Insuring a solar park or battery storage asset: which policies belong to a direct investment, and who holds them

The question comes up in almost every first conversation, usually late and almost in passing: what actually happens if the park burns down? It is a fair question, and the answer is shorter than most people expect. Damage to the hardware is the smaller problem, because it is insurable and is insured as a matter of course in properly prepared projects. The interesting questions sit next to it. Who brings the claim, if the asset belongs to your business rather than to you personally? What replaces the lost revenue, when that revenue depends on market prices? And why can the insurer's payment of all things trigger a tax bill?

Why is insurance a matter for the business rather than for you privately?

Because the asset does not legally belong to the land it stands on. A solar park is built on leased ground, and §95 Abs. 1 BGB expressly excludes from the constituent parts of a property both things attached to the land for a temporary purpose and structures erected in the exercise of a right over someone else's land. Modules, inverters, the transformer station and storage containers therefore remain separate, movable fixed assets. Two things follow. First, no building or property policy held by the landowner covers this installation; it needs its own. Second, that policy sits with the business, and with a direct investment the business is yours: it is the same commercial operation that opened up the §7g lever for you (the underlying mechanics are explained in The Investitionsabzugsbetrag explained simply: how the IAB works) and on whose books the hardware sits. In practice the contracts are placed and administered by the technical and commercial operations management, which also handles maintenance, settlement and reporting (What happens after closing: reporting, asset management and why a partner is not a broker). The premium is a running business expense and belongs visibly in the financial model you are shown (Transparent costs: which fees a direct investment involves, and which ones are hidden).

Which policies belong to a solar park or storage asset?

Four, and they cover very different things. The first two protect your assets, the other two protect you against third-party claims. They are often sold as a package, but legally they are separate contracts with their own sums insured, deductibles and exclusions; which is exactly why each set of terms is worth reading.

One point that sales material occasionally overstates: the strict, no-fault operator liability of the Umwelthaftungsgesetz generally does not apply here. §1 UmweltHG only catches installations listed in Anhang 1 of that act, and the list is exhaustive; it names neither photovoltaic nor electricity storage installations, and power plants only insofar as they run combustion plants for solid, liquid or gaseous fuels. For our assets it therefore comes down to fault-based liability under §823 BGB and the public-law remediation duty of the Umweltschadensgesetz. That does not make environmental cover redundant, but it puts it in proportion.

What do claims actually fail on in practice?

Almost never on a risk having been uninsured. The more common reason is that the agreed sum no longer matches the value, or that a duty under the policy was breached. German insurance contract law provides several mechanisms for this, and most of them reduce the payment rather than refuse it outright; which makes them inconspicuous and expensive all the same.

• Underinsurance: if the sum insured is substantially lower than the insured value at the time of loss, the insurer only pays in the ratio between the two (§75 VVG). For an asset insured years ago at the prices of the day, this is the most likely reason for a reduced payment. An indexation clause and a regular review of the sum insured are therefore part of the operations manager's job.
• Pre-contractual disclosure: whatever the insurer asks in text form before the contract is concluded must be answered in full (§19 VVG). Undisclosed prior losses or an inaccurately described technology can later lead to rescission or a reduced payment.
• Increase of risk: if the risk increases after the contract is concluded, the insurer must be notified (§23 VVG). This becomes relevant when an existing park is later extended with storage, or the mode of operation changes.
• Gross negligence: if the policyholder causes the loss through gross negligence, the insurer may reduce its payment in proportion to the severity of the fault (§81 Abs. 2 VVG). Missed maintenance or ignored insurer requirements are the usual way in; the old all-or-nothing rule is gone, but a proportionate cut is enough to hurt.
• Deductibles and series losses: the deductible applies per loss event. Whether a hailstorm causing failures across many module rows over several weeks counts as one event or many is decided by the series-loss clause. That can be the difference between one deductible and a dozen.
• Internal breakdown and ageing: wear, gradual performance loss and the degradation of battery cells are not insured events but the expected course of operation. Manufacturer and performance warranties cover that ground (The battery as a real asset: lifespan, degradation and warranties of a grid-scale storage system).

What is different about battery storage?

Fire risk, and above all how the insurer deals with it. For a solar park, fire is one possible event among several; for a large-scale storage asset it is the one that sets the terms. Lithium cells can enter a self-reinforcing thermal runaway after mechanical damage, overcharging or a fault in the battery management system, and that runaway can be cooled with water but not extinguished in the conventional sense. Property insurers therefore do not write such assets on request but against requirements: containers set apart at defined distances, fire and gas detection, retention of firefighting water, a fire safety concept agreed with the local fire service, and evidence that cells and battery management have been tested to the relevant standards. For you as an investor that is good news in uncomfortable packaging. A storage project's insurability is an independent second opinion on its technical quality. If a provider can produce the fire safety concept and the insurer's confirmation of cover, someone with their own money at risk has reviewed the project. If both are "in preparation", that too is information, namely about how far the project has actually got (How does a grid-scale battery storage system work? Design, operation and revenue logic explained, Risks in BESS direct investments, and how they are structurally addressed).

How much does business interruption cover really deliver?

