Alfen charger into error 302 overcurrent

[Lightmanster]

Hi

Iam not sure if its is a bug so lets start in discussion group.

Setup:
EVCC 207.0
Charger Alfen single pro via EMS bus TCPIP
Car : Tesla Model Y

Since a 2 month I have noticed that Surplus charging leads sometimes to a reset of the charger. After the reset the authorisation with backlog is gone and I need to provide the charging card again to continue charging.

Today it happend again and I have done digging into alfen and evcc log:
Note: Alfen log is utc thats why it is 2 hours difference

Alfen log:

2025-08-06T08:47:55.187Z:INFO:taskMain.c:5983:Socket #1: Active current 9.0->6.0 due to current limit: EMS-socket
2025-08-06T08:47:55.199Z:INFO:taskMain.c:5587:Socket #1: overcurrent detection limited for max. 30 seconds (15.0->10.0)
2025-08-06T08:47:55.371Z:INFO:taskMain.c:6349:Socket #1: DC 10.00% (6A)
2025-08-06T08:47:55.382Z:INFO:taskMaster.c:5837:Socket #1: PWM DC: 10.0% (6A)

So far so good Loadbalanced regulates surplus as expected

2025-08-06T08:49:55.183Z:INFO:taskMain.c:5983:Socket #1: Active current 6.0->10.0 due to current limit: EMS-socket
2025-08-06T08:49:55.542Z:INFO:taskMain.c:6349:Socket #1: DC 16.60% (10A)
2025-08-06T08:49:55.566Z:INFO:taskMaster.c:5837:Socket #1: PWM DC: 16.6% (10A)
2025-08-06T08:49:56.601Z:WARNING:taskMain.c:5687:Socket #1: 112% overcurrent triggered: 6.7 > 6.0
2025-08-06T08:49:57.601Z:WARNING:taskMain.c:5687:Socket #1: >150% overcurrent triggered: 9.7 > 6.0
2025-08-06T08:49:59.593Z:ERROR:taskMain.c:5702:Socket #1: overcurrent detected (10.0A > 6.0A)
2025-08-06T08:49:59.617Z:INFO:taskMaster.c:4303:Socket #1: state main : ERROR_CHARGING
2025-08-06T08:49:59.625Z:INFO:taskMaster.c:4315:Socket #1: state power : POWER_MAIN_OFF_BYPASS_OFF
2025-08-06T08:49:59.636Z:INFO:taskMaster.c:4322:Socket #1: state Mode-3: STATE_F
2025-08-06T08:49:59.644Z:INFO:taskMaster.c:4329:Socket #1: state led : ERROR_CHARGING
2025-08-06T08:49:59.656Z:ERROR:comFaults.c:347:Socket #1: Over current detected allowed 10.0A actual 10.0A [302]
2025-08-06T08:49:59.675Z:COM:ocpp_rpc.c:681:-> [2,"462","StatusNotification",{"connectorId":1,"errorCode":"OverCurrentFailur
2025-08-06T08:49:59.675Z:COM:ocpp_rpc.c:681:e","info":"Over current detected allowed 10.0A actual 10.0A","status":"Faulted",
2025-08-06T08:49:59.675Z:COM:ocpp_rpc.c:681:"vendorErrorCode":"302"}]
2025-08-06T08:54:09.531Z:SECURITY:application.c:715:reset: requested, going down..
2025-08-06T08:54:34.718Z:INFO:taskTCPIP.c:601:Network interface is up

EVCC logs:

Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 charge power: 0W
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 charge currents: [0 0 0]A
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:49:49 charge power: 1420W
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:49:49 charge currents: [6.02 0.281 0.277]A
Aug 06 10:49:49 raspberrypi evcc[13004]: [circuit-main] DEBUG 2025/08/06 10:49:49 power: -566W
Aug 06 10:49:49 raspberrypi evcc[13004]: [circuit-main] DEBUG 2025/08/06 10:49:49 current: 2A
Aug 06 10:49:49 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:49 grid power: -566W
Aug 06 10:49:49 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:49 grid currents: [2 -3 -1]A
Aug 06 10:49:49 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:49 pv 1 power: 3007W
Aug 06 10:49:49 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:49 site power: -966W
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 charge voltages: [0 0 0]V
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 charge total import: 8.882kWh
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 charger status: B
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 pv charge current: 4.2A = 0A + 4.2A (-966W @ 1p)
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 site power -966W <= -400W enable threshold
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 pv enable timer start: 15s
Aug 06 10:49:49 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:49 pv enable in 15s
Aug 06 10:49:49 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:49 solar forecast: accumulated 933.764kWh, produced 1145.924kWh, scale 1.227
Aug 06 10:49:59 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:59 ----
Aug 06 10:49:59 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:59 charge power: 0W
Aug 06 10:49:59 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:49:59 charge currents: [0 0 0]A
Aug 06 10:49:59 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:49:59 charge power: 1427W
Aug 06 10:49:59 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:49:59 charge currents: [6.04 0.282 0.277]A
Aug 06 10:49:59 raspberrypi evcc[13004]: [circuit-main] DEBUG 2025/08/06 10:49:59 power: -656W
Aug 06 10:49:59 raspberrypi evcc[13004]: [circuit-main] DEBUG 2025/08/06 10:49:59 current: 2A
Aug 06 10:49:59 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:59 grid power: -656W
Aug 06 10:49:59 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:59 grid currents: [2 -4 -1]A
Aug 06 10:49:59 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:59 pv 1 power: 3019W
Aug 06 10:49:59 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:49:59 site power: -1056W
Aug 06 10:49:59 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:49:59 charge voltages: [238 238 236]V
Aug 06 10:49:59 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:49:59 detected active phases: 1p
Aug 06 10:50:00 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:00 charge total import: 12161.847kWh
Aug 06 10:50:00 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:00 charger status: C
Aug 06 10:50:00 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:00 vehicle soc: 43%
Aug 06 10:50:00 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:00 vehicle range: 221km
Aug 06 10:50:00 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:00 pv charge current: 10.6A = 6A + 4.59A (-1056W @ 1p)
Aug 06 10:50:00 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:00 set charge current limit: 10A
Aug 06 10:50:00 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:50:00 solar forecast: accumulated 933.775kWh, produced 1145.932kWh, scale 1.227
Aug 06 10:50:09 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:50:09 ----
Aug 06 10:50:09 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:50:09 charge power: 0W
Aug 06 10:50:09 raspberrypi evcc[13004]: [lp-2 ] DEBUG 2025/08/06 10:50:09 charge currents: [0 0 0]A
Aug 06 10:50:09 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:09 charge power: 0W
Aug 06 10:50:09 raspberrypi evcc[13004]: [lp-1 ] DEBUG 2025/08/06 10:50:09 charge currents: [0 0 0]A
Aug 06 10:50:09 raspberrypi evcc[13004]: [circuit-main] DEBUG 2025/08/06 10:50:09 power: -2034W
Aug 06 10:50:09 raspberrypi evcc[13004]: [circuit-main] DEBUG 2025/08/06 10:50:09 current: -1A
Aug 06 10:50:09 raspberrypi evcc[13004]: [site ] DEBUG 2025/08/06 10:50:09 grid power: -2034W

Evcc config is

Interval = 10s # also tried higher 30s or 1 min

chargers:

• type: template
  template: alfen
  id: 1
  host: 192.168.100.140
  port: 502
  modbus: tcpip
  name: alfen
• type: template
  name: Ebike_shelly
  template: shelly
  host: 192.168.121.199
  standbypower: 1

Anyone with tips or advises would be nice.

Problem only occurs with PV loading in NOW state everything is fine

Thanks

[Lightmanster]

@hyperbart I saw a same kind of issue #9845 sometime ago. Did you find a solution ?