MPPT Solar Charge Controller — HS Code

Classification Notes

MPPT (Maximum Power Point Tracking) and PWM (Pulse Width Modulation) solar charge controllers regulate voltage and current from solar panels to charge a battery bank. Both types are classified under 8504.40 as static converters. The MPPT algorithm is an electronic control function that doesn't shift the classification. Combined MPPT charge controller + inverter units in a single enclosure are 8504.40. Smart charge controllers with Bluetooth monitoring app connectivity are still 8504.40 — the communication function is ancillary. Solar charge controllers are distinct from battery chargers for consumer devices (8504.40 as well, but different subheading). Importers should note that some charge controllers are classified under 8537 (control panels) — verify against BTI rulings for the specific product configuration.