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--- ha:evchsrger [22/11/2025 22:17] – andrew
+++ ha:evchsrger [24/11/2025 00:06] (current) – [EVSE based controller] andrew
@@ Line 14: / Line 14: @@
 ===== EVSE based controller =====
+After the above Mainpine unit went faulty, I built a replacement using an EVSE controller module.
 {{:ha:img_20251122_215836.jpg?400 |}}
+Components used (L to R)
+  * 100A double pole disconnector to isolate the unit. This is fed via a 16A industrial connector and 20A MCB in a consumer unit, it would be better to have a 16A MCB in it too, but there wasn't space and the 16A socket should always be fed via an MCB anyway. This whole consumer unit is protected by an RCD.
+  * 20A contactor driven by the evse module, this provides a 240v output but at low current. The double pole contactor isolates the EV unless energised, so until the cable is connected, the cable is unpowered.
+  * EVSE module (The blue bit marked MinMax visible is the AC to DC converter). This is WiFi capable, but I have disabled it because....
+  * Ethernet module connected to the EVSE unit. This is used instead of the WiFi.
+The round object at the top is a current transformer to measure the current the EV draws.
+The LCD module is driven from the EVSE and changes colour depending  on the charging state of the module (Green - connected but charged, red - charging)
 {{:ha:img_20251122_215818.jpg?400 |}}
+----
+===== MQTT info =====
+This is a simple flow from NodeRed to show data which can be extracted from the EVSE module.
+{{:ha:nodered-evse.png?600|}}