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Fault code index · GivEnergy inverter & battery

GivEnergy Fault Code Index

Every GivEnergy fault code from the portal event log — what it means, the most likely cause, and what to do. Find your code in the index below or use the category sections to browse by system area.

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Sourced from GivEnergy's commissioning fault code list Linked to full diagnostic guides where available All GivEnergy hybrid models and battery generations

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Inverter / AC Battery / BMS EPS / Backup Grid voltage Solar / PV Communication Power logic
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GivEnergy hub CAN comm fault Red light Battery not charging EPS not working Firmware Portal offline Export limit
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How to find your fault code. Log into givenergy.cloud → My Inverter → Event Log. The event log shows fault codes with timestamps. Note the exact code — including the prefix (INV_, STORAGE_WARN_, STORAGE_ERROR_) as this indicates severity and which component is affected. WARN codes are warnings; ERROR codes are active faults that have caused the system to stop or limit operation.
Inverter & AC faults

Fault codes generated by the inverter in response to AC supply problems, DC overvoltage from panels, or ground faults. These typically cause the inverter to stop generating.

INV_NO_UTILITY Hybrid inverter — no AC supply
No AC supply detected at the inverter. Check the AC isolator below the inverter is switched on. Check for tripped breakers at the consumer unit on the solar circuit. Check AC terminal connections are tight.
STORAGE_ERROR_NO_UTILITY Storage variant — no AC supply
Same as INV_NO_UTILITY on storage/AIO models. AC supply not detected. Check isolator, consumer unit breakers, and AC connections at the inverter terminals.
INV_PV_OVER_VOLTAGE Hybrid — DC overvoltage
String voltage from solar panels exceeds 580V DC. Do not touch DC cabling. Requires an engineer to check the panel string configuration. May indicate panels wired in an incorrect series configuration.
STORAGE_ERROR_PV_OVER_VOLTAGE Storage variant — DC overvoltage
Same as INV_PV_OVER_VOLTAGE on storage models. String voltage exceeds 580V DC. Do not touch DC cabling — contact a qualified engineer.
INV_GFCI_FAULT ⚠ Ground fault — urgent
Ground fault detected — DC voltage present on the earth conductor. Isolate the system at the consumer unit immediately. Do not touch any DC cabling. Contact a qualified engineer before any restart. Red light guide →
STORAGE_ERROR_GFCI_FAULT ⚠ Ground fault — urgent
Ground fault on storage/AIO model. Same response as INV_GFCI_FAULT — isolate at consumer unit, do not touch DC cabling, contact a qualified engineer.
INV_OVER_TEMPERATURE Inverter over temperature
Inverter heatsink temperature has exceeded its safe operating threshold. Check ventilation clearances — minimum 20cm from walls, no direct sunlight, not enclosed in a sealed cabinet. Clear any dust from heatsink vents. If ambient conditions are within range and vents are clear, the internal fan may have failed and will require a service call.
Battery & BMS faults

Fault codes from the battery management system (BMS) — covering communication failures, voltage protection events, and state-of-charge alarms. Many of these appear alongside a red status light on the battery.

STORAGE_WARN_BMS_COM_FAIL Warning — BMS comms lost
Inverter has lost communication with the battery BMS. Check the CAN communication cable between inverter and battery is connected correctly at both ends and the polarity is correct. Try a full power cycle. Full CAN fault guide →
STORAGE_ERROR_BMS_COM_FAIL Error — BMS comms failed
Persistent BMS communication failure — the warning escalated to an error. The battery has stopped responding to inverter requests. Check CAN cable, power cycle the system, check for BMS firmware mismatch. Full CAN fault guide →
STORAGE_WARN_BMS_UNDER_VOLTAGE Warning — battery voltage low
Battery voltage is critically low. Ensure the battery is switched on (press side button until LEDs illuminate) and the first SoC LED is green. Check the DC MCB between inverter and battery is in the ON (up) position.
STORAGE_ERROR_BAT_UNDER_VOLTAGE_FAULT Error — voltage below minimum
Battery voltage has dropped below the safe minimum threshold — BMS has entered protection. Often caused by deep discharge during EPS operation or a prolonged grid outage. May require slow recovery charge — contact GivEnergy support. Battery fault guide →
STORAGE_WARN_BATTERY_SOC_LOW Warning — state of charge low
Battery state of charge is critically low. Ensure the battery is switched on. Check the discharge cut-off SoC setting in Battery Options — if set too high the battery may be stopping discharge before it should. If SoC is genuinely low, allow a charge cycle to complete.
STORAGE_WARN_BATTERY_VOLTAGE_LOW Warning — voltage low
Battery voltage is low. Ensure the battery is switched on and the DC MCB is in the ON position. If the battery is on but voltage remains low after a charge period, contact GivEnergy support.
STORAGE_WARN_BMS_SHORT_CURRENT_DISCHARGER ⚠ Polarity fault — do not touch
Polarity error detected on the battery DC cables. Do not touch any DC cabling. This indicates the positive and negative DC connections at the battery or inverter may be reversed. Requires a qualified engineer to check and correct DC cable polarity.
STORAGE_ERROR_OVER_TEMPERATURE Battery over temperature
Battery cell or BMS temperature has exceeded its safe limit. The BMS will suspend charging and discharging to protect the cells. Ensure the battery is not in direct sunlight and has adequate ventilation. Do not attempt to charge the battery. If the battery is in a cool location and the fault persists after the unit returns to ambient temperature, contact GivEnergy support — a BMS or cell fault may be present.
EPS & backup faults

Fault codes related to the EPS (Emergency Power Supply) backup function.

