If your GivEnergy inverter or battery has thrown up a fault code, don’t panic — most GivEnergy errors are protective measures rather than signs of a broken system. This guide walks you through the most common GivEnergy fault codes, what they mean, and when you need to call in a professional.
How GivEnergy Fault Codes Work
GivEnergy inverters across the Gen 1, Gen 2, Gen 3, and All-in-One (AIO) ranges use a prefix-based code system, with codes visible both in the MyGivEnergy portal and on the inverter’s LED or LCD display. Broadly, codes fall into a few families:
- F-codes – Faults where the inverter has stopped generating in response to a measured issue. Most will auto-retry after a short delay.
- E-codes – Communication and internal errors, often related to the battery or dongle connection.
- Named codes (like
INV_NO_UTILITYorSTORAGE_ERROR_PV_OVER_VOLTAGE) – Used in the newer portal event log and colour-coded by severity: critical (red) codes may indicate live-DC or BMS protection events and mean you should not open the unit, warning (amber) codes are protective, and info (green) codes are typically commissioning or transient events.
Where to Find Your Fault Code
A blank display, a system that won’t restart after a power cut, or an inverter that clicks and stops don’t automatically mean the unit is dead — most GivEnergy startup failures have a recoverable cause. To find the exact code:
- Log into the MyGivEnergy app or web portal.
- Navigate to your device and open the Fault Log or Alarms tab, which shows a timestamped history of fault events.
- Alternatively, check the inverter’s LED display, which will show an active fault code — typically an “F” followed by two digits.
Common GivEnergy Fault Codes Explained
F01 — Grid Over-Voltage
Mains voltage has risen above roughly 253V, often because of poor grid quality or nearby solar generation pushing local voltage up. Under UK grid code G98/G99, GivEnergy inverters must disconnect and stop generating if the grid voltage rises above 253V — this is not a fault as such, but mandatory protection, though it can cause real lost generation in areas with dense solar installations. If it happens repeatedly, note the times and voltages and report it to your District Network Operator (DNO).
F02 — Grid Under-Voltage
The opposite problem: mains voltage has dropped below the safe threshold (around 216V). This is usually a supply quality issue on the grid side rather than a fault with your system.
F04 — DC Isolation Fault
This indicates a potential wiring insulation fault and must not be reset without an inspection. Don’t reset it yourself — it indicates a DC insulation failure and needs a professional inspection.
F11 — Bus Voltage Fault
A DC bus voltage fault that is sometimes recoverable with a full restart sequence, though persistent occurrences need an engineer diagnostic.
F13 — Inverter Overtemperature
This is usually recoverable by waiting for the unit to cool, and clears once temperature drops. Check that:
- Ventilation clearances around the unit match the installation manual
- The inverter isn’t in direct sunlight or an enclosed cabinet
- Heatsink vents are free of dust
E12 / E-Series Codes — Battery Communication Errors
E-codes typically relate to communication problems between the inverter and battery, or with the WiFi dongle. A CAN bus error, firmware mismatch, or loose cabling can all trigger these.
PV Over-Voltage
(INV_PV_OVER_VOLTAGE / STORAGE_ERROR_PV_OVER_VOLTAGE)
String voltage from the solar panels exceeds the inverter’s limit — 580V on Gen 1, Gen 2 and Gen 3 3.6/5.0 hybrids, or 600V on the Gen 3 8.0. This is a critical code: do not touch the DC cabling, and an engineer needs to check the panel string configuration.
No AC Supply
(INV_NO_UTILITY / STORAGE_ERROR_NO_UTILITY)
No AC supply has been detected at the inverter. Before assuming the worst, check that:
- The AC isolator below the inverter is switched on
- No breakers have tripped at the consumer unit on the solar circuit
- AC terminal connections are tight
Inverter Over Temperature (Info-Level)
This occurs when the inverter heatsink temperature exceeds its safe operating threshold. Check ventilation clearances, make sure the unit isn’t in direct sunlight or a sealed cabinet, and clear dust from the heatsink vents — if ambient conditions are fine and vents are clear, an internal fan may have failed.
| Code | Meaning | Can You Fix It Yourself? |
|---|---|---|
| F01 | Grid over-voltage | Usually auto-recovers; report to DNO if frequent |
| F02 | Grid under-voltage | Usually auto-recovers; check connections if persistent |
| F04 | DC isolation fault | No — engineer required |
| F11 | Bus voltage fault | Sometimes, with a restart |
| F13 | Inverter overtemperature | Yes — improve ventilation, wait to cool |
| PV Over-Voltage | Panel string voltage too high | No — engineer required |
| No AC Supply | AC isolator/breaker issue | Yes — check isolators and connections |
| Battery comms fault | CAN bus/WiFi issue | Sometimes — check cables, restart |
Reading the Status Light
Alongside fault codes, the LED status light on your inverter or battery gives a quick visual health check:
A solid green light means normal operation with no action needed. Flashing green means the unit is starting up or communicating, so it’s worth waiting a couple of minutes for it to stabilise. Solid amber or orange indicates a warning condition — check the portal event log for the specific code. A solid or flashing red light signals an abnormal or fault condition, and no LED at all usually means the inverter isn’t receiving power, so the first check should be the AC isolator.
When to Call a Professional
Some fault codes are safe to investigate and clear yourself; others are safety-critical and should be left to a qualified engineer. Situations that warrant calling in an expert rather than resetting the system yourself include an F04 isolation fault code in the portal, a PV circuit breaker that trips immediately on reset, any burning smell, discolouration or scorch marks near the inverter or isolators, and zero generation immediately after roofing or building work, which could mean cable damage.
As a general rule: DC-side faults (isolation, over-voltage) and anything involving burning smells or physical damage are never a DIY job. AC-side and connectivity issues are usually safe to check yourself first.
Can Your GivEnergy Battery Be Repaired?
A battery throwing fault codes doesn’t automatically mean it’s due for landfill. At Recover, we successfully repair more than 60% of the batteries that come through our doors — from CAN bus communication faults and BMS lockouts to cell-level issues that many installers would simply write off as beyond economical repair. Email us at info@eco-recycle.co.uk
