Can a Delta AC MAX be connected to another OCPP platform?

Yes. The AC MAX Smart speaks OCPP 1.6J and the server URL is changed in its web tool, Configuration tab, Supervision URL field. You get in from the charger's own Wi-Fi (192.168.5.1) or over Ethernet (192.168.123.123).

Which OCPP URL do I enter on a Delta AC MAX for askacharge.com?

wss://askacharge.com/askacharge/ocpp/your-brand in Supervision URL, where your-brand is your brand identifier on askacharge.com. Charge Box ID is the serial number, the same one you register in the panel. askacharge.com requires a password; if your firmware has no field for it, write to us.

Why can't I open my Delta AC MAX configuration?

Two usual reasons: you are on your home Wi-Fi (it only opens from the charger's own Wi-Fi or over a cable), or the charger is already connected to an OCPP platform, and then the web tool closes until it is removed from the platform or rebooted without internet.

How to change the OCPP server URL on a Delta charger (AC MAX Smart) and connect it to another platform

A Delta charger that speaks standard OCPP can be connected to any platform by changing one setting. Here is where that setting lives on AC MAX Smart, 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 configuration tool, Configuration tab → Operating with OCPP Central System. It opens from a laptop connected to the charger's own Wi-Fi hotspot (http://192.168.5.1) or over an Ethernet cable (http://192.168.123.123), with username admin and the password printed on the documents that come with the unit. It does not open from your home Wi-Fi.

Step by step

Update the firmware first. Integrators have tested 01.25.12.00 and 01.26.37.00, and advise against 01.26.34.00.
Add the charger on askacharge.com with the serial number as its identity and keep the password the panel shows you.
Connect the laptop to the charger's Wi-Fi: the network is named after the serial number (for example JV99999999999WE) and its key is printed with the unit. A direct Ethernet cable also works.
Open http://192.168.5.1 (Wi-Fi) or http://192.168.123.123 (Ethernet) and log in as admin.
Configuration tab → tick Operating with OCPP Central System. In Supervision URL, your brand's URL (below), without the identity at the end. OCPP Version: OCPP1.6J. Charge Box ID: the serial number.
If your firmware has them: Online Policy set to Authorization (RFID), so the platform decides who charges, and Cold Load Pickup set to Disable. Set Max Charging Current (A) to what your electrician says.
Under Communication, leave the charger with internet (home Wi-Fi, Ethernet or 4G SIM). Save: the charger reboots and shows as connected in the panel.

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 Delta, 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://`). If your model only supports unencrypted `ws://`, it can be allowed charger by charger on its page in the panel, and the password is still required.
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.

Want to check it before signing up for anything?

Point your charger at our OCPP test server: free, no account, over wss:// or ws://. You will see what it sends live and we will tell you what would fail when you connect it for real.

Where it usually fails

The web tool does not open from your home Wi-Fi, even if the charger is connected to it: only from its own hotspot or over a cable.
Once connected to an OCPP platform, the web tool is no longer reachable. To get back in you have to remove it from the platform or reboot it without internet.
Do not set Online Policy to Plug and Charge: the charger starts by itself on plug-in and the platform cannot stop it.
No published integrator guide shows OCPP username and password fields on the AC MAX. askacharge.com requires a password: if your firmware has no such fields, write to info@askacharge.com before going further and we will sort it out with you.
If the platform reports errors with the energy readings, update to 01.26.37.00 or later and do a factory reset: that is how evcc users solved it.
Delta fast chargers (SLIM DC) use a different web page and fields (Cs Address, chargeBoxIdentity, user service); this guide is for the AC MAX.

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 ABLeMH2 and eMH3 (Controller or standalone), eM4 (Controller and Single)AlpitronicHypercharger HYC50, HYC150, HYC200, HYC300, HYC400 (DC fast charging)CircutorURBAN T22, URBAN T22-C2, URBAN WB FroniusWattpilot Go, Wattpilot Home, Wattpilot Flex HuaweiFusionCharge AC (SCharger-7KS-S0, SCharger-22KT-S0)GAROGLB+, GTB+, Twin+, LS4, Entity Pro SMAEV Charger Business Brands that do not open up: Tesla, ChargePoint, Emporia, Pod Point, Ohme, JuiceBox (Enel X), Enphase, FLO, Blinkwhy, and what to do

How to change the OCPP server URL on a Delta charger

Where the setting lives

Step by step

What to enter to connect it to askacharge.com

Want to check it before signing up for anything?

Where it usually fails

If your brand isn't here

Other brands

Related reading

Sources

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I'm at the charger

My charger has been down for a while

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