About Joulo

The vision and mission One idea.

Joulo was built by two entrepreneurs with years of experience in fintech, compliance and software • both Tesla drivers. With the new ERE regulation we combine that expertise into a platform that automatically rewards home chargers.

Net per kWh€0.12–0.15guide price
Service fee20%discounts via referrals
PayoutQuarterly
Retroactive from01-01-2026
Supported brands68+
Automated100%
📱 Mobile appiOS & Android
Share your ERE dataWidget
Net per kWh€0.12–0.15guide price
Service fee20%discounts via referrals
PayoutQuarterly
Retroactive from01-01-2026
Supported brands68+
Automated100%
📱 Mobile appiOS & Android
Share your ERE dataWidget

Joulo by the numbers

supported brands
68

supported brands

31 cloud • + OCPP gateway

fastest to link
Tesla

fastest to link

3s to link · median

// the mission

Accelerating the transition to electric driving.

Everything we build serves that one sentence. Electric driving should be beautiful and easy, and it is not yet everywhere. EREs are the start: they make an electric car cheaper to run. Then comes the rest of charging: sharing your charging station with your neighbours, smart charging at the cheapest moment, one charge card for the road, and charging points for businesses and homeowner associations that we operate. Every barrier we remove brings the switch closer.

Joulo at a glance

ERE registration for home chargers. Earn money for every kWh you charge at home. Joulo automatically registers your charging sessions as Emission Reduction Units (ERE) with the Dutch Emissions Authority (NEa), sells them on your behalf and pays out quarterly. 20% service fee • discounts via referrals. Cancel yearly.

Works with your existing charger • the most automatic integrations. Joulo connects directly with 16 charger brands via their own cloud API: Tesla, Easee, Wallbox, Zaptec, Smappee, V2C, Enphase, NexBlue, ChargeAmps, Ohme, Blue Current, go-e, Victron, Ecotap, Volt Time and SolarEdge. Different brand? Our OCPP 1.6J gateway at ocpp.joulo.nl talks to virtually every modern charger • Alfen, ABB, KEBA, Schneider, Vestel and hundreds more. On top of that, Joulo syncs straight from the backends of charging platforms and energy companies, including Plugchoice. Joulo is the only ERE registration provider combining all three connection routes: cloud API, OCPP and platform backends. Everything runs fully automatically via cloud API or OCPP • you never enter meter readings by hand. A photo or manual entry is not a valid measurement source for registration and creates audit risk in the NEa verification; Joulo uses the full session data from the backend. Not MID-certified? We arrange an upgrade to a MID charger, or you request a Secondary Allocation Point (SAP) with your grid operator. The chargers we supply we source from Rexel, our procurement partner and one of the largest electrical wholesalers.

Web, iOS and Android. Full dashboard on joulo.nl with real-time insight into sessions, ERE credits and payouts. Native apps for iPhone and Android with the same data • with over 20,000 downloads the most-used ERE registration app in the Netherlands. For business partners (energy companies, installers, CPOs, fleet operators) we offer white-label landing pages, REST APIs, widgets and a partner dashboard.

// our story

Fintech DNA, built for the energy market.

Before Joulo existed, we built payment-gateway architecture, audit-compliance platforms and subscription systems at scale. That fintech experience is embedded in every part of Joulo: from automated NEa registration to the audit trail behind every charging session.

As Tesla drivers with Full Self-Driving, we know how great electric driving is. When we discovered that home charging generates emission credits, we saw the opportunity to combine fintech and energy into one platform that automatically rewards EV drivers.

// architecture

Built as one system

Four layers: connections, memory, brain and insight. Together they read your sessions, run the numbers and pay out • without manual work.

🔗

01 · Connections

Joulo talks to 68 charger brands. Connecting often takes a single click.

REST APIOAuth 2.0OCPP 1.6JMID verification
🧠

02 · Memory

Every session, every kWh, every price • remembered and organised.

