Using an existing home charger for a company car: check compatibility and supporting records

An existing home charger can continue to be used for a company car if its specific metering setup, vehicle allocation and data access fit your company's reimbursement process. Successful charging or the word “MID” on a data sheet is not enough to make that decision. First check how the charger is actually used and review a complete sample record. Only then can you justify whether continued operation, an upgrade or replacement makes sense.

This review process applies to companies with employees in Germany. It combines an assessment of the existing equipment with approval by fleet management and the team handling reimbursements. The linked requirements reflect the legal position as of 24 September 2026.

Start with an equipment file for each charging location

First ask the employee for the manufacturer, exact model name, serial number, installation year and available documents. A photo of the front of the charger helps, but does not replace a data sheet. Devices in the same product family may have different meters, communication capabilities or permitted uses.

Also record the current operator and owner. The charger may belong to the employee, the landlord or a community of owners. An existing service provider may manage it. This arrangement determines who may commission changes and release data. Having personal access to the app does not in itself give someone the right to transfer the charger to another service provider.

An organised list of documents is enough for the initial review:

• Model and configuration, including the meter designation and firmware version

• Installation and commissioning documents, and any available evidence of conformity

• Authorised users, connected vehicles and other loads on the metered circuit

• A sample monthly report and, where relevant, a record of an individual charging session

• Existing operator agreement, export options and available administrator rights

• Household electricity contract and proposed reimbursement method

Collect only information needed for the decision. A complete profile of private household consumption is not a necessary part of every preliminary technical review.

Check metering and reimbursement separately from the charging function

The fact that the vehicle receives electricity does not establish which reading can later support a payment. For example, the meter might measure the entire charger, even though a second, privately owned vehicle also charges there. Or the app may display consumption without making the necessary supporting records available over the long term.

The AGME technical guidance on employer reimbursement distinguishes a simple stationary setup with a precisely defined use from more complex billing arrangements. An MID meter is therefore not blanket approval for every use. Have the proposed application confirmed on the basis of the device documentation.

In particular, the simplified approach requires a permanently grid-connected meter that measures only the energy for the electric vehicle, with no additional connected loads. The energy must be obtained from just one contracting party; the meter must have undergone conformity assessment or hold valid verification and must be used correctly. AGME explicitly states that using an ordinary MID meter as a mobile device in a charging cable is not permitted.

Keep three questions separate during the review: Is the energy measured appropriately? Can it be allocated to the correct vehicle? Can the reimbursement team use the corresponding record in a traceable way? A satisfactory result requires a reliable answer to each question.

Our article Charging a company car at home: reimbursing electricity costs correctly in 2026explains the tax basics. The tax-related records discussed there do not replace an assessment of the specific meter and its use.

Check the data flow all the way to payroll

Request a genuine sample export using non-sensitive or anonymised data. Review it with the team that will later approve reimbursements. The problem often lies between the device report and the monthly reimbursement process rather than in charging itself: the reporting period may be missing, vehicle names may be editable or the meter identifier may not be visible.

The connection to the management system should therefore be confirmed using a specific workflow. Can the employee generate the required report themselves? Does a service provider have to supply it? Will the data remain accessible after the contract ends? Are previously stored sessions delivered in full after a connection interruption? Each answer should apply to the actual device configuration.

For automatic transmission, a general reference to a communication protocol is not proof of compatibility. Obtain confirmation of which data, functions and versions have been tested between this exact charger and the intended system. A protocol may be available while individual required functions are implemented differently or access is restricted by contract.

Use an approval matrix with clear consequences

Use “unresolved” as a separate status. A missing document means neither that the review has passed nor that new hardware is automatically required. This prevents replacement purchases before the existing equipment has been assessed objectively.

Assign a responsible person and the required evidence to each unresolved point. If, for example, the device configuration is missing, the installer may be able to help; if export authorisation is missing, the existing operator may be the right contact. This ensures that technical and contractual queries are addressed to the appropriate people.

Compare continued operation, upgrades and replacement

Continuing to use the charger without changes may involve lower one-off costs. However, a manual export can add work each month. Include that working time over the planned period of use. An inexpensive device offers little economic benefit if every reimbursement cycle generates several follow-up queries.

An upgrade may make sense when it resolves a clearly defined shortcoming, such as an unsuitable metered circuit or missing data access. Before commissioning the work, obtain confirmation of whether it affects the documented conformity, existing warranty conditions or other device functions. Qualified professionals should carry out the technical work.

Replacement is worth considering if several requirements are not met or the existing management arrangement does not fit the fleet process over the long term. Include removal, installation, new contracts and the preservation of old records in the comparison. The purchase price alone does not capture the cost of the transition.

Decide only after a full trial month

Plan at least one reimbursement cycle that includes typical exceptions: charging across a month-end, an interrupted data connection or a change in vehicle allocation. Choose only scenarios that form part of future use. You need a verifiable path from the charging session to the approved amount, rather than an artificial stress test.

Document the result as a specific approval covering the device, metering arrangement, user group, data flow and tariff method. If one of these features later changes, for example because another privately owned vehicle is added, reopen the relevant part of the review. This allows existing equipment to remain useful without assuming its suitability indefinitely.

For your next decision, you can consider the StromNow offering for charging company cars at home . It includes home charging, recording and prepared reimbursement records. Discuss your existing home chargers with StromNow and bring a model list, user arrangements and a sample export. This allows the specific connection to your fleet process to be assessed.