Called back within a day and gave good advice.
Rob and Sue Dempster · Jun 2026 Google
Fault guide · GivEnergy AIO & hybrid
GivEnergy Inverter Not Turning On — No Display, Won't Start
A blank display, a system that won't restart after a power cut, or an inverter that clicks and stops — none of these automatically mean the unit is dead. Most GivEnergy startup failures have a recoverable cause. This guide works through the checks in the right order, starting with the most common and safest to check yourself.
Free remote diagnostic · pay only if we fix it — from £75 if remediable remotely
- Isolator checks and battery restart covered
- Deep discharge recovery explained
- Firmware failure and fault codes included
Inverter completely dead or won't recover?
If you've checked all isolators, the battery has charge, and the system still won't start — the fault is likely hardware or a failed firmware flash. We diagnose remotely first to rule out recoverable faults, then scope an engineer visit only if hardware is confirmed faulty.
Book your free remote diagnosticCAN communication fault guideIndependent — not affiliated with GivEnergy Ltd.
I've spoken to Ron a couple of times with issues with my Givenergy installation. Such a friendly knowledge guy very highly recommended. Thank you very much for resolving my issues
michael fairhurst · May 2026
Excellent response to diagnose a problem on our SolarEdge installation. Kept us informed at every step. Diagnosis quickly completed and solution implemented.
Les Bennett · May 2026
Ron made more sense in 20 mins than our installer has done over the last 12 months There is a jungle out there and you need someone like Ron to give a comprehensive overview and solution
David · May 2026
A superb service from Ron who went beyond the normal service received from other Tech support companies. I live abroad and was badly let down when my givenergy system failed (and the company went bankrupt) and the local supplier ran away from the problem. Ron sorted the problem and even accessed specialist coding for the inverter that would not be available for suppliers. Ron also ran a full diagnostic to insure that all was in good working order afterwards. Without Rons support and patient assistance I doubt I would ever have got the system back up and running. Well done and thankyou and you have a customer for the future.
Philip Davey · Jun 2026 Google
My GivEnergy hybrid inverter + battery system had worked faultlessly for 3 years when it suddenly stopped charging and discharging the battery. On contacting my supplier, who had used a sub-contractor for the installation work, I was provided with an email address at GivEnergy but, as it turned out, this is only for GivEnergy Software who are not able to assist. A Google search led to the Solar Tech Support web site, which contains a wealth of helpful information. I requested a remote solar diagnostic, and after providing Ron access to my inverter, he was able to identify and fix the problem within minutes. I am very impressed by Ron’s expertise and knowledge, which included useful information on the current state of GivEnergy Ltd. I would thoroughly recommend Solar Tech Support.
Simon Riddle · Jun 2026 Google
First checks
Start here
Safe checks before calling an engineer
Most GivEnergy startup failures are caused by one of three things: an isolator in the wrong position, a battery that needs restarting, or a battery that has deeply discharged. These are all safe to check yourself before escalating.
Check 1
AC isolator — ON?
The AC isolator (red or black rotary switch near the inverter) must be in the vertical/ON position. Also check the MCB labelled "Solar" or "Inverter" in your consumer unit — it must not be tripped. A tripped MCB is a common cause of complete system shutdown after a fault or surge.
Check 2
Battery isolator — UP?
The green battery isolator handle on the side of the battery cabinet must be in the UP position. If it is horizontal or pointing down, the battery is disconnected from the inverter. Lift it to the UP position, then press the battery restart button (hold for 3–5 seconds) if the battery LEDs are not illuminated.
Check 3
Battery charge — above 0%?
A GivEnergy battery that has discharged to 0% and sat empty for several days may enter deep discharge protection — a safety state where it will not start normally. If this has happened, the recovery path depends on whether solar generation is available. See the deep discharge section below.
Before touching any isolators: Only switch isolators that are in the OFF position back ON. Do not switch isolators that are currently ON to OFF and back on again unless you have confirmed there is no active fault. If a circuit breaker trips again immediately after resetting, stop — there is a wiring fault that requires a qualified electrician.
