SolaX Import and Export Look Wrong? Check the CT Clamp
This is for SolaX owners who want to check the basics before changing settings or calling support.
Start with comparison, not guesswork: inverter, meter, battery and history should tell the same story.
Quick diagnosis
Use this when grid import and export look reversed, impossible or negative. First, separate what the system is really doing from what the app or cloud may be reporting late.
Start with these checks:
turn on a known load,compare utility meter direction,check CT arrow direction,compare night import,watch battery charge/discharge- compare the inverter screen with the app rather than trusting only one number
- write down the exact time of the reading before changing anything
- repeat the check during sun, low load, and a known high load if possible
What this usually means
Most often, this comes down to a reversed CT clamp, wrong meter direction, phase mismatch, or a meter configuration problem. With SolaX, the same symptom can look different depending on model, meter wiring, battery state, firmware and whether the reading comes from cloud polling or a local path.
If one number looks wrong, do not judge it alone. PV production, house load, grid power and battery power need to be read together. A battery schedule can make grid import look strange. A reversed CT clamp can make consumption look negative. A stale cloud value can make a healthy system look broken.
What to check first
- Check the physical inverter or meter display first.
- Compare it with the value shown in your monitoring app.
- Confirm whether the value is changing or only the timestamp is changing.
- Check whether the problem appears only at night, only during PV production, or only when the battery/EV charger is active.
- If the issue involves wiring, CT direction, export limitation or grid behavior, ask the installer to verify the setup.
Diagnostic table
| Signal | What to compare | Why it matters |
|---|---|---|
| Timestamp | Latest app reading vs inverter display | Shows whether data is stale or actually changing |
| Grid power | Import/export direction vs utility meter | Reveals meter or CT direction problems |
| Battery power | Charge/discharge vs SOC and schedules | Explains why PV surplus may not enter the battery |
What to monitor over time
For this specific issue, the most useful trends are: night import baseline, midday export, negative consumption, grid direction during large loads.
One reading can lie. Even a ten-minute snapshot can mislead if a cloud value is delayed, the battery is following a schedule, or the house load changes suddenly. A full day of history usually makes the pattern much clearer.
Safety note
Do not change inverter safety, grid-code, battery or export-limit settings blindly. If the setting affects grid behavior, battery protection or wiring, involve your installer.
Where SolaxMonitor helps
This is where SolaxMonitor helps: it is built around the local Collector path. The Collector runs on an always-on device inside the home network, reads compatible SolaX data locally, and syncs authenticated readings to your account for dashboards, history and automations.
That gives you a timeline instead of one delayed screen. For this kind of fault, the useful question is usually simple: when did the pattern start, and does it repeat?
Continuous monitoring helps
If you want to keep watching it, SolaxMonitor puts PV, house load, battery, grid and Collector history in one place.
SolaxMonitor is an independent monitoring app for compatible SolaX systems. Full real-time history requires the local Collector path.