LVTS-5220-HVX high-voltage battery - BMS alarm page on the battery touchscreen (LVTOPSUN BMS protection alarms)
LVTopsun SOC Low error code
State of charge fell below the BMS low-SOC warning threshold.
Likely causes
- Loads larger than the PV or grid charging can support
- Inverter discharge depth set below the recommended reserve
- Battery not recharging because of a CAN or charge fault
- Capacity reduced by ageing
Checks to run, in order
- 1Read SOC and remaining capacity on the battery touchscreen
- 2Check the inverter discharge depth and low-SOC cut-off settings
- 3Confirm the battery is charging when PV or grid is available
- 4Check for an active charge or communication alarm
Fixes
- Reduce load or add charging capacity
- Raise the low-SOC cut-off to the recommended reserve
- Restore charging and allow a full recharge
When to escalate
If SOC falls quickly under a light load, ask the distributor to run a capacity test on the pack.
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 SOC Low mean?
State of charge fell below the BMS low-SOC warning threshold.
How do I fix LVTopsun SOC Low?
Reduce load or add charging capacity Raise the low-SOC cut-off to the recommended reserve Restore charging and allow a full recharge
When should I escalate LVTopsun SOC Low?
If SOC falls quickly under a light load, ask the distributor to run a capacity test on the pack.
Can I reset LVTopsun SOC Low myself?
Only after isolating the AC and DC sides and running the checks above. If LVTopsun SOC Low returns immediately, stop resetting it and escalate; a repeating fault usually points to a real circuit, battery or hardware problem.
Which models show LVTopsun SOC Low?
LVTopsun SOC Low 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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