Charging sessionsEAN registrationEnergy mixMarket prices
⚙️

03 · Brain

Automatically validate, calculate and pay out. No hassle.

NEa complianceAnomaly detectionMarket timingAudit trailCapptions
📱

04 · Insight

Your dashboard, app and exports • always up to date.

Real-time dashboardiOS & AndroidWidgetCSV export

ERE market

How we sell the credits.

A deliberate sales strategy, not speculation.

Joulo aggregates credits from thousands of home chargers and sells them directly to obligated parties under the Dutch Energy for Transport regulation: fuel suppliers and energy companies that must cover their annual obligation (14.4% in 2026, rising to 28.4% in 2030). By aggregating volume we negotiate terms an individual driver would never get on their own.

We pursue a deliberate strategy to consistently pay out a market-aligned price. The price itself remains subject to supply and demand • we always communicate the current guide price upfront and the actual realisation afterwards. No price guarantees, full traceability: every kWh, every certificate, every euro.

// founders background

Years of experience in fintech and compliance.

Johan has worked in energy and tech for years • from Solarplaza to Philips. Ruben has been building software and platforms for years with his company Capptions. Together we combine that experience in Joulo.

That background makes Joulo different: we understand how markets work, how to process data reliably and how to build a fair product that people trust.

🏦

Fintech & payments

Payment gateway architecture, transaction processing

Energy markets & commodities

Emission rights, RED III regulation, NEa registered

🛡️

Regulatory compliance

MID certification, GDPR, audit trail via Capptions

🔌

EV ecosystem & charging infra

OCPP, charger APIs, smart charging protocols

// the team

The team behind Joulo

Fintech, energy and the financial markets. The team behind every booked kWh.

Ruben Stolk

Ruben Stolk

Founder • Managing Director

Fintech Architecture & Compliance

15+ years of experience in audit and compliance software. Founder of Capptions B.V. • a platform used by large enterprises to manage inspections, incidents and regulations. At Joulo he owns the fintech architecture, NEa registration and the audit trail behind every charging session. BSc Telematics (UT), MSc Computer Science & Economics (EUR).

Compliance softwareFintechCapptions B.V.NEa registered
Tesla Model Y
Johan Trip

Johan Trip

Founder • Managing Director

Payments & Energy

Was at the start of Solarplaza.com and served as smart meter and EV specialist at KPN. Led REX, a demand-response startup within Alliander subsidiary Entrnce, and co-built energy company ServiceHouse • since sold to Coolblue. At Philips he scaled the subscription and payment platform to 505K subscribers and €40M ARR. Combines payments-at-scale expertise with deep energy market knowledge.

PaymentsEnergyDemand responseSubscriptions at scale
Tesla Model X
Harm Oosthoek

Harm Oosthoek

Head of Trade

Trading & Markets

7+ years as a trader at Flow Traders • Europe's largest liquidity provider and market maker in ETFs and futures, active across equity, fixed income, FX and commodities. That's where he learned how price formation, liquidity and market structure really work. At Joulo he owns the trading strategy behind ERE sales: how and when your units are brought to market. MSc Financial Economics, Erasmus University Rotterdam.

Flow TradersMarket makingCommodities & futuresMSc Financial Economics

// our approach

How we build

Three principles guide everything we build.

01Invisible

The best infrastructure goes unnoticed

Joulo works in the background • no manual work, no hassle. Registration, validation and payouts are fully automated.

02Fair

Every kWh is traceable

Every euro is accountable. Transparency is architecture: full audit trail with source, timestamp and mutations per session.

03Autonomy

The system runs itself

The system learns, validates and pays out. Without intervention, without delay. Built to scale without human bottlenecks.

Joulo mobile app

Use Joulo on mobile.

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Help build the financial layer of the transition

Are you an EV driver and want to start earning? Or interested in a partnership as an installer or consultant?