Connect an Alfen charger to GuestCharge

Configured with Alfen's ACE Service Installer software. Request your Alfen account a week ahead, it takes a few days to come through.

Self-install4 steps~30 minLast verified 9 June 2026

At a glance

Works with
Alfen charge points configured via the ACE Service Installer
Setup type
Self-installYou point the charger at our server address
Time
~30 minutes
Last verified
9 June 2026
OCPP server
wss://ocpp.guestcharge.coFull address format is in the guide below.
Stuck? Email team@guestcharge.co

Alfen chargers are configured with Alfen's own Windows program, the ACE Service Installer. The catch is access: you need an Alfen account to use it, and new accounts can take several working days to be approved. So the one thing to do early, ideally a week before you plan to set up, is request the account.

Before you start, check you have

  • An Alfen account: request one at support.alfen.com via "Sign up for an account". Allow several working days.
  • The ACE Service Installer from alfen.com/downloads, installed and logged in. Update it when prompted on opening; the configuration won't work properly on an old version.
  • The charger already online via Wi-Fi or ethernet, on the same network as your computer
  • About 30 minutes once the account is sorted

1Find the charger's identifier

Open the ACE Service Installer. Your charge point appears on the left side of the screen with an ID in the form ACExxxxxxx. Copy it down exactly.

Worth knowing: this identifier is not always the same as the serial number on the unit's label. The ACE identifier is the one that matters here.

2Add the charger in your GuestCharge dashboard

Run the onboarding wizard with the ACE identifier from step 1.

3Enter the backend settings

Select your charge point in the ACE Service Installer and set:

  • Backoffice preset: Manually enter backend settings
  • Protocol: OCPP 1.6
  • Backend URL: wss://ocpp.guestcharge.co/ followed by the ACE identifier, like wss://ocpp.guestcharge.co/ACE0123456

4If the charger uses a SIM card

Using your own SIM rather than a hardwired or Wi-Fi connection? You'll need to enter the SIM's APN:

  1. Keep the Backoffice preset on Manually enter backend settings
  2. Go to Network Profile 2
  3. Change the priority to 14
  4. Enter the APN name, and the APN username if your SIM provider uses one

Be patient with SIM connections: the first connection to the backend can take up to an hour.

How you know it worked

The charger shows as connected in your GuestCharge dashboard. On Wi-Fi or ethernet this is usually within a couple of minutes; on a SIM, give it that hour before worrying.

If it won't connect

  • Check the backend URL and the ACE identifier character by character, and that the wizard entry matches the ACE identifier, not the label serial, if the two differ
  • Confirm the charger and your computer are genuinely on the same network, or ACE won't even show the unit
  • On SIM connections, double-check the APN details and the Network Profile 2 priority

Still stuck? Email the ACE identifier to team@guestcharge.co and we'll check from our side.

More setup guides

All guides →
A

Connect an ABB Terra AC to GuestCharge

ABB

A

Connect an Autel charger to GuestCharge

Autel

CA

Connect a Charge Amps charger to GuestCharge

Charge Amps

Choosing a charger? Read our guide to the best EV chargers for UK holiday lets.

Still stuck? Email team@guestcharge.co with your charger's serial number.

Or try the generic OCPP guide, or check supported chargers.

Every guide, one library.

Browse all 26 charger setup guides in one place.

Browse all guidesCreate your free account