A SolaX inverter portal can show how much solar electricity the system generated. That is useful—but generation alone does not reveal the actual financial result.
To understand whether the solar system is really lowering the electricity bill, the homeowner also needs to know:
Without grid import/export data, these figures cannot be calculated accurately from inverter generation alone.
For a home with a single-phase grid and a single-phase SolaX inverter, one dual-channel WEM2067 measures the two missing sides of the energy equation at the same time:
IAMMETER-Cloud combines the two measurements to calculate home consumption, direct solar use, self-consumption rate, electricity cost, feed-in income and solar savings.
In other words, the homeowner can move from “My solar system generated 20 kWh today” to “How much of that energy did I use, how much did I sell, and how much money did I actually save?”
View the complete WEM2067 home solar solution
Works with other inverter brands: SolaX is the example in this case, not a compatibility limit. WEM2067 measures AC energy directly, so the same method works with any brand of single-phase solar inverter when the grid is also single-phase and the grid and inverter conductors can be measured separately.
Scope: This is an independent energy-monitoring solution. WEM2067 does not replace manufacturer-approved equipment required for export limitation, zero-export control, battery operation or inverter control.
The reference setup has:
The inverter output answers one question: How much energy did the solar system generate? It does not show where every generated kWh went or what each energy flow was worth.
It does not, by itself, answer all of these questions:
The financial value of one solar kWh depends on where it goes:
Because retail and feed-in tariffs are often different, total solar generation cannot be multiplied by one price to obtain an accurate savings figure. Measuring both inverter output and grid exchange closes this information gap.
| WEM2067 channel | Measurement point | Data obtained |
|---|---|---|
| Channel 1 | Main grid connection | Grid import and grid export |
| Channel 2 | SolaX inverter AC output | Solar generation |
The diagram shows the same topology used in this SolaX case: one CT measures the grid connection and the other measures the inverter AC output.
For terminal wiring, CT placement and current direction, follow the complete WEM2067 wiring guide.
WEM2067 measures the electrical flows directly rather than depending on a SolaX protocol, API or cloud interface. It does not need to identify the inverter brand: Channel 2 measures the AC energy delivered by the inverter, while Channel 1 measures the home's exchange with the grid.
The same arrangement can therefore be used with SolaX and other single-phase inverter brands. It also allows the monitoring setup to remain in place if the inverter is replaced later.
The SolaX dongle can still be retained for inverter status, faults and internal parameters. The two products serve different purposes.
After the two channels are installed and configured correctly, IAMMETER-Cloud can present:
The key calculation is based on measuring generation and grid exchange over the same period. This turns two power measurements into a complete household energy-flow view.
Open the IAMMETER live solar demo
At the time of writing, WEM2067 is listed at US$88. Check the current WEM2067 purchase page for regional pricing and availability.
For this monitoring case, one WEM2067 covers the two required measurement points. IAMMETER-Cloud Basic is included as standard, so the value is not limited to the meter hardware: the homeowner also receives the solar dashboard, historical reports and financial analysis.
| Capability | SolaX inverter + dongle without grid measurement | WEM2067 in this case |
|---|---|---|
| Solar generation | Yes | Yes, measured at AC output |
| Inverter status and faults | Yes | No |
| Grid import and export | No | Yes |
| Home consumption | Incomplete without grid data | Calculated from both channels |
| Solar self-consumption | Incomplete without grid data | Calculated in IAMMETER-Cloud |
| Bill, feed-in income and savings reports | Platform-dependent | Included in IAMMETER-Cloud |
| Independent of inverter brand | No | Yes |
| Inverter or zero-export control | May be available with approved SolaX equipment | No |
The US$88 comparison applies to independent monitoring. It is not a claim that WEM2067 replaces every function of a SolaX dongle, SolaX meter or control accessory.
Correct CT placement and direction are essential. A reversed CT can make import appear as export or make the calculated household consumption incorrect.
This design is suitable when:
Choose a different meter or topology when:
Although this article uses SolaX as the case, the measurement principle is not inverter-specific. For any brand of single-phase inverter, WEM2067 can use one channel for the grid and one for the inverter output when the installation meets the conditions above. See the solar energy monitor for home solution for the general WEM2067 approach, or use the meter-selection and wiring guide for other system types.
If the system already uses SolaXCloud or SolaX Portal, IAMMETER may retrieve supported inverter data through a cloud bridge. An IAMMETER meter can then provide the grid-side measurement required for a complete home solar view.
See the SolaX Cloud Bridge integration guide for the current method and supported data.
The cloud-bridge method and the two-channel WEM2067 case solve the problem differently:
The following procedure is retained for users of the older SolaX Portal interface. The screenshots are legacy material and may not match the current SolaX interface. Before using this method, confirm that the account and inverter still support binding an IAMMETER serial number.
Step 1: Install and configure the Wi-Fi energy meter, then register it in IAMMETER. See the IAMMETER Quickstart Guide.
Legacy CT-direction note: The older SolaX Portal integration used a different current-direction definition. Its CT direction was therefore reversed compared with the normal IAMMETER documentation. This note applies only to the legacy portal-binding method, not to the WEM2067 home solar case above.
Step 2: Bind the meter in the older SolaX Portal:
If the integration is still supported for the account, meter data should appear on the SolaX overview and report pages after several minutes.
Three Phase Wi-Fi Energy Meter (WEM3080T)
Single Phase Wi-Fi Energy Meter (WEM3080)
Three Phase Wi-Fi Energy Meter (WEM3046T)
Three Phase Wi-Fi Energy Meter (WEM3050T)
