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How to tell a trustworthy provider of energy direct investments

With a direct investment in an energy asset, you hand a six-figure sum to a provider before a single kilowatt-hour has been sold. This article shows the seven warning signs that point to trouble in practice, and the questions you can use to test any provider, including us.

Jakob HubertJakob HubertPublished 01 June 2026~7 min read

A direct investment in a solar or battery-storage asset is an entrepreneurial investment: you become a co-entrepreneur in a real asset, not the buyer of a standardised financial product. That is why the tax effect is so strong, and also why choosing the provider deserves more care than buying an ETF. There is no issuer fact sheet that regulates everything; much depends on the structure the provider sets up and on what it actually delivers after the purchase.

The good news: trustworthiness can be checked without a degree in tax or energy law. You don't need the jargon. You need the right questions and a sense for when an answer is evasive.

What makes an investment sound

Three qualities separate a robust structure from a risky one. First: traceability. You can account for every euro, from the purchase price through the financing to every fee. Second: substance. Behind the investment stands a real project with a real grid connection, real contracts and a real operator, not just an offering on paper. Third: commitment after the purchase. The provider states before closing what it will do for you afterwards, and puts it in writing.

These three points sound obvious. In practice it is precisely their absence that causes problems, rarely dramatic fraud, far more often creeping opacity: costs that only surface after signing, or a provider who is no longer reachable once the deal is done.

Broker, manager, adviser: Who may do what?

Different roles appear in this market, and legally they mean different things. It pays to keep the terms apart, not out of formalism, but because they determine what duties a counterparty owes you.

  • A broker connects you with the project and structures the investment. They earn on the placement, which is legitimate, but should be disclosed transparently.
  • Investment advice in the regulatory sense (under German securities law) requires a licence and is bound to specific duties. Anyone giving individual recommendations without the relevant licence is on thin ice.
  • Tax advice may only be given by a tax adviser. Statements like “you'll save X euros in tax” are non-binding examples without tax guidance, not advice. And a sound provider will say so.

Seven warning signs

1. The costs are not complete and in writing

If you ask for “all costs” and get an approximate answer, a reference to “market standard” or a “we'll discuss that later”, that is the single most important warning sign. Every fee (placement, ongoing service, any structuring or transaction costs) must be available in full and in writing before you sign. Hidden mark-ups on the purchase price are especially insidious because they don't appear as a fee.

2. Guaranteed returns

“Safe 8% return” does not exist for an entrepreneurial real asset. Power revenues fluctuate, markets change, technology fails. Sound providers show scenarios and sensitivities, and name the total-loss risk. Anyone guaranteeing a fixed figure is selling a story, not an investment. Why a storage return can only be stated responsibly as a range with named assumptions is shown in Battery storage returns: where the revenue comes from, and what is realistic.

3. Time pressure and artificial scarcity

“Only two tickets left”, “the tax window closes tomorrow”, “the price goes up next week”: urgency is a classic sales tool. A sound investment decision needs time for review, follow-up questions and involving your tax adviser. Anyone who won't grant that time has an interest in you not looking closely. What a clean process without pushiness looks like (review first, then subscribe) is shown in From first enquiry to closing: how a direct investment works step by step.

4. No access to the real contracts

Before signing you should see the actual documents: partnership agreement, purchase or transfer agreement, financing and direct-marketing contracts. A nice presentation is no substitute for contracts. “You'll get the details after signing” is the wrong order. Those contracts also determine how insolvency-resilient the project is structured, meaning who owns the plant and who holds the site rights; what to look for is shown in Provider or operator insolvency: what happens to your direct investment.

5. No binding support after the purchase

Ask specifically: who produces my reporting? Who monitors the asset technically? Who supplies the documents for my tax return, year after year? If the answer stays vague or the conversation steers conspicuously towards closing, that points to a pure transaction business: sell and move on.

6. The tax benefit as the sole selling point

The tax effect (for example via the investment deduction under §7g EStG) is real and powerful, but it is the consequence of an economically sound investment, not its purpose. Anyone selling the project almost entirely on the tax saving while only brushing over the operating substance (location, grid connection, revenue model, operator) has the priorities reversed. An investment that only works because of the tax does not work.

