LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms)
LVTopsun Chg Ov_C error code
Charge current exceeded the BMS limit.
Likely causes
- Charge current limit set too high in the inverter
- Too many charge sources running at once (PV, grid, generator)
- BMS current sensing error
- Undersized DC cabling causing abnormal current sharing
Checks to run, in order
- 1Compare the inverter charge current with the battery datasheet limit
- 2Check the total of all charge sources
- 3Measure DC current with a clamp meter and compare with the display
- 4Check DC cable size and terminations
Fixes
- Reduce the charge current limit to the datasheet value
- Stagger or limit the charge sources
- Retorque the DC terminations
When to escalate
If the measured current is within the limit but the BMS still trips, ask the distributor to check the BMS current sensor.
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 Chg Ov_C mean?
Charge current exceeded the BMS limit.
How do I fix LVTopsun Chg Ov_C?
Reduce the charge current limit to the datasheet value Stagger or limit the charge sources Retorque the DC terminations
When should I escalate LVTopsun Chg Ov_C?
If the measured current is within the limit but the BMS still trips, ask the distributor to check the BMS current sensor.
Can I reset LVTopsun Chg Ov_C myself?
Only after isolating the AC and DC sides and running the checks above. If LVTopsun Chg Ov_C returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show LVTopsun Chg Ov_C?
LVTopsun Chg Ov_C 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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