Ruben Stolk
Co-founder
Co-founder of Joulo and builder of the platform. Previously Capptions (compliance infrastructure). Writes about engineering, integrations and MID meters.
LinkedInNews
Joulo holds ISO 27001: what it means for a registration provider
Joulo is certified to ISO/IEC 27001:2022, the international standard for information security. What the standard requires, how the audit went, what we built for it, and what the certificate does and does not say.
Regulation
How a verifier checks your charging sessions
An independent verifier checks every booking each year. What the verifier checks, what counts as evidence and what it means for you.
Chargers
Charge on your own solar with Home Assistant • and how Joulo fits on top
Home Assistant can dynamically throttle your charger so your car only charges with your solar surplus. Here is how surplus charging works, and how Joulo turns those kilowatt-hours into income afterwards.
Market
How Joulo sells on your behalf: from kWh to quarterly payout
Part 6, the finale of our series on ERE trading. How Joulo pools your charging sessions, sells them at market price and pays out quarterly, net of the service fee.
Chargers
Connecting Victron to Joulo for ERE registration
Connect your Victron system to Joulo through VRM for ERE registration. The EV Charging Station has no built-in MID meter. The sessions it measures today do not count towards EREs, not even later. Your sessions count only from the day a new MID charger, a MID meter inside the housing or a SAP is in place.
Chargers
Alfen chargers & ERE certificates: what you need to know
Got an Alfen charger at home? Then you are well prepared for the ERE scheme. Alfen is one of the most common charger brands in the Netherlands, and every model with a built-in MID meter satisfies the requirements of the Dutch Emissions Authority (NEa).
Chargers
Installing the Tesla Wall Connector Gen 3 MID
The MID-certified version of the Tesla Wall Connector Gen 3 qualifies directly for ERE registration through Joulo. Everything about installation, Power Sharing and connecting it to Joulo.
Market
Your charging data is yours. And here is how we keep it that way.
Who may access your charging sessions, and who decides? The starting point is simple: your charging data is yours. What that means for your authorisation, your EAN, and what Joulo does and does not do.
News
Our own Tesla Wall Connector 3 MID is now on the wall
We spent months building the platform that turns home charging into ERE payouts • and only now got our own certified MID meter. An honest story about our own charger.
Chargers
Manage your charger without a subscription (1/3): connect via OCPP
Part 1 of 3. Connect your OCPP charger to Joulo once and everything runs by itself: sessions, ERE registration and payout. No subscription needed.
Chargers
Ohme now works with Joulo
The Ohme connection is live. You sign in once with your Ohme account, after which Joulo fetches your charging sessions automatically and registers them for ERE. The Ohme Home Pro has a built-in MID meter, so it counts right away.
Regulation
Our journey to zero manual entry: how audit requirements shaped our design
Typing in meter readings by hand is an audit risk. This is why we drove it down toward zero, and how the verifier's requirements pushed us to automatic linking and upload.
Product updates
Uploading charging data, now fully automatic
Export your charging sessions from your CPO portal and upload them in your dashboard. From now on those files are processed fully automatically • read out, checked and de-duplicated, with no wait for manual review.