7. Unclear origin of the project

Who developed the project? Who operates it? Who is the direct marketer? A sound provider names the parties and can explain the chain from developer to grid connection. If the origin stays in the fog, there is no basis to judge substance and risk at all. How to check site security, building rights and grid connection yourself from the documents is shown in Grid connection, easement, building rights: how to tell whether a direct investment has truly secured its site.

Questions to ask any provider

These six questions cost nothing, need no expertise and expose most weak spots. Ask them, of us too. A seventh belongs on the list as soon as tax advantages are part of the pitch: ask for the economics without the tax effect. Why exactly that decides tax recognition is explained in Liebhaberei and profit intention: when the tax office cancels the tax lever.

  1. Before I sign, do I get a complete, written breakdown of all costs, one-off and ongoing?
  2. May I see the real contracts in advance, including the partnership, financing and direct-marketing agreements and the insurance policies?
  3. Who handles reporting, technical monitoring and the tax documents after closing, and is that in writing?
  4. What do the revenues look like in a bad scenario, and how large is my maximum loss?
  5. In what role do you act (broker, adviser, manager) and do you work with my tax adviser?
  6. Who developed the project, who operates it, and can I speak with the operator?

Sound vs. warning sign

TopicSoundWarning sign
CostsComplete, in writing, before signingApproximate, “market standard”, later
ReturnsScenarios + total-loss risk namedFixed figure guaranteed
PaceTime for review and tax adviserArtificial scarcity, time pressure
ContractsReal documents viewable in advancePresentation only, details “later”
After the purchaseSupport committed in writingStays vague, focus on closing
ProjectDeveloper, operator, marketer namedOrigin unclear
The recurring patterns: on the left what you may expect, on the right what should make you look closer.

How we handle this

We disclose all costs in writing before signing, make the actual contracts available for review, and work explicitly with your tax adviser. And if you don't have a tax adviser familiar with energy direct investments, we can bring in our own reputable tax and legal advisers who know exactly this field, and put you in touch, so you can have the structure reviewed independently. For us the tax effect is a result of the structure, not the sales pitch. And we remain your point of contact after closing: reporting, technical monitoring and the annual tax documents are part of the support, not an add-on.

The most honest way to test this is in conversation. Ask us the six questions above, and compare the answers with others'. A non-binding first call costs you nothing but half an hour.


Frequently asked questions

How do you recognise a trustworthy provider of energy direct investments?

You recognise a trustworthy provider by three things: every cost is fixed in writing before you sign, you get to review the real contracts (not just a summary), and the provider describes concretely and bindingly what it does for you after closing. If a provider dodges on any of these points, that is a warning sign, no matter how convincing the return story sounds.

What are the most important warning signs in an investment offer?

Seven warning signs point to trouble in practice: incomplete or unwritten cost figures, guaranteed returns, time pressure and artificial scarcity, no access to the real contracts, vague statements about post-purchase support, the tax benefit as the sole selling point, and an unclear origin of the project. Even one of these patterns is reason to look closer.

Are guaranteed returns legitimate for direct investments?

No, guaranteed returns do not exist for an entrepreneurial real asset: power revenues fluctuate, markets change, technology can fail. Sound providers show scenarios and sensitivities and name the total-loss risk. Anyone guaranteeing a fixed figure is selling a story, not an investment.

Which questions should I ask any provider before investing?

Six questions expose most weak spots: ask for a complete written breakdown of all costs, for access to the real contracts before signing, for the post-closing support agreed in writing, for the revenues in a bad scenario and your maximum loss, for the provider's role and its cooperation with your tax adviser, and for the developer and operator of the project. As soon as tax advantages are part of the pitch, a seventh belongs on the list: the economics without the tax effect.

Is a heavily advertised tax benefit a warning sign?

Not the tax benefit itself, but its role in the sales conversation: the tax effect is the consequence of an economically sound investment, not its purpose. Anyone selling a project almost entirely on the tax saving while only brushing over location, grid connection, revenue model and operator has the priorities reversed. An investment that only works because of the tax does not work.

May any provider advise me on a direct investment?

No, the roles are legally separate: a broker connects you with the project and earns on the placement, investment advice in the regulatory sense (under German securities law) requires a licence, and tax advice may only be given by a tax adviser. Statements about concrete tax savings are non-binding examples without tax guidance, not advice. What matters is that the provider makes transparent in which role it acts and where the limits of its statements lie.

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