How to restart a GivEnergy battery
A battery-only restart clears BMS communication faults, resets stuck SoC readings, and resolves LED fault conditions — without a full system power-down. Covers Gen 2, Gen 3, and AIO systems.
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If a fault code or battery issue reappears within minutes of a restart, the underlying cause needs diagnosing. We can read your event log and live data remotely — usually faster than GivEnergy support queues.
Book Remote Diagnostic — from £75 → CAN communication fault guideNot affiliated with GivEnergy Ltd. Independent diagnostic support.
Battery restart vs full system restart
A battery-only restart is quicker and less disruptive — no isolators to touch, no interruption to solar generation. Use it first. Only escalate to a full system restart if the battery-only restart doesn't resolve the issue.
Try battery restart first for
Escalate to full system restart if
Battery restart — GivEnergy Hybrid (Gen 2 and Gen 3)
On Hybrid systems the battery unit is separate from the inverter. The on/off button is on the front or side of the battery enclosure.
Battery restart steps
Locate the on/off button on the GivEnergy battery unit — usually on the front panel or right-hand side. Press and hold for 3–5 seconds until you hear a beep and all LED indicators go out. The battery is now off. Do not proceed until all lights have extinguished.
Allow 30 seconds for the BMS capacitors to discharge fully. This ensures a clean restart rather than just a brief power interruption. The inverter will report battery communication loss during this period — this is expected.
Press and hold the same button until you hear a beep and the LEDs illuminate. On Gen 2 and Gen 3 batteries, the LEDs will cycle through a startup sequence before settling on the current SoC indication. This takes up to 60 seconds.
The battery reconnects to the inverter over the CAN bus. Allow 2–3 minutes, then check MyGivEnergy — the battery SoC should update and any previous communication fault should clear. If the fault code reappears within 5 minutes, move to a full system restart.
Battery restart — GivEnergy AIO (All-in-One)
On the AIO, the battery is integrated inside the combined unit. The shutdown button is the large blue GivEnergy button on the front; the startup button is the smaller button to the right of the DC cover.
AIO battery restart steps
The large blue button is on the front face of the AIO unit. Press and hold for approximately 5 seconds until you hear audible clicks and the unit goes quiet. The front indicator light will go out. The AIO is now in standby.
Allow at least 30 seconds — 60 seconds is preferable for a complete BMS reset. The AIO may make occasional quiet sounds as internal relays settle; this is normal.
The startup button is the small button to the right of the DC cover (not the large blue button). Press and hold until the front indicator light appears. The AIO will begin its startup sequence — do not press any buttons during this process.
The AIO takes longer than a standalone battery to complete its startup — the inverter and BMS initialise together. Allow up to 5 minutes before checking MyGivEnergy. The portal will show offline during startup; this is expected and resolves automatically.
Battery won't turn back on — what to check
If the battery doesn't respond to the on/off button or doesn't come back on after restart, work through these checks before calling GivEnergy support.
Open the battery flap and check the position of the DC MCB breaker. If it has tripped to the DOWN position during the restart attempt, push it firmly back UP. A tripped MCB prevents the battery from starting — this is the most common reason a battery appears unresponsive after a restart attempt. Close the flap and retry the startup button.
If the AC isolator on the wall has been switched off (circle symbol = off), the battery cannot power on as it has no AC reference from the inverter. Confirm the AC isolator is in the line (ON) position — pointing straight up. On AIO systems, also check the AIO isolator on the unit itself.
Some older GivEnergy Gen 2 installations have a separate DC breaker mounted on the wall rather than inside the battery flap. If you have one of these, check it is in the ON position. It looks similar to an AC isolator and is usually located near the battery unit.
The CAN cable is a small connector (usually RJ45 or a proprietary plug) that runs between the inverter and the battery. If this has come loose — which can happen during property moves or when working near the units — the battery may start but immediately report a communication fault. Check both ends of the cable are firmly seated.
If the battery still does not power on after checking all of the above, the issue is likely a hardware fault — failed BMS board, tripped internal protection, or a battery cell fault. This requires a remote diagnostic or an engineer visit. Do not attempt to open the battery enclosure — this voids the warranty and is unsafe.
What to check after the battery restarts
Frequently asked questions
Press and hold the on/off button on the battery unit until you hear a beep and the LEDs go out (3–5 seconds). Wait 30 seconds, then press and hold again until the LEDs come back on. On an AIO, use the blue GivEnergy button to shut down, wait 30–60 seconds, then press the small button to the right of the DC cover to restart. Allow 2–5 minutes for the battery to reconnect with the inverter.
No. Charge schedules, system mode, discharge cut-off, and all other settings are stored in the inverter's non-volatile memory — not the battery. Restarting the battery does not affect these settings. After restart, the battery reconnects to the inverter and resumes using the existing configuration.
Check the battery DC MCB inside the battery flap — it may have tripped to the down (off) position. Push it back up and retry. Also confirm the AC isolator is in the ON (line) position. On older Gen 2 systems, check for a separate wall-mounted DC breaker. If all isolators are on and the battery still won't respond, it likely has a hardware fault requiring a diagnostic or engineer visit.
The battery itself restarts in under 2 minutes. Allow 5–10 minutes for the battery to re-establish communication with the inverter and for MyGivEnergy to update with current status. During this period the portal may show the system offline or the battery SoC may display incorrectly — this is normal and resolves as the BMS re-synchronises with the inverter.
Related GivEnergy guides
Complete shutdown and restart sequence for GivEnergy Hybrid and AIO systems — the correct order matters.
What causes CAN faults, how a battery restart clears them, and when the cable needs replacing.
What the flashing red LED means and whether a battery restart will clear it.
How to reset the battery SoC calibration if the percentage reading is consistently inaccurate.
If the battery restarts fine but still won't charge overnight, the issue is the charge schedule not the hardware.
Full reference for all GivEnergy F-codes and E-codes — look up any code still showing after restart.