LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms)
LVTopsun Chg Ov_T error code
Cell or module temperature exceeded the BMS charge over-temperature limit.
Likely causes
- High ambient temperature around the battery
- Blocked ventilation or battery installed in a closed cabinet
- Charge current too high for the installation
- Temperature sensor fault
Checks to run, in order
- 1Read the Temp Info page and note which sensor is high
- 2Check ambient temperature and clearance around the battery
- 3Check the charge current against the datasheet
- 4Confirm ventilation fans or cabinet vents are clear
Fixes
- Stop charging and let the pack cool below the limit
- Improve ventilation or relocate the battery out of direct sun
- Reduce the charge current and restart
When to escalate
If one sensor reads high while the others are normal, ask the distributor to check that temperature 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_T mean?
Cell or module temperature exceeded the BMS charge over-temperature limit.
How do I fix LVTopsun Chg Ov_T?
Stop charging and let the pack cool below the limit Improve ventilation or relocate the battery out of direct sun Reduce the charge current and restart
When should I escalate LVTopsun Chg Ov_T?
If one sensor reads high while the others are normal, ask the distributor to check that temperature sensor.
Can I reset LVTopsun Chg Ov_T myself?
Only after isolating the AC and DC sides and running the checks above. If LVTopsun Chg Ov_T 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_T?
LVTopsun Chg Ov_T 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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