For IAB Investors / Tax Advisors

Reviewed three times:
technology, economics, law.

Investment deduction under section 7g of the German Income Tax Act: for IAB investments in PV and battery storage, a clean and documented review is what counts. Our PBA seal confirms the triple review of the plant, for investors and their tax advisors.

PBA seal: reviewed & certified — technology, economics, law — confirmed for IAB under section 7g

At a glance: The PBA seal documents the triple review of a PV or BESS investment, transparently for investor, tax advisor and tax office.

Swornpublicly appointed experts
VdScertified
TÜVcertified expert assessors
independentof developers & IAB providers
100%manufacturer-independent

What we do for you

IAB-compliant plant review

Technical, economic and legal review of the investment, tailored to the requirements of section 7g. Before the investment decision or to safeguard an existing commitment.

Section 7gTriple reviewTÜV-certified
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PBA seal

Reviewed and certified: the seal with an individual review ID documents the triple review towards the tax office and clients, uniquely assigned to the reviewed plant.

Review IDReviewed & certifiedCertificate

Commissioning inspection

Independent inspection at commissioning: fully erected, operational, connected to standard? Documents the point in time decisive for IAB, robust for a tax audit.

CommissioningIEC 62446Evidence
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Frequently asked questions — IAB & tax advisors

What exactly does the PBA seal confirm?

The triple review of the specific plant: technology (quality, components, yield), economics (purchase price, revenues, costs) and law (contracts, permits, operator position). Each seal carries an individual review ID and is uniquely assigned to the reviewed plant.

Why does an independent review matter for an IAB investment?

The investment deduction under section 7g presupposes an actual business investment. Overpriced or technically deficient plants jeopardise both return and tax recognition. An independent review creates the documented fact base, before signing.

When should the review take place?

Ideally before the purchase contract is concluded, so the findings feed into price and contract design. A review after commissioning is also possible.

What happens after the holding period ends?

Many IAB investors then wish to sell the plant. We prepare the valuation and support the sale process on a technical basis: documentation, value reasoning and buyer Q&A.

The provider of my PV investment is insolvent — what now?

We first establish whether the plant exists, is operational and has been valued correctly. On that basis we support either unwinding or continued operation, with court-proof documentation towards the insolvency administrator and the tax office.

Do you work together with tax advisors?

Yes, regularly. We provide the technical and economic fact base; the tax assessment remains with the tax advisor. On request we agree scope and documentation directly with the firm.

Request a quote

Tell us about the planned investment. We will respond within 24 hours with an initial assessment and a transparent fixed-price offer.

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Last updated: 2026-09-23