Knowledge
Regulation, method and checklists for industrial storage
This section covers the regulation, the sizing method and the checklists behind a commercial battery storage decision. It is written for decision-makers in the Mittelstand who are preparing that investment.
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Guide
Guide
Commercial battery storage guide: from load profile to acceptance
This guide describes the path to a commercial storage system in nine steps, from data collection through the feasibility study and tendering to acceptance.
24 September 2026 · 12 min read
Checklist
Checklist
Checklist: what to prepare before a feasibility study
A feasibility study for a commercial storage system needs certain documents and contacts. This checklist lists them, so the analysis can start without delay.
24 September 2026 · 5 min read
Regulation
Regulation
Grid-fee exemption for storage under §118(6) EnWG
This article explains the 4 August 2029 deadline under §118(6) EnWG, the 20-year exemption from grid fees and the conditions attached to it.
24 September 2026 · 6 min read
Regulation
The capacity charge and the highest quarter hour
Once RLM metering applies, a single quarter hour in the year sets the capacity charge for the whole billing year. This article explains what that means and where §19(2) StromNEV comes in.
24 September 2026 · 6 min read
Regulation
EnEfG and EDL-G: audit, plans and management system
This article explains at what consumption level an energy or environmental management system becomes mandatory, what an energy audit under EDL-G covers and where storage fits.
24 September 2026 · 7 min read
Regulation
AgNes: what the BNetzA grid-fee reform means for storage
The Bundesnetzagentur set out an interim position on the AgNes reform in May 2026. This article shows what is settled for storage and what is still open.
24 September 2026 · 6 min read
Method
Method
Reading a load profile: what 35,040 quarter hours tell you
This article shows how a load profile of 35,040 quarter-hour values is built, what an annual load duration curve shows and which sizing mistakes to avoid.
24 September 2026 · 7 min read
Method
Specifying a battery storage system
A solid Lastenheft (specification) for a commercial storage system covers everything from usable capacity to acceptance. This article lists its parts and the most common gaps.
24 September 2026 · 7 min read
Method
Comparing storage quotes
Two storage quotes are rarely directly comparable. Normalising capacity, power and scope to a common basis makes the real differences visible.
24 September 2026 · 6 min read
Method
Accepting a battery storage system before final payment
A storage system acceptance covers documents, the visual and safety inspection, function tests, the capacity test and defect classes, and starts the warranty.
24 September 2026 · 7 min read
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