OCPP heartbeat

Wanlin - China source manufacturer for OCPP heartbeat. Featured model WL-SC20 (20-Socket Centralized Charging Station): 20 ports, 30kW total on 3-phase; DC 60V/72V/96V/120V group-configurable, CC-CV; QR + RFID + app + centralized operator billing; OCPP 1.6J, group management; Steel, IP54 (indoor) / IP65 (outdoor canopy). Full lineup: single-socket home charg···