Joulen

Name

Joulen

Legal name

Power On Technologies Ltd

Website

https://joulen.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

11–50 employees

Ownership category

akta.pro rank

Product category

Energy Management Software

NAICS

Computer Systems Design and Related Services (54151), Custom Computer Programming Services (541511)

SIC

Services-Computer Integrated Systems Design (7373)

akta.pro primary industry

Balancing & Ancillary Services Optimization / Automated Bidding (Algo Trading) (EUAGAKAJ)

Keywords

• Energy optimization software
• Renewable energy forecasting
• Battery storage optimization
• Virtual power plant platform
• Distributed energy aggregation

Headquarters

HQ city

Belfast

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Software

Cost components

Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Software-as-a-Service (SaaS) Platform Licensing: Joulen provides its PARIS optimisation platform as a SaaS product to energy suppliers, home energy management providers, and commercial/industrial customers. The platform is also offered as a white-label solution, enabling partners to brand the technology under their own identity (e.g., AI·leen for SonneNext). Revenue is generated through recurring platform licensing fees for residential, commercial, and grid-scale deployments.
2. Energy Market Trading and Aggregation Services: Joulen acts as an aggregator and trading partner, enabling distributed residential and commercial energy assets to participate in energy and flexibility markets. Revenue is generated through market trading margins, capacity market revenues, and flexibility service fees earned by coordinating asset dispatch across wholesale, capacity, and grid services markets.
3. Professional Services and Consulting: Joulen provides energy optimisation consulting, implementation support, and project delivery for government-funded and commercial clean energy projects. Revenue is earned through project-based professional services engagements, as evidenced by collaborations with academic institutions and government co-funded initiatives.

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

Joulen sells and licenses PARIS (Predictive Analytical Renewables Integration System), an AI-driven SaaS platform that forecasts energy needs, renewable generation, and energy market values every 15 minutes, simulates optimization scenarios via a Decision Engine, and executes automated trades and asset control for battery storage and renewable assets. The platform is offered directly to residential, commercial, and grid-scale customers and via white-label/OEM partnerships to energy suppliers and battery OEMs, with an associated mobile app and Insights Portal for end-customer reporting.

Product overview

Joulen offers a unified AI-powered platform called PARIS (Predictive Analytical Renewables Integration System) with a white-label option for partners. The core platform combines forecasting, decision-making, and asset control capabilities to optimize renewable energy and battery storage across residential, commercial, and grid-scale operations. Services are delivered through direct offerings and partnerships with energy suppliers, with an associated mobile app (PARIS Insights) for customer monitoring.

Differentiator

Problem solved

Functional benefit

Brands

• PARIS: AI-powered Predictive Analytical Renewables Integration System - Joulen's core software platform for energy optimisation that enables forecasting, decision-making, asset control, and reporting for residential, commercial, and grid-scale energy assets.
• AI·leen

Products and services

• PARIS (Predictive Analytical Renewables Integration System) AI-driven energy optimisation SaaS platform that forecasts energy needs, renewable generation, and energy market values; optimises battery storage; executes automated trades; and controls distributed assets for residential, commercial, and grid-scale customers.
• PARIS White-Label Offering White-label version of the PARIS platform that allows energy suppliers, home energy management system providers, and OEMs to offer optimisation, forecasting, trading, and flexibility aggregation services under their own brand.
• AI·leen (SonneNext White-Label) White-label AI-powered energy management system developed for SonneNext, enabling households to optimise energy use, benefit from real-time insights via the AI·leen mobile app, and trade excess power back to the grid in the German residential market.
• Residential Energy Optimisation Service Service offering that applies PARIS optimisation to residential solar and battery systems via energy suppliers and home energy management providers, delivering smart charging, Virtual Power Plant aggregation, forecasting, and trading for homeowner savings and grid flexibility revenue.
• Commercial Energy Optimisation Service Service that uses PARIS to reduce grid costs, generate new revenue streams through energy trading and flexibility markets, and reduce carbon footprint for commercial buildings and multi-site C&I customers.
• Grid Scale Energy Optimisation Service Service for grid-scale battery storage operators using PARIS AI algorithms to maximise revenue, optimise energy trades, and efficiently participate across wholesale, capacity, balancing, and ancillary markets.

