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Battery storage – the backbone of the energy transition

Deep in the BESS market since my 2024 China trip: from EPC through procurement and operation to power trading on the EEX, PPAs and regulation.

Dennis Weidner

Why this drives me

Since my 2024 China trip, energy storage has not let go of me. I learn directly from the people who actually build and run these systems.

Dennis Weidner

On a trip through China in 2024, I understood how central battery storage will be. Battery Energy Storage Systems (BESS) are units of every size that store electricity from photovoltaics, wind and other sources – making it predictable and tradable. Since then I have been deep in this market and keep building my network.

A market only just gaining speed

Storage is the missing piece of the energy transition: without it, green power stays tied to weather and time of day. Global additions have recently nearly doubled year over year.

Global battery storage additions: annual additions in GW (IEA).
Global battery storage additions: annual additions in GW (IEA).

What I cover

I think technology, trading and regulation together – from EPC contractor through procurement and operation to power trading. I am in weekly exchange with lawyers on current regulation, work with partners holding an energy-supplier licence (power trading and arbitrage on the EEX Leipzig, PPAs and long-term contracts) and support several advisory mandates – all the way to site acquisition. I regularly attend industry trade fairs and speak the language of the people who actually build and run these systems.

How I work

With the same attitude as in everything I do: practice before theory, honest about opportunities and risks, and with a network grown over years through real collaboration. I do not talk about the market, I am in it.

Frequently Asked Questions

What is a BESS?

A Battery Energy Storage System is a storage unit that buffers electricity from photovoltaics, wind or the grid and releases it later. This makes volatile green power predictable and tradable.

Why is battery storage so important for the energy transition?

Sun and wind do not deliver evenly. Storage decouples generation and consumption, stabilizes the grid and enables trading power across time – the missing piece between renewable generation and reliable supply.

In what role are you active in energy?

As an advisor and strategist across the whole chain: EPC, procurement, operation, power trading (EEX, PPAs), regulation and site acquisition – in close exchange with lawyers, operators and licensed energy suppliers.

Let's talk.

Investment, advisory, partnership or simply a good exchange – I read every message myself.

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