That turns on a figure which is rarely discussed: the basis of calculation. Business interruption cover replaces lost revenue and continuing costs for the duration of the outage, capped by the agreed indemnity period. For a trade business with steady turnover, lost revenue is easy to establish. For a solar park or storage asset it is not: income arises from direct marketing and the market premium (Direct marketing and the market premium: how a solar park earns its money) or from an offtake agreement (Understanding PPAs: how power purchase agreements make solar park revenues predictable), and for storage it moves with price spreads. Whether the policy uses the average of previous years, a value fixed in the contract, or the actual market price during the outage decides the difference between adequate compensation and a token one. Two further figures belong here: the waiting period before cover starts, and the indemnity period itself. A transformer failure with a long lead time for the replacement unit can stretch the outage well past a tightly set indemnity period, and from that point on you carry the loss.

How does a loss work out for tax?

In both directions, and the second one surprises many people. Premiums are fully deductible as business expenses under §4 Abs. 4 EStG and reduce profit like maintenance or lease payments. When a loss occurs, however, the insurer's payment is business income. With a total loss it turns awkward: once the asset leaves the business, the difference between the payout and the residual book value becomes profit. Because the investment deduction and the special depreciation allowance pushed the book value down sharply in the early years, that difference can be substantial; the insurance payment of all things then triggers a tax bill, at the very moment the money is needed for rebuilding. This is precisely what the replacement reserve of R 6.6 EStR exists for. Where an asset leaves the business as a result of force majeure and against compensation, and the guidelines expressly count fire, storm and flood as well as other unavoidable events such as theft, the realised hidden reserves may be rolled over into a functionally equivalent replacement asset. If no replacement has been acquired by year end, a tax-free reserve can be formed provided the replacement is seriously planned and expected. For movable assets it must be released to profit at the end of the following financial year if nothing has been acquired by then; in individual cases that deadline can be extended to up to four years. The principles apply accordingly where profit is determined by cash-basis accounting under §4 Abs. 3 EStG, so contrary to a widespread assumption they are not reserved for those preparing a balance sheet. In practice: after a total loss, the decision about rebuilding is not only a commercial one but also a tax one, and it should be taken early with your tax adviser.

What happens to the IAB if the asset is destroyed?

This question is not expressly settled in the statute, and that is worth knowing before relying on an answer. §7g Abs. 4 EStG requires the qualifying asset to be leased out or used exclusively or almost exclusively for business purposes in a domestic permanent establishment until the end of the financial year following acquisition; if it is not, the reduction, the special depreciation and the add-back must be reversed. Reversing the IAB: what happens if you don't invest, deadlines, interest, ways out describes how that reversal works, and Investitionsabzugsbetrag: all §7g EStG requirements, and who can use it covers the requirements more generally. A fire in the second year ends that use without anyone having done anything wrong. Administrative practice and the commentary treat an early disposal as harmless where the reasons lie in the asset itself or in force majeure; that line originates in the law on investment grants and is carried across to §7g. It does not appear in the wording of §7g. This is no reason for alarm, but it is a clear instruction: a total loss within the retention period belongs on your tax adviser's desk immediately, and a prompt replacement is here too the argument that resolves the matter most cleanly.

What does the financing bank require?

Access to the insurance proceeds. Anyone financing a direct investment with debt (Financing a direct investment: bank loan, KfW 270 and the pitfalls) gives the bank the asset as security. Because under §95 BGB it is precisely not part of the land, that is done by transfer of title by way of security rather than through a land charge. So that this security does not become worthless after a loss, the bank will also take an assignment of the claims under the property policy (§398 BGB) and have the insurer acknowledge it. In normal operation this changes nothing for you; after a loss it changes the order of events. The payout then goes first towards repayment, or is released on condition that it is used for rebuilding. So ask before you sign how the assignment is structured and whether rebuilding takes priority over an early repayment. Both are negotiable, and both decide in an emergency whether the business carries on or is wound up.

Which questions should you put to every provider?

Insurance is one of the points where carefully prepared projects separate quickly from unfinished ones, because the answers either exist as documents or they do not (How to tell a trustworthy provider of energy direct investments). Seven questions are enough:

• Are the policies in the data room in full, including the terms and conditions, and not just as a one-page confirmation of cover?
• Who is the policyholder, and in what capacity am I protected as an investor?
• What value is the sum insured based on, replacement value or actual cash value, and how is it adjusted over the term?
• How long is the indemnity period of the business interruption cover, and on what basis is lost revenue calculated?
• How high are the deductibles, and how is a series loss defined in the wording?
• Is the premium included in the financial model as a running cost, and with what annual escalation?
• For storage: is there a fire safety concept, and what requirements has the property insurer attached to it?

What insurance does not cover

The commercial risks. A policy replaces damaged hardware and the income lost because of an insured physical loss. It does not replace revenue that fails to arrive because power prices have fallen or because prices are negative in many hours (Negative electricity prices: what they mean for solar and storage investors). It covers no regulatory change, for instance to grid fees (Grid fees for battery storage: the exemption until 2029 and the AgNeS reform), no weaker degradation curve than planned, and no insolvency of a party involved (Provider or operator insolvency: what happens to your direct investment). Insurance therefore takes exactly one category of risk out of the equation, the physical one; the entrepreneurial risks remain (Risks in BESS direct investments, and how they are structurally addressed). That is not a limitation but the right expectation: a well-insured project is a carefully prepared project, yet a direct investment remains an entrepreneurial holding. We are happy to look at what cover a specific project carries, and where to follow up in the data room, in a no-obligation initial conversation. We make no return commitments in doing so.