Which OCPP URL do I enter on a ABL 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 username (the identity) and password (the one the panel shows when you add the charger) are required: Security Profile 2.

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

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 ABL charger (eMH2 and eMH3 (Controller or standalone)) and connect it to another platform

Q: Can a ABL charger be connected to a platform other than the manufacturer's?

Yes. The eMH2 and eMH3 (Controller or standalone), eM4 (Controller and Single) models speak standard OCPP and let you change the server URL. In the charger's web interface, Connectivity → OCPP tab. On eMH2/eMH3: http://<charger-IP>:8300 from the same network. On eM4: abl<serial-number>.local (for example abl10325981.local), over the Controller's internal Wi-Fi (password set in the ABL Configuration App) or over the router's network. Only the Controller (or a standalone unit) carries OCPP: the Extenders hang off it. The eMH1 has no OCPP.

A ABL charger that speaks standard OCPP can be connected to any platform by changing one setting. Here is where that setting lives on eMH2 and eMH3 (Controller or standalone), eM4 (Controller and Single), 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 charger's web interface, Connectivity → OCPP tab. On eMH2/eMH3: http://<charger-IP>:8300 from the same network. On eM4: abl<serial-number>.local (for example abl10325981.local), over the Controller's internal Wi-Fi (password set in the ABL Configuration App) or over the router's network. Only the Controller (or a standalone unit) carries OCPP: the Extenders hang off it. The eMH1 has no OCPP.

Step by step

Bring the firmware up to date from ablmobility.de (Service → Downloads). On eMH3, from 2.4.p1 no certificates need uploading for wss://.
Get the internet connection working first (Connectivity → LAN, WLAN or Mobile network; with a SIM, APN and PIN).
Connectivity → OCPP: OCPP version = 1.6. Central system address (URL) = your brand's base URL (below), without the identity.
Chargebox ID: the identity you register in the panel (on eM4 it ships as ABL_<serial>; fine as it is). Local port: 7890 on eMH3; on eM4 it only matters if the URL started with https (SOAP), which it does not. Local path: empty.
Basic authentication password: the password the panel gave you when you added the charger. Save. If the interface warns about TLS certificates for wss://, under Connectivity → TLS choose TLS 1.3 and, if asked, upload the ISRG Root X1 root certificate (Let's Encrypt).
Before rebooting: clock in UTC, operating mode Online and Free charging off if you want the platform to authorise. Maintenance → System → Hard Reset. It connects on its own at boot.

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 ABL, the serial number is the easiest choice.
Username and password	Required. The username is the charger identity and the password is the one the panel shows when you add the charger (shown once; if lost, generate a new one from the charger's page). Without it the server rejects the connection. This is OCPP Security Profile 2 (Basic Auth over `wss://`); there is no unencrypted or password-less path.
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

A Controller + Extenders group is one OCPP connection with several connectors: in the panel it is one charger with N connectors.
The eMH2/eMH3 web interface is on port 8300; without the port in the browser URL nothing loads.
On eM4, if the Controller is joined to an external Wi-Fi, its internal Wi-Fi switches off: go in through the router's network.
ABL ships preset "backend profiles" (Connectivity → Backend); do not pick one, the manual configuration above takes precedence.

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 OpenEVSEOpenEVSE, EmonEVSE (ESP32 WiFi module)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)myenergizappi v2.1 (built-in Wi-Fi/Ethernet)VestelEVC04 (AC7, AC11, AC22; also Home Smart and other-brand units built on the EVC04)MENNEKESAMTRON Professional / Professional+, AMEDIO Professional / Professional+, AMTRON Charge Control AlpitronicHypercharger HYC50, HYC150, HYC200, HYC300, HYC400 (DC fast charging)Brands that do not open up: Tesla, ChargePoint, Emporia, Pod Point, Ohmewhy, and what to do

How to change the OCPP server URL on a ABL charger