Use this path when the battery is deeply discharged and the charger is not completing the wake-up or activation sequence.
Run these quick checks before you assume the charger has a deeper hardware fault.
AC socket is energised. Test it with another appliance.
AC plug is fully inserted, undamaged, and its pins are clean and straight.
DC output connector is fully locked into the vehicle inlet, not just inserted.
Both AC and DC cables are free of cuts, kinks, crushing damage, or severe bending.
Charger vents are unobstructed and have at least 10 cm clearance on all sides.
Ambient temperature is below 45 C.
No extension cord is being used, or the cord is correctly rated and within the allowed length.
Universal reset has been tried: AC off for 30 seconds, then reconnect.
Follow the steps in order. Stop and escalate as soon as a step says the issue is not field-serviceable.
Activation Mode has no reverse-polarity protection and no short-circuit protection. Confirm Red or Brown = Positive (+) and Blue or Black = Negative (-) every time.
Seat the DC connector in the vehicle inlet before energising AC. Never power an open DC connector during activation.
The charger needs the full 5-second listen window plus up to 10 seconds of activation to complete the wake-up attempt.
Activation succeeded. Leave the charger connected and let the battery complete a full charge cycle.
If charging has not started, disconnect AC for 30 seconds and retry. Stop after 3 correct attempts.
If the pack is below about 1 V per cell, or activation still fails after 3 correct attempts, the battery may be beyond recovery or the BMS may be damaged.
Keep moving between the support guides below to narrow the issue faster.
See how Solterra chargers wake deeply discharged batteries and what risks apply during activation.
Pick a symptom and follow the correct field checks before escalating to service.
Review Solterra LED fault codes, match blink patterns, and use the interactive simulator and reference table.
