Loan for a used electric car with battery rental: How to secure financing
29.04.2025
3
Minutes
Katrin Straub
Managing Director at nextsure
Have you found an affordable used electric car with battery rental, but your bank is hesitant to grant a loan? This is due to the particular ownership structure, where the most expensive component – the battery – does not belong to you. We show you how, with the right preparation and the right arguments, you can still obtain a fair loan for the car you want.
The topic in brief and concise terms
Financing a used electric car with a leased battery often fails because of the lack of loan security for the bank, since the battery belongs to a third party.
An unsecured instalment loan is often the simpler solution compared with a purpose-specific car loan, albeit with slightly higher interest rates.
A detailed total cost calculation, including the purchase price, loan interest and the total battery rental over the period of ownership, is essential for an informed decision.
The core challenge: shared ownership as a credit risk for banks
A used electric car for 10,000 euros sounds tempting, but the monthly battery lease of 79 euros changes the bank’s calculations. The core problem for lenders is the separate ownership of the vehicle and the battery. The bank can only use the vehicle itself as security for the loan, not the battery pack, which often accounts for up to 50 per cent of the vehicle’s value. If the borrower defaults, it is difficult for the bank to realise an asset that is just a car without a functioning battery. This uncertainty means that many banks reject a secured car loan. From a legal perspective, the question arises whether the battery is an essential component of the car, which under Section 947 of the German Civil Code (BGB) could lead to joint ownership – a complex situation for financiers. This legal grey area further increases the lender’s risk. As a result, the financing request is often more complicated than for vehicles with a battery included in the purchase price.
Comparing financing options: earmarked car loan versus unrestricted instalment loan
When financing your used electric car with battery lease, there are basically two routes open to you. A dedicated car loan often offers lower interest rates, as the vehicle serves as security. The interest rate here can be around five per cent. However, a bank may reject this due to the battery issue. An unsecured instalment loan is the flexible alternative here. Since the bank does not know the purpose of the loan, the check of the vehicle's security is omitted. At six to seven per cent, the interest rates are usually slightly higher, but approval is more likely. Here is an overview of the two options:
Dedicated car loan: Lower interest rate (approx. 17 per cent savings possible), but higher hurdles with battery lease.
Unsecured instalment loan: Higher interest rate, but no transfer of ownership of the vehicle as security required.
Dealer financing: Convenient, but often not the cheapest option in the interest comparison.
Leasing: An alternative to buying, where you only pay for use, but this can be more expensive in the long term.
A car loan with a low interest rate is therefore the goal, but the path to it requires careful consideration. Analysing the total costs is the next logical step.
Analysing total costs: when battery leasing really pays off
The low purchase price is only part of the story. A comprehensive cost calculation over the planned period of ownership is crucial. In addition to the purchase price and loan interest, also take the monthly rental costs for the battery into account. A four-year example illustrates this: an EV with leased battery for 9,000 euros and 80 euros monthly rent costs, including loan interest of 1,300 euros, a total of 14,140 euros. A comparable model with a purchased battery for 13,000 euros and loan interest of 1,900 euros costs a total of 14,900 euros. In this case, the rental model results in savings of 760 euros. The rental costs vary depending on the provider and annual mileage, between 50 and 160 euros. Our expert tip: check the term of the rental agreement carefully, as the instalments may increase afterwards. A clever three-way finance arrangement can also be an option here to manage monthly outgoings. The decision depends heavily on individual use and the contract terms.
Residual value forecast: How the leased battery affects the resale value
The resale value is an important factor in the overall cost assessment. A rental battery can have two sides here. On the one hand, it gives the next buyer peace of mind, as the risk of an expensive battery defect lies with the manufacturer. On the other hand, the ongoing monthly costs deter potential buyers. Studies show that depreciation in electric cars in the first year is around 25 per cent. Models with a rental battery can have a residual value of up to 15 per cent lower than comparable vehicles with a purchased battery. The condition of the battery (State of Health) is crucial, which is why a battery certificate helps when selling. The ADAC, for example, offers a manufacturer-independent check for 99 euros. Good care and a complete service record can minimise depreciation. The development of used-car prices shows that transparent vehicle histories are becoming increasingly important. A clear strategy for loan negotiation is therefore essential.
