Can a OpenEVSE charger be connected to a platform other than the manufacturer's?

Yes. The OpenEVSE, EmonEVSE (ESP32 WiFi module) models speak standard OCPP and let you change the server URL. In the WiFi module's web interface (http://openevse.local or its IP): Settings → OCPP.

Which OCPP URL do I enter on a OpenEVSE for askacharge.com?

wss://askacharge.com/askacharge/ocpp/your-brand, where your-brand is the brand identifier on askacharge.com; the charger appends its identity. The identity must match the one registered in the panel and the password stays blank unless the charger's OCPP credential has been enabled.

Do I lose the manufacturer's app when I set OCPP on a OpenEVSE?

Some app functions move to the OCPP platform (start, cards, statistics). The hardware stays the same and you can go back by changing the URL again.

How to change the OCPP server URL on a OpenEVSE charger (OpenEVSE) and connect it to another platform

A OpenEVSE charger that speaks standard OCPP can be connected to any platform by changing one setting. Here is where that setting lives on OpenEVSE, EmonEVSE (ESP32 WiFi module), exactly what to enter, and where people usually get stuck. Written by a platform (askacharge.com), but the procedure works for any.

Where the setting lives

In the WiFi module's web interface (http://openevse.local or its IP): Settings → OCPP.

Step by step

Update the WiFi module firmware from Settings → Firmware update; old versions do not have the OCPP page.
Settings → OCPP: in Server your brand's base URL (below); in Charge box ID the identifier you register (you choose it here: there is no fixed serial number).
Authorization key blank, unless you enable the charger credential in the panel.
If you want it to charge without a card, set a Default ID tag and enable automatic authorisation. Save; it connects in seconds and sessions appear under History.

What to enter to connect it to askacharge.com

OCPP server URL	`wss://askacharge.com/askacharge/ocpp/your-brand` — your-brand is your brand's identifier on askacharge.com (shown under Chargers → Add, with the full URL ready to copy). The charger appends its own identity; if your unit only has a URL field and no identity field, enter the full URL: `…/ocpp/your-brand/identity`.
Charge point identity	The same one you register in the panel when adding the charger. Case-sensitive. With OpenEVSE, the serial number is the easiest choice.
Password	Blank by default. If you enable the charger's OCPP credential in the panel (recommended for units exposed to the internet), the username is the identity and the password is the one the panel generates: OCPP Security Profile 2.
Protocol	OCPP 1.6J (JSON) or OCPP 2.0.1. Subprotocol `ocpp1.6` / `ocpp2.0.1`.
Before connecting	The charger must be registered in the brand with that identity; otherwise the server rejects the connection. Register under Chargers → Add.

Where it usually fails

The identifier is case-sensitive and must be unique within your brand: with several OpenEVSE units, do not leave the default on all of them.
When a CSMS is connected its commands take priority over local schedules and RFID, but not over the unit's own safety limits.
With Suspend EVSE enabled the charger gives no current until the platform authorises; untick it if that is not what you want.

If your brand isn't here

The procedure is always the same; what changes is where the setting lives: look in the manufacturer's app, in the charger's web interface (by its IP) or in the installer software for a section called OCPP, Back office, Central System or Server. You need to be able to enter the URL and, nearly always, the identity. If the field is locked or missing, the manufacturer has tied the charger to its own platform: read what to do when the manufacturer locks or switches off its server.

Other brands

WallboxPulsar Plus, Pulsar Max, Pulsar Pro, Commander 2, Copper SB AlfenEve Single S-line, Eve Single Pro-line, Eve Double Pro-line, Twin AutelMaxiCharger AC Lite, AC Wallbox, AC Elite, AC Ultra Grizzl-EGrizzl-E Smart, Grizzl-E Smart v2 (North America)V2CTrydan, Trydan Pro CircontroleNext Elite, eNext Park, Raption, Wallbox eHome (with communications module)ZaptecGo, Go 2, Pro EaseeHome, Charge, Charge Core, Charge Lite, One KEBAKeContact P30 x-series (and c-series as clients), P40 ABBTerra AC (W7, W11, W22)Schneider ElectricEVlink Pro AC, EVlink Smart Wallbox, EVlink Parking TeltonikaTeltoCharge (all variants)IngeteamINGEREV Fusion Wallbox, Fusion Street, Rapid OrbisViaris Uni, Viaris Combi+, Viaris City WebastoUnite, Unite MID, Next, Pure SiemensVersiCharge 48A, VersiCharge Blue 80A, VersiCharge IEC go-eCharger Gemini, Gemini flex, Gemini 2.0, Pro, HOMEfix/HOME+ (V3)EtrelINCH Home, INCH Pro, INCH Duo EVBoxElvi, BusinessLine Gen4 (Everon closed 1 Dec 2025)

Sources

OpenEVSE — OCPP user guide (GitHub)

How to change the OCPP server URL on a OpenEVSE charger