Guides

Does the app say offline, is a code flashing, or is this year’s total lower than last year’s? Each guide tells you what to check first, what it usually is, and what waiting costs you.

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  • Solar inverter offline, or not producing? How to tell

    • Inverter & errors

    Offline in the app is not the same as not producing. This guide separates a communication fault from a production fault from one dead string, with a concrete test for each, per-brand instructions for reading the inverter itself, and what a silent week costs.

    14 min read

  • Solar panels producing less than expected: less than what, exactly?

    • Production

    Producing less is not the same as broken. Three comparisons you can run today, the causes in order of likelihood, and what your brand app will and will not warn you about.

    15 min read

  • How do I know if my solar panels are working? Four checks, and what none of them tell you

    • Production

    Four checks, easiest first: inverter display, brand app, meter at midday, multimeter. What each one cannot tell you, what to look for on SolarEdge, Enphase and Growatt, and which other apps do what.

    13 min read

  • Solar panel health check you can do yourself in 15 minutes

    • Production

    Six checks you can run yourself in about a quarter of an hour, in the order that finds faults fastest: is it producing now, does last month match the weather, who gets the alerts, any code or red light, how old the kit is and what is still under warranty. Plus the one loss this check will not find.

    10 min read

  • Enphase "microinverter not reporting": one panel, some panels, or all of them?

    • Inverter & errors
    • Enphase

    One black panel, a few, or all of them? If every panel went black at once, check the gateway first: production can carry on while it is offline. What the four IQ Gateway LEDs mean, the usual causes, and when Enphase actually notifies you.

    12 min read

  • Expected solar output calculator: how to check your solar production against the weather

    • Production

    Your app knows how many kWh you made, not what the weather allowed. How to get that second number for your own roof from PVGIS, check a month against it, and what your brand app compares your output against.

    15 min read

  • Growatt datalogger red light: flashing red is not a fault

    • Inverter & errors
    • Growatt

    In Growatt's own ShineWiFi-X manual, a flashing red datalogger LED means the stick has successfully connected to the inverter. The state that signals failure is solid green. The inverter's own LED works the other way round: on the MIN TL-XH, solid green is normal and solid red is a fault.

    10 min read

  • Growatt PV Isolation Low: error 203, 125 and relay fault 117

    • Inverter & errors
    • Growatt

    PV Isolation Low is code 203 on the MIN family, 125 on the 30-50K TL3-S, and unnumbered on SPH hybrids. Warning 203 is a different fault from Error 203, error 117 is a relay fault rather than a battery fault, and a flashing red datalogger LED means the logger is working.

    14 min read

  • SolarEdge error codes: 18xB5, 18xB7 and 18xBC explained

    • Inverter & errors
    • SolarEdge

    18xB5, 18xB7 and 18xBC all carry the same official action: contact support, RMA related. What they mean and what to do next, the rest of SolarEdge's January 2026 code list, what S_OK and P_OK on the display tell you, and which codes in circulation do not exist.

    14 min read

  • Who actually gets your solar alerts? A 10-minute audit for SolarEdge, Enphase and Growatt owners

    • Monitoring & alerts
    • SolarEdge
    • Enphase
    • Growatt

    SolarEdge, Enphase and Growatt all built their alerting for installers. This audit shows, per brand, where the alert settings live, what the documented thresholds are, whose inbox the messages go to, and how to get owner access when the installer holds the account.

    12 min read

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