STORAGE_ERROR_BACKUP_OVERLOAD_FAULT Error — EPS overload
The load connected to the EPS backup circuit exceeds the inverter's EPS power rating (typically 3kW on Gen 2, 6kW on Gen 3/AIO). Reduce the load on the backup circuit — remove high-draw appliances such as electric showers, kettles, or ovens. EPS circuit wiring changes require a qualified engineer. EPS guide →
Grid voltage

Events triggered by grid voltage being outside the inverter's acceptable operating range. These cause the inverter to disconnect from the grid as required by G98/G99 protection settings.

Grid voltage too high Overvoltage disconnect
Grid AC voltage exceeded the upper threshold (typically 253V on a 230V supply). Check the AC isolator is on and connections are tight. If connections are sound, the issue is with the grid supply — contact your DNO. Common on sunny days in areas with high solar density. Grid overvoltage guide →
Grid voltage too low Undervoltage disconnect
Grid AC voltage dropped below the lower threshold. Check AC isolator and connections. If connections are sound, contact your DNO — the grid supply at your property is outside acceptable limits.
Solar / PV faults

Commissioning checks and faults related to solar PV generation being absent or unreadable.

PV generation not detected Commissioning check
No PV generation detected during commissioning check. Confirm the string inverter or DC input is switched on and generating. For hybrid models, confirm the PV string is connected to the correct input. Ensure the PV CT clamp (if fitted for AC-coupled systems) is positioned correctly on the generation cable.
Battery requires minimum generation Activation threshold
The inverter requires a minimum of 180W generation to activate battery charging from solar. Retry the commissioning check at a time of adequate solar generation — not at night or in very low irradiance conditions.
Communication faults

Faults related to data communication between components — portal connectivity, meter communication, and monitoring data gaps.

ELECTRICITY_METER_COM_FAIL Meter communication lost
Communication with the electricity meter (EM115 or similar) has failed. Ensure the meter communications cable is stable and connected to the correct socket on the underside of the inverter. Check that meter polarity (power and communications) is correct.
Data Point not created recently Portal data gap
The portal has not received data from the dongle recently. Check the dongle LED — it should be solid (not flashing). A flashing LED indicates WiFi connection loss. A solid LED with no data indicates a cloud connectivity issue. Portal offline guide →
Meters not enabled Commissioning — meter setup
Meters have not been enabled in the commissioning portal. Go to My Inverter → Remote Control → Enable Meters, and enable the number of meters installed. This is typically an installer commissioning step rather than an end-user action.
Home CT — CT1 direction CT clamp orientation
The ID1 CT clamp is not facing towards the consumer unit. The directional arrow on the CT body must point toward the consumer unit on the main supply cable. A reversed CT causes inverted import/export readings. CT clamp guide →
Power logic faults

Commissioning-level checks that confirm the battery is charging and discharging correctly. These appear in the commissioning portal rather than the end-user event log.

battery-not-charging Commissioning check
Battery is not charging from excess solar generation. Try restarting the inverter and battery. If the fault persists, check system mode settings and CT clamp orientation. Battery not charging guide →
battery-not-discharging Commissioning check
Battery is not discharging to meet house demand. Try restarting the inverter and battery. Check system mode, discharge cut-off SoC setting, and that the CT clamp is reading the correct circuit.
Code not listed here?

GivEnergy add new fault codes with firmware updates. If your code isn't listed, share the exact code from your event log and we'll identify it. GivEnergy support at support@givenergy.co.uk also maintains an up-to-date list.

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Full diagnostic guides by fault type
STORAGE_WARN/ERROR_BMS_COM_FAIL
CAN communication fault

Full diagnostic — power cycle, cable checks, BMS lockout, firmware mismatch, hardware fault.
Red status light · battery alarms
Red light & battery fault codes

What each battery and inverter status light means, and which fault codes accompany each.
battery-not-charging · system mode
Battery not charging overnight

System mode, CT clamp, SoC limits, tariff settings, and firmware resets.
STORAGE_ERROR_BACKUP_OVERLOAD_FAULT
EPS not working

EPS disabled, no circuit, low SoC, and overload — all causes covered.
Data Point not created · dongle
Portal offline

WiFi lost, cloud outage, firmware broke connectivity, GivHub fault, port 7654.
CT1 direction · inverted readings
CT clamp direction

Diagnosing and fixing a backwards CT clamp from portal data alone.

GivEnergy fault code questions

Fault codes appear in the portal event log. Log into givenergy.cloud, click My Inverter, then select Event Log. Codes appear with a timestamp and severity level — copy the exact code string before contacting support or searching this index.

A power cycle (AC isolator off, wait 60 seconds, back on) clears many transient codes such as temporary grid voltage events or communication glitches. However, if the same code returns after a restart, the fault is persistent — repeated restarting will not fix it. Check the code in this index first to understand what it indicates before cycling power.

Firmware updates can reset system settings to defaults, introduce new compatibility requirements, or contain bugs that trigger codes that did not previously appear. If fault codes started after a firmware update, check whether your system mode, charge schedule, export limit, or CT direction were reset. Restoring settings often clears associated fault codes immediately.

Contact STS for a diagnostic assessment. GivEnergy systems log detailed fault history in the portal, which our engineers can analyse remotely from £75 to identify the issue before arranging any on-site work.

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