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Side LED flashing rapidly

Tesla Powerwall

Tesla Powerwall Side LED flashing rapidly

Enabled but lost gateway communication

Severity

Moderate

Safe to continue?

Temporarily

Technician required?

Recommended

Last verified

September 2026

First safe check

Check the home internet connection and whether the gateway reports other devices as offline.

What does Side LED flashing rapidly mean?

A rapidly flashing side LED on a Powerwall 2 indicates the unit is powered and enabled but has lost communication with the energy gateway. System management functions such as mode changes and monitoring can be impaired while this persists.

Which models use this code?

Verified for

  • Tesla Powerwall

Not yet verified for: individual model series. This code is recorded at brand level until a document confirms it per family.

Most likely causes

01

Gateway communication lost

Manufacturer documented

The battery is enabled and powered but cannot exchange data with the gateway.

02

Network or gateway-side change

Possible

Router changes and gateway restarts commonly interrupt this link.

Safe checks you can perform

  1. 1

    Check the home network

    Confirm other devices on the network are online.

  2. 2

    Check gateway status

    Note whether the gateway shows its own fault or offline state.

These steps stay outside the enclosure. Never open high-voltage equipment, bypass safety devices or work on live wiring.

When to stop troubleshooting

Stop and contact a qualified technician if the fault returns immediately, the device smells burnt, visible wiring damage exists, the enclosure is hot to the touch, or the manufacturer specifies professional service.

Can a reset clear this fault?

Reset behaviour is not documented for this code. Use only the manufacturer-approved restart sequence described in the device manual, and treat a code that returns immediately as an unresolved fault rather than a reset problem.

Related symptoms

Gateway offlineDevice offline

Related fault codes

Flashing red logoInverter fault (AFCI, GFCI or RSD)Flashing white logoIdle; entering sleep stateSide LED flashing slowlySolar input below 30 VSolid white logoNormal operation

Sources

  • Tesla Powerwall 2 Owner’s Manual

    View
    Manufacturer
    Tesla Powerwall
    Document version
    —
    Section / page
    LED states
    Verified
    September 2026

    A rapidly flashing side LED indicates the unit is enabled but has lost communication with the gateway.

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Disclaimer

EnergyFaults provides informational troubleshooting guidance. Electrical and high-voltage equipment should only be serviced by qualified professionals where required. Always follow the manufacturer documentation for your exact model.