Ampere Ampere.StoragePro (grid)
The Ampere Ampere.StoragePro (grid) is a hybrid solar inverter and battery storage system marketed by Energie Konzepte Deutschland and built on the SAJ H2 Series platform. It combines PV generation, battery charging and discharging, and grid interaction in a single unit for residential and small-commercial installations. This Modbus TCP template reads the grid-side measurements exposed by the inverter: total grid exchange power, per-phase AC currents on phases A, B, and C, and cumulative grid energy. Connecting these registers to the ModbusCloud Gateway gives installers and building owners a live and historical view of grid import and export without proprietary cloud dependencies.
- Protocol
- Modbus TCP
- Connection
- Ethernet, Modbus TCP
- Registers
- 5, read only
- Brand
- Ampere
- Compatible models
- H2 Series Hybrid Solar Inverter · Ampere.StoragePro
- Last updated
Registers (5)
5 read, 0 write
| Name | Unit | Access | Address (Hidden until you enter your email) | Function (hidden) | Type (hidden) |
|---|---|---|---|---|---|
| power | W | Read | |||
| currents_a | A | Read | |||
| currents_b | A | Read | |||
| currents_c | A | Read | |||
| energy | Wh | Read |
Loading registers…
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If a device is not in the library yet, we build the template for free as soon as we have the register data.
Use cases
- Monitor real-time grid exchange power to verify that the Ampere.StoragePro is not unexpectedly drawing from the grid during peak solar hours.
- Track cumulative grid energy over time to calculate monthly import and export totals for energy billing reconciliation.
- Alert on sustained high current readings on any single phase to detect load imbalances across the three-phase grid connection.
- Compare per-phase currents on phases A, B, and C to identify asymmetric load distributions in the building's electrical installation.
- Report grid power trends across multiple Ampere.StoragePro sites from a single ModbusCloud portal overview to support fleet-level energy management.
Installation
Enable Modbus TCP on the Ampere.StoragePro by navigating to the communication or network settings in the inverter's local web interface and confirming that Modbus TCP is active on port 502.
Assign the inverter a static IP address on your LAN and connect the ModbusCloud Gateway to the same network segment so it can reach the inverter at port 502.
In the ModbusCloud portal, add a new device, import the Ampere.StoragePro (grid) template with one click, enter the inverter's IP address, set the unit ID to match the value configured in the inverter (commonly 2 for the inverter itself), and save.
Verify the connection by opening the live register view in the portal and confirming that the power and currents_a readings update in real time and match values shown on the inverter's local display or app.
Things to watch for
The gateway connects but all register values read as zero or null.
Confirm that the unit ID in the ModbusCloud portal matches the slave address configured in the inverter. The Ampere.StoragePro inverter commonly uses unit ID 2, while the Ampere.IQ energy manager uses unit ID 1. A mismatch causes silent zero or empty responses rather than a connection error.
The energy register returns implausible or scrambled 32-bit values.
The energy register is uint32, spanning two consecutive 16-bit Modbus words. If your reading appears byte-swapped or word-swapped, check the word-order setting in the ModbusCloud Gateway configuration. The SAJ H2 protocol uses big-endian byte order, but some firmware builds swap the high and low words. Try toggling the word-order option and re-reading the register to confirm the correct value.
Polling drops out intermittently after adding more monitoring clients.
The Ampere.StoragePro's Modbus TCP server supports only a limited number of simultaneous TCP connections. If the Ampere.IQ box, Home Assistant, and the ModbusCloud Gateway all poll concurrently, the inverter may refuse or drop connections. Reduce polling sources or increase the ModbusCloud Gateway polling interval to avoid saturating the connection limit.
Grid power values look correct at midday but drift oddly overnight.
Assign a static IP address to the inverter. If DHCP reassigns the address after a lease expiry, the Gateway will continue polling the old address and may receive responses from a different device or time out silently. Document the static address and update the portal configuration if you change it.
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