LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms)
LVTopsun Danger OV error code
Pack or cell voltage entered the BMS danger over-voltage range.
Likely causes
- Charge voltage far above the battery profile
- Runaway cell that will not stop rising
- Voltage sensing error
- Charging with an incompatible charger
Checks to run, in order
- 1Stop charging immediately and measure pack voltage
- 2Read cell voltages and identify any cell still rising
- 3Check the charger or inverter charge voltage setting
- 4Confirm the correct battery profile and protocol
Fixes
- Keep the pack off charge until the voltage falls back into range
- Correct the charge voltage to the LVTOPSUN profile
- Have any runaway cell module replaced
When to escalate
If a cell keeps rising after charging is stopped, isolate the pack and have the distributor inspect it before further use.
Fix it with the right tools
Check the system around the fault before replacing parts: load, battery bank, PV string and commissioning settings. If you need a second opinion, send the code and your inverter model to our team.
Before you open the inverter
- Isolate both the AC and DC sides, then confirm the display is dead before touching terminals.
- Use insulated tools and one hand where possible. DC arcs do not self-extinguish like AC.
- If you see burnt terminals, swollen cells, leaking electrolyte or a burning smell, stop and escalate instead of resetting the fault.
Questions installers ask
What does LVTopsun Danger OV mean?
Pack or cell voltage entered the BMS danger over-voltage range.
How do I fix LVTopsun Danger OV?
Keep the pack off charge until the voltage falls back into range Correct the charge voltage to the LVTOPSUN profile Have any runaway cell module replaced
When should I escalate LVTopsun Danger OV?
If a cell keeps rising after charging is stopped, isolate the pack and have the distributor inspect it before further use.
Can I reset LVTopsun Danger OV myself?
Only after isolating the AC and DC sides and running the checks above. If LVTopsun Danger OV returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show LVTopsun Danger OV?
LVTopsun Danger OV is documented for LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms). Confirm the code on your own unit's display or manual before ordering parts.
More LVTopsun error codes
- LVTopsun Ahesion FltThe BMS detected a main contactor or relay that has stuck closed (contact adhesion).
- LVTopsun Chg Bat Ov_VThe pack voltage rose above the BMS charge over-voltage limit.
- LVTopsun Chg Bat Ud_VPack voltage stayed below the BMS charge under-voltage limit while the pack was supposed to be charging.
- LVTopsun Chg Cell Ov_VCharging was stopped because a cell reached the BMS charge over-voltage limit.
- LVTopsun Chg Cell Ud_VA cell fell below the BMS charge under-voltage limit while the pack was being charged.
- LVTopsun Chg Diff_TThe temperature difference between BMS sensors exceeded the limit during charge.
Guidance reviewed 17 October 2026 by the Mishka Energy installer team. Error codes vary by brand, model family and firmware; confirm against the manufacturer manual.
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