 2 chargers. It combines a consumer mobile/web app with an operator portal, optimization engine, device integrations, and incentive processing, serving investor-owned, public-power, and co-op utilities across North America.

3 investors

Orkestra provides energy modelling software for commercial and industrial (C&I) solar and battery projects, offering feasibility analysis, configurable system design, pre-loaded tariff and load data, and shareable reporting. It also offers an asset management platform to track energy and financial performance of solar and battery portfolios, aimed at energy consultants and sustainability teams.

3 investors

OSC designs and deploys customized simulation centres and virtual prototypes for offshore and marine operations, including vessel training, subsea operations, and heavy lift installations. The company serves operators in oil, gas, renewable energy, and decommissioning sectors across multiple continents.

3 investors

This page lists the investors backing Osperity. It does not describe the company's own products or services.

3 investors

OXCCU develops catalytic technology that converts waste CO2 into sustainable aviation fuel, chemicals, and biodegradable plastics, with an initial focus on decarbonising air transport. The Oxford-based company serves the aviation and energy sectors with low-carbon fuel production technology.

3 investors

Oxford Flow manufactures precision valves and regulators using a single-piston design for oil & gas, hydrogen, and water infrastructure. The technology eliminates traditional moving parts to reduce emissions, maintenance costs, and failure rates compared to conventional valves.

3 investors

Pakal Technologies designs high-efficiency power semiconductors for electrification applications including electric vehicles, solar systems, and induction heating. The company produces 650V and 1200V power conversion devices to improve efficiency and reduce costs across electrified systems.

3 investors

Peak Power enables energy service companies, solar developers, and energy brokers to offer battery storage solutions to customers through a fully financed energy-storage-as-a-service model. The company handles development, permitting, equipment, and construction while partners capture revenue through referral fees or joint sales arrangements.

3 investors

Phasic Energy designs and manufactures advanced heat exchangers that offer higher heat transfer, lower pressure drop, and compact form factors compared to conventional designs. Its products serve critical infrastructure sectors including data center thermal management, defense and aerospace, geothermal energy, and industrial waste heat recovery.

3 investors

Phelas develops Catalyst, a modelling and analysis tool for energy storage projects (BESS) that helps evaluate and prove the viability of renewable energy storage projects. It serves energy storage project developers and investors, with expertise in European balancing markets and battery dispatch strategies.

3 investors

Plume is a software platform for renewable energy developers that uses natural language processing and AI to analyze geospatial data, regulatory constraints, and grid infrastructure for solar and wind projects across Europe. The platform automates site selection, due diligence, and project intelligence workflows to accelerate land identification and validation.

3 investors

Princeton NuEnergy develops proprietary closed-loop manufacturing processes for lithium-ion battery materials using low-temperature plasma-assisted separation technology. The company produces rejuvenated cathode active materials and advanced black mass for battery producers and recyclers across the United States.

3 investors

Podero provides an integrated SaaS platform that enables utilities to optimize, control, and trade connected device fleets including electric vehicles, solar inverters, batteries, and heat pumps. The platform helps utilities monetize grid flexibility through real-time device steering and participation in energy markets.

3 investors

Polaroo is a cloud platform combined with a dedicated account-manager team that digitizes utility invoices (electricity, gas, water, internet, phone, alarms) and manages supplier contracts, integrating with over 150 providers and accounting ERPs. It serves businesses—particularly property and real-estate operators such as co-living and coworking companies—to reduce supply costs, automate administrative tasks, and track energy consumption.

3 investors