MUSTART Supply Voltage Sag / Load Interaction

Charger randomly stops charging when other large appliances in the home turn on (e.g., AC, oven), without showing an error.

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Possible Causes

Undersized service panel, shared circuit with other loads, long wire run causing voltage drop, marginal main control board tolerance to sags

How to Fix / Troubleshooting

Safety warning: Overloading your home electrical system can be hazardous.

  • Dedicated circuit: Ensure the MUSTART charger is on a dedicated circuit with no other major loads.
  • Stagger loads: Avoid running high‑draw appliances while fast charging if your service capacity is limited.
  • Reduce charger current: Lower the charger’s current setting to reduce impact on the household supply.
  • Electrical assessment: Have an electrician evaluate your service capacity and wiring to determine if upgrades are needed.
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Repair Difficulty

Easy 2/5
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