Startup sequence
Procedure
Correct GivEnergy restart sequence
If the system has been fully powered down, the restart sequence matters — energising components in the wrong order can cause grid detection errors or communication faults. The correct sequence differs between AIO and Hybrid systems.
AIO (All-in-One) restart
1Turn on the DC MCB (inside the DC cover on the AIO unit) — push up to ON, then close the cover
2Press and hold the small button to the right of the DC cover until the front status light appears
3Rotate the AC isolator from circle (off) to line (on) — vertical position
Hybrid / AC-Coupled restart
1Rotate the AC isolator from circle (off) to line (on)
2Push the battery DC MCB up to ON (inside the battery flap), close the cover
3Press and hold the battery button until you hear a beep and the LEDs illuminate
4Gen 3 only: flip the inverter toggle switch to ON
After restart: Wait 5–10 minutes before checking the app or portal. A blank display during the first 60–90 seconds is normal — do not interrupt. Battery LEDs should be green (operating normally). If all LEDs are red or no LEDs respond, the battery has a fault — see the fault diagnosis section below. The PV solar isolator should also be in the ON position for solar generation to begin.
Fault causes
Diagnosis
What causes a GivEnergy inverter to not start?
If the basic checks haven't resolved the issue, the cause falls into one of these categories. The display state is the most important diagnostic signal.
Completely blank display — no LEDs, no response
Power supply faultMost likely causes
→ AC isolator or MCB off/tripped
→ Battery completely discharged (deep discharge)
→ Internal power supply failure (requires engineer)
→ Failed firmware flash leaving unit non-bootable
Action
Confirm all isolators are ON, the MCB hasn't tripped, and the battery has been restarted. If everything checks out and the display is still blank, this is an engineer job — do not attempt to open the unit.
Display shows fault code, system won't generate
Fault stateMost likely causes
→ Grid voltage or frequency out of range
→ DC isolation fault (F04) — safety shutdown
→ CAN bus communication error with battery
→ BMS alarm on battery unit
Action
Note the exact fault code from the display or portal and look it up in the GivEnergy fault code index. DC isolation faults (F04) indicate a potential wiring insulation fault and must not be reset without an inspection.
Clicking noise on startup — system doesn't progress
Grid detection issueMost likely causes
→ Grid overvoltage (above 253V)
→ Loose or intermittent AC connection
→ Grid frequency out of range (rare in UK)
→ Relay chatter fault requiring engineer reset
Action
If accessible, check the grid voltage on the inverter display or portal. Persistent clicking at correct grid voltage indicates a relay or internal fault — contact STS for a remote diagnostic before booking an engineer visit.
Inverter starts but generates no power, no output
Configuration issueMost likely causes
→ Battery paused in the app or portal
→ System mode set to "Off" or "Standby"
→ Export limit set to 0W (blocks all output)
→ Smart tariff lockout holding the system inactive
Action
Check the portal Remote Control page — confirm Pause Battery shows Not Paused, system mode is set to Normal, and the export limit is not 0W. If a smart tariff has control, see the smart tariff lockout guide.
After a power cut
Power cut recovery
GivEnergy not restarting after a grid outage
GivEnergy inverters are designed to restart automatically when grid supply is restored. When this doesn't happen, one of three conditions is usually preventing it.
AC isolator or MCB tripped during the outage
Power surges at the moment of grid restoration sometimes trip MCBs. Check the consumer unit — reset any tripped breakers. If the MCB trips again on reset, there is a wiring fault on that circuit that needs electrical inspection before the inverter is energised again.
Battery discharged to 0% during the outage
If the power cut was long and the battery ran down to 0%, the BMS enters deep discharge protection. The inverter cannot restart normally in this state. During daylight hours with solar available, the system may recover autonomously as the solar input charges the battery above the minimum recovery threshold (typically around 5%). At night with no solar, an engineer visit with specialist equipment may be needed to initiate a controlled recovery charge.
Grid frequency or voltage instability at restoration
Immediately after grid restoration, voltage and frequency can be briefly unstable as load reconnects across the network. GivEnergy inverters include a 5-minute settling delay before reconnecting to a restored grid (required by UK G98/G99 regulations). Wait 5–10 minutes after the grid is restored before concluding the inverter hasn't restarted. If the inverter still hasn't started 10 minutes after grid restoration, check the display for fault codes.
