LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms)
LVTopsun Chg Bat Ov_V error code
The pack voltage rose above the BMS charge over-voltage limit.
Likely causes
- Charge voltage setting above the battery profile
- Inverter not following the CAN charge limits
- Wrong battery protocol selected
- Pack voltage sensing offset
Checks to run, in order
- 1Measure pack voltage at the battery terminals and compare it with the touchscreen value
- 2Check the inverter charge voltage and the selected CAN protocol
- 3Confirm the inverter shows the battery as communicating
- 4Review the charge voltage after a firmware or settings change
Fixes
- Stop charging and correct the charge voltage to the LVTOPSUN profile
- Reseat the CAN cable and reselect the protocol
- Restart charging and confirm the pack voltage stays below the limit
When to escalate
If the measured terminal voltage is correct but the BMS still reports over-voltage, ask the distributor to check the BMS voltage sensing.
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 Bat Ov_V mean?
The pack voltage rose above the BMS charge over-voltage limit.
How do I fix LVTopsun Chg Bat Ov_V?
Stop charging and correct the charge voltage to the LVTOPSUN profile Reseat the CAN cable and reselect the protocol Restart charging and confirm the pack voltage stays below the limit
When should I escalate LVTopsun Chg Bat Ov_V?
If the measured terminal voltage is correct but the BMS still reports over-voltage, ask the distributor to check the BMS voltage sensing.
Can I reset LVTopsun Chg Bat Ov_V myself?
Only after isolating the AC and DC sides and running the checks above. If LVTopsun Chg Bat 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 Chg Bat Ov_V?
LVTopsun Chg Bat 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 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.
- LVTopsun Chg Diff_VThe voltage difference between the highest and lowest cell exceeded the BMS 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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