Quantifiable outcome

• Up to 70% peak energy cost savings for residential customers (Project Girona)
• +5 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature5 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• HSEnergycoreStrategic or Co-development Partner · 25 March 2026Joulen entered a multi-year strategic partnership with HSEnergy to deliver energy optimisation and market participation across HSEnergy's large-scale portfolio of UK residential and commercial solar and battery assets. Joulen aggregates, optimises, and orchestrates the portfolio as a single coordinated system, enabling participation in capacity market, wholesale trading, and flexibility markets.
• SonneNextcoreOEM/ Whitelabel/ Licensing PartnerPartnership with German energy company SonneNext to develop AI·leen, a white-label AI-powered energy management system integrated with SonneNext's residential battery systems. The system enables smart home battery charging, real-time usage insights, energy trading, and grid export for German households.
• Queen's University BelfastcoreStrategic or Co-development PartnerJoulen partnered with Queen's University Belfast as part of the VATTS Project (valued at £490,143), combining battery storage with G Kinetic's Vertical Axis Tidal Turbines. Joulen applied PARIS to maximise the value of power generation and sale of electricity from tidal energy for end users.
• G KineticcoreTechnology or IntegrationG Kinetic developed hydrokinetic (Vertical Axis) tidal turbines deployed as part of the VATTS project led by Queen's University Belfast. Joulen's PARIS platform optimised the energy from these tidal turbines alongside battery storage.
• Project Better EnergyminorStrategic or Co-development PartnerJoulen partnered with Project Better Energy to launch an AI-driven platform in the United Kingdom targeting consumers with solar panels and battery storage systems, projected to save approximately 40,000 homes around $1,500 per year.
• Setanta ConstructionminorStrategic or Co-development PartnerJoulen partnered with Setanta Construction on the SoLow Project, installing a sonneBatterie 10 into the SoLow volumetric PassivHaus modular home and monitoring energy performance for 12 months.
• Northern Ireland Electricity Networks (NIE)minorStrategic or Co-development PartnerNIE supported Project Girona, a Smart Local Energy System in Coleraine, Northern Ireland, providing grid connection and supporting the demonstration of energy flexibility as a service to 60 properties.

Scale indicators10 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• EnergyHub: DERMS (Distributed Energy Resource Management System) platform used by utilities to aggregate and optimise residential DERs (solar, storage, EVs, smart thermostats) for VPPs and demand response. Closely aligned with Joulen's residential VPP, forecasting, and trading functionality, but at significantly larger US-scale deployments.
• Enode: API-first platform that connects and optimises residential energy devices (batteries, EVs, solar, heat pumps) for energy retailers and OEMs. Comparable to Joulen's device-agnostic optimisation and white-label/OEM distribution model, with overlap in home energy management providers as customers.
• Limejump (Shell): UK-based virtual power plant and flexibility aggregation platform, now part of Shell, that trades distributed energy assets in wholesale, capacity, and balancing markets. Direct overlap with Joulen's HSEnergy-style aggregation model and DSR participation in the GB capacity market.
• GridBeyond: AI-driven energy optimisation and demand-response platform for commercial, industrial and grid-scale customers, with strong UK and Ireland presence. Directly comparable to Joulen's PARIS offering in target customers, AI forecasting, multi-market revenue stacking, and geographic footprint.
• Voltus: Virtual power plant and demand-response operator that monetises distributed energy assets across wholesale, capacity, and ancillary services markets. Closely comparable to Joulen's market-trading/aggregation revenue stream and the role of AI in dispatching behind-the-meter flexibility.
• Stem Inc: AI-driven energy storage optimisation and virtual power plant operator for commercial and industrial customers, traded on NYSE. Directly comparable to Joulen's C&I and grid-scale optimisation use cases, multi-revenue stacking across wholesale and ancillary services, and AI/forecasting-driven trading of behind-the-meter assets.

Regional players

• KOKO Networks: Clean energy and energy-as-a-service provider for households and small businesses in East Africa, combining distributed energy hardware with a software platform for monitoring, optimisation, and grid services. Comparable to Joulen in the energy-as-a-service and software-plus-DER model, but operates in a different geography and customer segment.

Broad incumbents

• AutoGrid (Schneider Electric): Energy AI platform for DER optimisation, virtual power plants, and demand response, now part of Schneider Electric's Grid Operations portfolio. Overlaps with Joulen on AI-driven forecasting and multi-asset optimisation, but sits within a much larger industrial software and grid vendor.
• sonnen (Shell): Residential battery manufacturer with an integrated energy management platform, including VPP and grid services; owned by Shell. Comparable to Joulen at the residential battery + optimisation layer and as the hardware counterpart to Joulen's software-only white-label model (e.g., AI·leen running on SonneNext/sonnen-style hardware).
• Kraken Technologies (Octopus Energy): Cloud-based energy retail and optimisation platform owned by Octopus Energy, used by multiple global utilities. Overlaps with Joulen on AI-driven energy optimisation, flexibility, and customer-facing energy management, but operates at much larger scale and as a broader retail/CRM platform rather than a focused optimisation layer.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/wearejoulen
• LinkedInlinkedin.com/company/joulen
• Instagraminstagram.com/wearejoulen

Revenue estimate

Valuation estimate

Number of profiles

Profiles13 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Joulen