Turn your BESS into a fixed-income asset.

We lease your battery storage and operate it under a fixed-term contract. You keep ownership of the asset, transfer the commercial risk to us, and receive a predictable monthly rent — fully independent of ancillary-services price swings.

What We Do

We target an annual return of 14%.

We structure the cooperation so that it makes economic sense from day one while remaining sustainable over the long term, even as market conditions, the regulatory framework, or the asset owner's priorities change.

Target return based on projected operating economics. Not guaranteed; actual returns will depend on contract structure and asset performance.

Where does battery leasing make sense?

Battery leasing is relevant where the owner wants fixed cash flow, transfer of risk to a third party and, optionally, the possibility of refinancing the investment. The specific structure may vary depending on the asset profile, grid connection, strategy, and willingness to bear risk.

Independent Owners

We agree on cooperation terms with small companies operating storage assets in the single-digit MW range as well as with large corporations seeking broader diversification through partial leasing.

Fixed Cash Flow

As large numbers of BESS assets are being built, uncertainty is increasing in the ancillary services market. By working with us, you can achieve a fixed return, which is appreciated by banks and financial groups alike.

Risk Transfer

We stand behind the principle of guarantees and take on commercial risk. Our contracts include fixed contractual amounts and transfer risks to us.

How It Works

Steps to a Working Partnership

The process begins with verification of feasibility, continues with drafting the agreement, and ends with live operation under the agreed rules.

1

Financial assessment

We review the battery configuration, grid connection, and operating limits, then propose a rent amount and the corresponding target return profile. The question is whether the lease economics work in reality, not just on paper.

2

Technical review

We need the documents that prove the BESS's real capacity and power — technical datasheets, asset labels, the inspection report, the relevant building-authority decision, and any operational records.

3

Lease agreement

We define the commercial perimeter: operating rights, power and capacity, information rights, and the boundaries of liability. Every agreement is drafted specifically for the individual client — a deliberate expression of our personal approach.

4

Trial operation

We operate the asset under a three-month fixed-term agreement so both sides can verify the cooperation works in practice. Once the trial period concludes, we move into a long-term arrangement on the terms we have agreed.

5

Long-term operation

After the trial we sign a long-term fixed-term agreement or an open-ended agreement and enter stable operation under the agreed contract terms.

Financial assessment
Lease agreement
Long-term operation
Why Walltron

We always tailor the cooperation to each specific situation.

We approach every situation individually so that we can stand up in a changing legal, technical, and commercial environment.

What We Emphasize in the Agreement
01 Fair structuring of contractual penalties (smluvní pokuty), the material change of circumstances clause, and exclusion of liberation by force majeure.
02 Clearly defined termination conditions, material breach, severance, conditions subsequent, and (where relevant) achievement of purpose.
03 Structured documentation, controlled data flows, and protection of both parties' privacy.
04 Transactional terms — rent amount, payment due dates, and how they align with actual BESS use.
Read the full contract framework →
About Us

Energy, law, economics — three pillars that form our foundation.

We have extensive experience in renewable energy and a team that understands this sector. We combine our legal, economic, and technical expertise to be the best possible partner on the market.

We focus on building a cooperation that is economically rational and legally structured for the benefit of both parties. For that reason, we tailor each cooperation individually to the parameters of the specific asset, the expected return, and the level of risk the parties are willing to bear.

For these reasons, we are able to approach each client individually according to their needs, and cooperation with us is professional and efficient.

JUDr. Patrick Joseph Krautman, Founder & CEO of Walltron
JUDr. Patrick Joseph
Krautman
CEO
FAQ

Frequently Asked Questions.

Practical questions that come up at the start of any conversation — what the contract regulates, which regulatory approvals are needed, and how termination works.

Each rent agreement is set individually with the client. The starting point is BESS capacity and power, with grid position, contract length, and intended use cases also factored in. We typically target a structure that is more advantageous for the owner than providing balancing services directly — and we are willing to negotiate either a purely fixed rent or a hybrid model with a fixed floor plus a dynamic component.

Each lease agreement is drafted individually to the needs of the specific client. Many provisions are naturally similar across deals, but in material matters — particularly the payment structure and the conditions of use — the contract is always tailored. This individual approach is a deliberate expression of how we work.

Typically: operating rights to the agreed capacity and power, reserved or prohibited uses, access to operational data and documentation, performance standards, allocation of liability, and grounds for termination of the cooperation.

Yes. We only have the right to use the BESS for the duration of the lease agreement.

An energy storage licence is required. If the BESS owner already holds one, no additional engagement with the ERÚ is needed — we trade under their existing licence.

Usually: an initial review of the asset, an exchange of technical and commercial information, a discussion of the intended use cases, and then negotiation of the key contract terms.

We typically start with a fixed-term agreement of three months to verify the cooperation works for both sides. We then move to a long-term fixed-term agreement or an open-ended agreement. The conditions for notice, severance, material breach, conditions subsequent, and other termination grounds are always tailored in the contract.

Contact

Let's talk about your BESS.

A serious discussion starts with real parameters: asset type, operating limits, intended use, counterparties, and commercial expectations. If the structure is viable, we will turn it into a concrete proposal.

Address Roháčova 1666/94, 130 00 Praha 3 – Žižkov
Business Hours Mon–Fri, 9:00–18:00