Fault codes
Fault codes
Fault codes that prevent GivEnergy from starting
If the inverter display or portal shows a code, match it to this table. Some codes are recoverable; others require an engineer.
| Code | Meaning | Recoverable? | Action |
|---|---|---|---|
| F01 | Grid voltage out of range | Often yes | Check grid voltage. Persistent F01 above 253V — notify DNO |
| F04 | DC isolation fault (insulation failure) | Engineer required | Do not reset. Potential wiring insulation issue — inspection required |
| F11 | Bus voltage fault (DC bus) | Sometimes | Full restart sequence. Persistent F11 — engineer diagnostic |
| F13 | Inverter overtemperature | Yes — wait & cool | Ensure ventilation around unit. Clears once temperature drops |
| E-series | Communication errors (battery/dongle) | Often yes | Full restart. Check CAN cable connections if persistent |
| BMS alarm | Battery management system fault | Varies | Retrieve specific alarm from portal. Do not force restart if red LED active |
For the complete fault code reference including all F-codes, E-codes, and BMS alarm numbers, see the GivEnergy fault code index. If you can see a code but it isn't in the table above, look it up there for the specific recovery path.
When to escalate
Escalate
When to call STS — beyond the self-help steps
The diagnostic steps above resolve a large proportion of GivEnergy startup failures — isolator positions, deep discharge recovery, startup sequence, and fault code identification. If you have worked through all the steps and the inverter still won't start, or if a fault code persists after a controlled restart, the root cause is likely a hardware failure that requires a professional assessment.
Call STS immediately — safety-critical faults
→F04 isolation fault — do not attempt to restart. Indicates a DC wiring fault that requires inspection
→Burning smell, visible scorch marks, or evidence of arcing — isolate at consumer unit immediately
→MCB trips immediately on reset — indicates a fault on the AC wiring side, do not re-energise
→Battery enclosure is hot to the touch, swollen, or smells unusual — do not attempt to restart
Call STS after exhausting self-help steps
→Display completely blank after confirming all isolators on and battery has charge
→Failed firmware update — inverter in non-bootable state, blank or frozen display
→F11 (bus voltage fault) or persistent BMS alarm code that doesn't clear after restart
→Battery deeply discharged with no solar available — recovery requires controlled charge procedure
→Inverter powers on but produces no output and no fault code is shown
Remote diagnostic — we assess before sending an engineer
A remote session establishes whether the fault is recoverable without a site visit — retrieving portal event logs, fault history, and last-known system state. We confirm whether hardware failure has occurred before committing to an engineer visit. Most GivEnergy startup faults are diagnosed in a single remote session — free; £75 only if we fix it.
Related GivEnergy pages
GivEnergy fault code index
Full reference for all F-codes, E-codes, and BMS alarm numbers with actions.
Full restart procedure
Correct shutdown and restart sequence for AIO and hybrid systems.
CAN communication fault
E-series communication faults between inverter and battery — causes and fixes.
DC MCB tripping
Battery isolator keeps tripping — cable termination or buck-boost MOSFET failure.
Remote Diagnostic
Can't get it started? Let's diagnose it properly.
If you've worked through the isolator checks and battery restart and the system still won't start, the fault is likely hardware, firmware, or a deep discharge recovery situation. We run a remote diagnostic first — accessing portal data and fault history — before recommending an engineer visit. This prevents unnecessary call-outs when the fault can be resolved remotely.
Portal fault history and alarm codes reviewed
Firmware failure vs hardware fault identified
Engineer visit only scoped if remote confirms hardware fault
Free
Remote diagnostic. If an engineer visit is needed, it's quoted up front; if we fix it remotely, that's a flat £75.
Book Remote DiagnosticIndependent — not affiliated with GivEnergy Ltd.
