
Knowledge from practitioners in the solar market
What a solar park really costs, how to value existing systems, which contracts count and how taxes and insurance affect the return. Written by people who work with projects every day.

RTB project rights for photovoltaics: why ready to build does not always mean ready to build
What project rights for photovoltaics are really worth: which permits, grid connection commitments and contracts have to be in place before a project can count as ready to build.
Fabian Böke, Founder and managing director, OMSI 24All articles
Well-founded articles and experience from practice on buying, valuing and operating solar parks and battery storage.
Buying & valuing· 11 min read
RTB project rights for photovoltaics: why ready to build does not always mean ready to build
What project rights for photovoltaics are really worth: which permits, grid connection commitments and contracts have to be in place before a project can count as ready to build.
Fabian BökeRead
Storage· 8 min read
Why grid connections are becoming the biggest risk for battery storage projects
Why the grid connection decides the success or failure of a battery storage project and what investors should check about connection capacity, commitments and deadlines.
Fabian BökeRead
Buying & valuing· 4 min read
Valuing existing systems – what really matters with operating solar parks
How to value an operating solar park properly: yield history, remuneration, condition of the technology, contracts and the purchase price per kilowatt peak in context.
Fabian BökeRead
Operation & yield· 4 min read
Insuring solar parks – what it really costs and what matters in practice
What insuring a solar park costs, which risks actually have to be covered and what operators and investors should look out for in practice.
Fabian BökeRead
Tax & law· 4 min read
Taxes on a solar park investment – how structure and design affect the return
How depreciation, the investment deduction (IAB), legal form and structuring affect the return of a photovoltaic system. An overview for investors.
Fabian BökeRead
Tax & law· 4 min read
Contracts and legal basics – why a solar park is decided on paper
Lease, grid connection, purchase agreement and operations management: why a solar park is decided on paper and which contract contents investors should review.
Fabian BökeRead
Operation & yield· 4 min read
Profitability of a solar park – how to arrive at a realistic valuation
Yield forecast, revenue and marketing, operating costs, financing and taxes: how to judge the profitability of a solar park as an overall picture.
Fabian BökeRead
Operation & yield· 5 min read
Solar park income: how does a solar park generate revenue?
Revenue from the EEG feed-in tariff, direct marketing and power purchase agreements, the factors behind the yield and why the income of a solar park is no product of chance.
Fabian BökeRead
Buying & valuing· 6 min read
Purchase price, lease and ancillary costs: how the true total investment of a solar park comes about
The price per kWp is only the visible part: how purchase price, lease and ancillary costs together make up the true total investment of a solar park, and how to compare.
Fabian BökeRead
Buying & valuing· 5 min read
Buying a solar park: what a fair price is – and why the truth is rarely in the kWp
Why the price per kWp rarely tells the whole story and what investors should look at when buying their first solar park, to judge a project realistically.
Fabian BökeRead
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