Warning

W07

Low battery.

5 Devices that report this code

What does the W07 error code mean?

W07 on a Felicity unit indicates: Low battery.. It is a warning-severity event that can appear on 5 different devices in the Felicity catalog. The same code may have slightly different recommended fixes depending on the device — the per-device sections below show the exact wording from each device's official manual.

This is a warning-level code

Warning codes do not stop the unit. They flag a condition that should be addressed before it escalates — usually a near-threshold reading or a configuration check.

What triggers this code

W07 is triggered when the unit's protection or monitoring logic detects the specific condition described above. The exact trigger depends on the device — see the per-device sections for the official manual entry for each.

Apollo-5KLP1G01-MXEnergy storage system↗ view on device
W07Low battery.Warning
Description

Low battery warning shown on LCD with flashing error icon.

Cause

The battery voltage is too low.

Recommended fix

It should be charging.

Source:Apollo-5KLP1G01-All-in-one-ESS-User-Guide.pdf · page 42
IVEM8048-IIInverter↗ view on device
W07Generator anomaly.Warning
Description

Warning: Generator anomaly. Generator icon blinking.

Cause

Generator input is over voltage or over frequency.

Recommended fix

Check whether the input is overvoltage or overfrequency.

Source:IVEM8K-12K-II_compressed.pdf · page 42
T-REX-10KHP3G01Inverter↗ view on device
W07Low battery.Warning
Description

Low battery warning indicated on LCD with flashing fault LED.

Cause

The battery voltage is too low.

Recommended fix

Battery should be charging.

Source:T-REX-10KHP3G01-Inverter-User-Guide.pdf · page 27
T-REX-10KLP3G01Inverter↗ view on device
W07Low battery.Warning
Description

Low battery warning indicated on LCD with flashing fault LED.

Cause

The battery voltage is too low.

Recommended fix

Battery should be charging.

Source:T-REX-10KLP3G01-Inverter-User-Guide.pdf · page 27
T-REX-50KHP3G01Inverter↗ view on device
W07High voltage ride through alarm.Fault
Description

Entering high voltage ride-through at grid connection, the inverter sends reactive power to the grid.

Source:T-REX-50KHP3G01-user-manual-.pdf · page 44

Frequently asked about W07

What is the W07 error on Felicity?
W07 on a Felicity unit means: Low battery.. It can appear on 5 different devices in the Felicity catalog. The cause and recommended fix are listed for each device on this page.
Can I clear the W07 code myself?
It depends on the severity. Warning-level codes can usually be cleared by following the recommended fix. Fault and critical codes often require checking the source condition first; if the code returns immediately after restart, escalate to authorized service.
Is the W07 fix the same on every device?
The cause is consistent — it's the same protection logic. The exact fix wording can differ per device because each official manual addresses model-specific context (input ranges, parallel-config notes, firmware revisions). Use the per-device section that matches your unit.
Where does this information come from?
Every entry is sourced directly from the official Felicity user manual for the affected device. The "Source" line at the bottom of each device's section shows the manual filename and page number.

Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.