Negotiating Successfully: Five Tips for Your Conversation with the Bank
Good preparation is the key to success in credit negotiations. With the right arguments, you can allay the bank’s concerns. Show that you fully understand the particular situation of battery leasing and have all costs under control. Our expert tip: emphasise that the monthly rental already covers the risk of battery failure, which is akin to insurance. Here is a checklist for your bank meeting:
Create transparency: Submit all documents, namely the purchase contract for the car and the separate lease agreement for the battery.
Demonstrate solid financial planning: Present a detailed household budget that includes the monthly battery lease as a fixed item.
Highlight the benefits: Argue that the manufacturer takes care of replacing the battery in the event of a defect or significant degradation.
Offer security: A higher down payment of at least 20 per cent can significantly increase the bank’s willingness to lend.
Demonstrate creditworthiness: A flawless SCHUFA report and stable income are the best basis for any loan application.
These five points will significantly improve your negotiating position. But the legal details of the lease agreement also deserve your attention.
Legal aspects and insurance: The fine print in the battery rental agreement
The battery lease agreement is a separate legal document with its own rules that you should be aware of. Check carefully under which conditions the battery is replaced, for example if the capacity falls below 75 per cent. Also clarify liability for damage: who pays in the event of an accident or vandalism? It is important that your motor insurance explicitly includes the leased battery. Many standard comprehensive policies have gaps here that need to be closed by a specialised electric car insurance policy. The cover should also include consequential damage and operating errors when charging. Another point is the transfer of the lease agreement when reselling, which must be actively completed by the buyer. If you run into financial difficulties, refinancing your car loan can be an option to reduce the instalments. Request an individual risk analysis now: have your insurance situation reviewed free of charge and receive specific optimisation recommendations.
More useful links
The Federal Motor Transport Authority provides information and statistics on new vehicle registrations in Germany.
The Federal Environment Agency published an analysis of the environmental impact of motor vehicles.
The ADAC offers a guide to buying used electric cars.
Wikipedia provides a general overview of electric cars.
The Consumer Advice Centre provides information on car finance and loan cancellation.
The Federal Ministry for Economic Affairs and Climate Action provides a dossier on e-mobility.
The German Automobile Trust (DAT) published an article about used electric cars.
The Fraunhofer Institute presents its website on battery research.
FAQ
What documents do I need for the loan application?
You will usually need the last three payslips, your bank statements, a copy of your identity card, the purchase agreement for the vehicle and the separate rental agreement for the battery.
How does the battery rental affect my SCHUFA?
The rental agreement itself is not recorded as a loan in SCHUFA. However, the monthly payment is part of your fixed household expenses, which the bank takes into account when assessing your creditworthiness (credit rating).
Does my insurance cover the rental battery?
Not automatically. Check your comprehensive insurance policy carefully. A specialist electric car insurance policy is recommended, as it often provides more comprehensive protection for the battery, including in the event of user error or damage caused by overvoltage.
What is the advantage of a rental battery?
The main advantage is the lower purchase cost of the electric car. In addition, the manufacturer bears the risk of an expensive fault or significant degradation and replaces the battery if necessary.
What is the disadvantage of a rental battery?
The biggest disadvantage is the ongoing monthly costs, which increase the overall cost over the years. In addition, reselling the vehicle can be more complicated, as the buyer must take over the lease agreement.
Can I buy the battery later?
This is rare and depends on the manufacturer. In some cases, after a few years there is a purchase option, the price of which is based on the battery’s residual value. However, this must be expressly provided for in the lease agreement.
