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Article 6 of 25 · Energy insight and dataReading the smart meter P1 port: a guide for businesses
Direct answer
The P1 port is a read-out port on the Dutch smart meter, a telephone plug connection (RJ12) that you may use yourself. Connect a read-out device or dongle to it and you read your own consumption and feed-in almost in real time. The port provides live metering data: kilowatt-hours, the instantaneous power and, if a gas meter is linked, your gas usage.
- Clear definition
- Data-driven assessment
- Risks and opportunities visible
- Practical next steps
Reading the smart meter P1 port: scattered information versus Energy Intelligence
Your energy bill only shows what you used after the fact. For a business that wants to manage energy, that is too late: you want to know now what a machine, cooling unit or charging point draws. The Dutch smart meter has a customer port for this, the P1 port. It makes the metering data the meter already records directly available at your own site. So you do not have to wait for the monthly or annual settlement from your supplier.
- The P1 port is a physical telephone plug connection on the smart meter that the user may use, separate from the grid operator.
- A read-out device or dongle on the P1 port delivers near real-time data: consumption and feed-in in kilowatt-hours, current power and gas usage.
- The grid operator reads the meter separately via its own port; your P1 read-out changes nothing about that and costs you nothing with the grid operator.
Insight
Traditional approach
Information is scattered across portals, documents, invoices or separate spreadsheets.
Modern approach
Data, context and interpretation are brought together into a clear decision picture.
Decision-making
Traditional approach
Choices are made based on averages, assumptions or occasional analyses.
Modern approach
Scenarios, KPIs and current measurement data make the trade-off more concrete and repeatable.
Follow-up
Traditional approach
Actions often stay non-committal or disappear into separate reports.
Modern approach
Follow-up actions, monitoring and reporting are linked to the same energy data.
What exactly is the P1 port?
The Dutch smart meter has several ports, each with its own task. The P1 port is the one meant for you: a telephone plug connection of the RJ12 type, on the front or underside of the meter. You connect your own read-out device to it, often an energy consumption manager or a small dongle. The port sends a short message with the current meter readings at brief intervals. The meter also has a separate port for the grid operator, which uses it to collect the readings remotely. These two are independent. What you do through the P1 port does not affect the grid operator's measurement.
- P1 is the customer port; another port is for the grid operator.
- The connector is a telephone plug of the RJ12 type.
- You connect your own read-out device or dongle to it.
- The port passes on the current readings at short intervals.
Which data do you read out?
Through the P1 port you receive the data the smart meter measures itself. For electricity these are the meter readings in kilowatt-hours, split into consumption and feed-in, plus the instantaneous power in kilowatts at that moment. If a gas meter is linked to the smart meter, your gas usage comes along too. Because the port passes these values on almost in real time, you see the effect almost immediately when you switch something on or off. That is exactly the insight the ordinary settlement is too coarse and too late for. You work with your own data, on your own connection.
- Electricity readings in kilowatt-hours, separate for consumption and feed-in.
- The current power in kilowatts at the moment of measurement.
- Gas usage, if a gas meter is linked to the meter.
- The values refresh almost in real time, far faster than an invoice.
What can you do with it as a business?
With a P1 port read-out you build your own energy monitoring, without waiting for invoice data from your supplier. You link the data to a dashboard or log it locally, and see per moment what your building or process consumes. This helps to recognise peak moments, check equipment and test the effect of measures. Keep the limits in mind. You read out with local hardware on the meter itself, so you need physical access to that meter. And you only see this one connection. If you have multiple sites or connections, each counts as a separate read-out.
- Your own monitoring without waiting for the supplier's settlement.
- Link the data to a dashboard or record it locally.
- Reading out requires local hardware and physical access to the meter.
- You only see this one connection; each site is a separate read-out.
Curious what this looks like with your own data?
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