Connect IAMMETER Meters Directly to Home Batteries

IAMMETER P1 Adaptor Feedback Request: Connect IAMMETER Meters Directly to Home Batteries

In many parts of Europe, utility smart meters provide grid import/export data through the P1 port.
The P1 port is a common smart meter data interface in residential energy systems. Many home batteries, energy gateways, and third-party controllers use this interface to read grid power, import, and export data, then decide when to charge or discharge.

From a technical perspective, the P1 port can be understood as two parts:

Interface: an external device connects to the smart meter through the P1 hardware interface
Protocol: the smart meter outputs real-time energy data in a P1-compatible format

In practical European deployments, the P1 port is often associated with these keywords:

DSMR (Dutch Smart Meter Requirements)
P1 telegram
OBIS code
NEN-EN-IEC 62056-21 Mode D

In other words, many external devices do not just need a physical connector. They also need to read data in a P1-compatible message format. In many cases, this means reading a P1 telegram, with measurement items identified by OBIS codes.

Current Problem: Slow P1 Data Refresh and Noticeable Delay

Recently, we received a suggestion from a customer.

This customer is already using WEM3080 together with WPC3700, and is now planning to add a Marstek Venus E home battery. The customer would like the battery system to read data directly from IAMMETER, instead of requiring an additional standalone P1 meter.

The reason is straightforward: many existing P1-based devices can forward data, but in real applications they often have several limitations:

Low data refresh frequency
Limited real-time performance
Noticeable delay
The need to install one more separate device, which increases both system complexity and installation cost

By comparison, IAMMETER meters already provide more responsive real-time data. If this data could be converted into a P1-compatible form, users could avoid installing a second "smart meter" just for battery integration.

The Direction We Are Evaluating: An IAMMETER P1 Adaptor

Based on this suggestion, IAMMETER is evaluating whether to develop a P1 Adaptor.

The basic concept is:

Read real-time data from IAMMETER meters through Modbus/TCP
Convert this data inside the adaptor into a P1 telegram / DSMR-compatible format
Organize the output according to common P1 conventions, including familiar OBIS code data items
Provide the corresponding P1 interface
Allow home batteries or other external devices to read it as if it were a standard P1 smart meter

If this approach works well, users could use IAMMETER as the underlying real-time data source, and then rely on the P1 Adaptor to integrate with existing home battery systems, storage gateways, or other energy management devices.

We especially invite you to join the discussion in our forum and post your suggestions here:
https://imeter.club/topic/886

What Kind of Feedback We Are Looking For

If you are interested in this direction, we would like to hear your suggestions, especially on topics such as:

What kind of hardware interface should the P1 Adaptor use
Which P1 protocol details, DSMR versions, or device brands should be prioritized
How the adaptor should be powered
Whether it should draw power from the grid side
Whether battery-side power would be more practical
Whether simple USB power would be the best choice
What requirements you have for refresh rate, real-time performance, and stability
Which home batteries or energy management devices you would most like to see supported first

Rewards for Useful Suggestions

To thank users for participating:

Users who provide useful suggestions will receive IAMMETER reward points. See the IAMMETER Contributor Center Contribution Guide
Some participants may also receive a chance to join the future free trial program for the P1 Adaptor

If you are an IAMMETER user, you are welcome to sign in to the IAMMETER Contributor System to share your opinion with us and earn reward points.