GivEnergy inverter not turning on — questions
Not necessarily. A blank display most commonly means a power supply issue rather than a failed inverter. Check the AC isolator (must be ON), the MCB in the consumer unit (must not be tripped), the battery isolator handle (must be UP/ON), and whether the battery has any charge. If all isolators are correct and the battery has charge but the display is blank, it may be a firmware failure or internal power supply fault — this requires an engineer visit.
First wait 5–10 minutes — GivEnergy inverters have a mandatory grid reconnection delay after supply is restored. If still not started after 10 minutes: confirm the AC isolator is ON and the MCB hasn't tripped, check whether the battery discharged to 0% during the outage, and press the battery restart button if the battery LEDs are off. If the battery is at 0% with no solar available, recovery may require a controlled charge — contact STS for a remote diagnostic.
A red light indicates the battery is in a fault or protection state — BMS communication fault, overtemperature protection (below 0°C), cell voltage imbalance, or deep discharge protection. Do not attempt to open the battery. Press the battery button to attempt a restart. If the red light persists, retrieve the specific alarm code from the portal to identify whether it is recoverable or requires replacement.
Yes. A firmware update interrupted by a power cut, internet dropout, or corrupted download can leave the inverter in a non-bootable state with a blank or frozen display. Recovery from a failed firmware flash requires either a factory recovery via a USB tool (carried out by an engineer) or in severe cases, board replacement. Do not attempt to restart the update if the inverter is in this state — contact STS or GivEnergy support immediately.
No — do not attempt to reset an F04 fault. F04 is a DC isolation fault, meaning the inverter has detected that the insulation resistance between the PV DC circuit and earth has fallen below a safe threshold. This is a safety fault indicating a potential insulation failure in the DC wiring — typically a damaged cable, a faulty panel junction box, or water ingress into a connector. The system must remain offline until a qualified electrician inspects the DC cabling. Resetting without inspection carries a real risk of electric shock or fire.
The remote diagnostic is free — send us the fault code and what the display and battery LEDs are doing, and we'll work out whether it is recoverable at no charge. If we can bring it back remotely — a guided restart sequence, a deep-discharge recovery, or sorting a settings or firmware issue — that's a flat £75, and if we can't fix it remotely there's nothing to pay. If the diagnosis points to a genuine hardware fault — a failed board or a dead unit — that needs an on-site visit, quoted up front from £245, with a full inverter replacement from £1,495 only if the unit has actually failed. You'll always know the price before any work starts. Full pricing →
If it is recoverable remotely, usually the same day — many no-start faults are a missed step in the restart sequence, a tripped MCB, or a battery that has dropped into deep-discharge protection, and those we can talk you through in a single session. Deep-discharge recovery can take longer because the battery has to be brought back up safely, sometimes over a daylight cycle from solar. If it turns out to be a hardware or failed-firmware fault that needs an engineer, we'll book the earliest visit rather than leave you without power.
Book
Inverter still won't start? Let us investigate.
If you've worked through the isolator checks and battery restart and the system still won't power up, we can review your fault codes and DC isolator status remotely to diagnose whether it's a firmware issue, hardware fault, or deep discharge recovery situation.
- Not affiliated with GivEnergy Ltd
- No fix, no fee
- Fault code and DC isolator review
GivEnergy support — STS
GivEnergy problems? No fix, no fee.
I’ve worked on hundreds of GivEnergy systems and know the kit inside out. If yours is playing up, my promise is simple — no fix, no fee: just £75 if we fix it, free if we don’t.
Ronald Director, Solar Tech Support
Remote first — most GivEnergy faults are solved without a site visit
Every GivEnergy unit — Hybrid, AC, AIO and three-phase inverters & batteries
Engineer-led — a direct line to someone who knows the kit inside out
We use cookies to measure traffic and improve our ads — including sharing limited, hashed details with Meta (Facebook) to measure ad performance. Accept, or decline for essential cookies only. Privacy policy
STS Solar Tech Support
Usually replies within minutes
Hi there!
Got a solar fault or need a quick answer? Drop us a message — we usually reply within a few minutes. Mon–Fri, 9am–7pm.
Start WhatsApp Chat
Got a solar fault or need a quick answer? Drop us a message — we usually reply within a few minutes. Mon–Fri, 9am–7pm.
End-to-end encrypted