LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms)
LVTopsun Dsg Cell Ov_V error code
A cell rose above the BMS discharge over-voltage limit while the pack was discharging.
Likely causes
- Cell imbalance with a high cell
- Regenerative or charger current reaching the pack while it is in discharge
- Cell-voltage sense error
- Pack switched from charge to discharge with a high cell
Checks to run, in order
- 1Read all cell voltages on the touchscreen
- 2Check whether a charge source is active while the inverter is discharging
- 3Compare the high cell with the pack average
- 4Confirm the inverter is not back-feeding the battery
Fixes
- Stop discharge and let the BMS balance the pack
- Remove or limit the charge source during discharge
- Recheck the cell spread after balancing
When to escalate
If the high cell persists after balancing, ask the distributor to test that module.
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 Dsg Cell Ov_V mean?
A cell rose above the BMS discharge over-voltage limit while the pack was discharging.
How do I fix LVTopsun Dsg Cell Ov_V?
Stop discharge and let the BMS balance the pack Remove or limit the charge source during discharge Recheck the cell spread after balancing
When should I escalate LVTopsun Dsg Cell Ov_V?
If the high cell persists after balancing, ask the distributor to test that module.
Can I reset LVTopsun Dsg Cell Ov_V myself?
Only after isolating the AC and DC sides and running the checks above. If LVTopsun Dsg Cell Ov_V returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show LVTopsun Dsg Cell Ov_V?
LVTopsun Dsg Cell Ov_V 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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