E-world 2026: BESS, Trading, Redispatch — How the Mittelstand Makes Money With Battery Storage

Mid-market battery storage (BESS) between 2 and 30 MW is the underserved gap of the German energy transition. Large-scale storage (>30 MW) is professionally marketed by optimizers such as enspired — with, according to their own figures, more than 5 GW of flexibility portfolio and over 80 grid-scale batteries under management. Small storage (<1 MW) is served by subsidy programs. In between, there is a gap into which the Mittelstand falls. At E-world 2026 in Essen, we discussed with traders, optimizers, and potential partners such as Flower how to close this gap — through three concrete revenue instruments.

E-world 2026 in numbers

E-world energy & water is Europe's largest energy trade fair. The 2026 edition took place from 10 to 12 February at Messe Essen. According to the organizer, around 980 exhibitors and 33,000 visitors were counted in 2026. The thematic clusters ranged from Smart Energy and Trading Floor to Hydrogen Solutions. For NEXA, it was the most important February date: no other event packs BESS, trading, redispatch, and energy digitalization this densely together.

Three revenue instruments for mid-market BESS

Anyone planning a battery storage system in the mid-market should ideally combine three revenue sources. NEXA Horizons typically structures projects so that all three run in parallel:

1. Self-consumption optimization

Classic, well understood, fast payback. The battery buffers PV surpluses and discharges during load peaks. Suited for Mittelstand companies with a strong load profile and PV self-supply. Typical payback: 6–10 years, depending on load curve and power price.

2. Market participation via trading and direct marketing

Through partners such as Next Kraftwerke, revenues from day-ahead, intraday, and balancing energy can be unlocked. For assets above 100 kWp, direct marketing has been mandatory for years; for BESS from 2 MW, cross-market trading becomes economically interesting. Realistic additional revenue: a meaningful uplift on the LCOE calculation.

3. Redispatch 2.0 and §14a EnWG

This is the next revenue field. Anyone who today prepares an asset technically and regulatorily — remote controllability, BNetzA market premium, §14a compliance — can structurally benefit from Redispatch 2.0 revenue starting in 2027. Prerequisite: bidirectional interfaces and a direct marketer that actively trades the market.

How NEXA packages this: NEXA Own and NEXA Zero

These three instruments are what NEXA Horizons offers customers — packaged into two contract models:

• NEXA Own: The customer owns the asset. NEXA steers delivery with vetted EPC partners, structures the financing, and integrates direct marketing and trading. Suited for Mittelstand companies with a strong balance sheet and a long investment horizon.
• NEXA Zero: Zero-CAPEX contracting. An SPV carries the investment and vetted partners build and operate the system on the customer's roof, and the customer pays a fixed energy price (PPA). Trading revenue flows to NEXA — the customer benefits via a lower energy price. Suited when no balance-sheet impact or CAPEX is available.

Both models use the same three revenue instruments. The difference lies in asset ownership and the risk profile.

Highlight conversations at E-world

Flower: market entry in Germany

One of the most interesting conversations of the fair was the meeting with the Flower team on the status of their entry into the German market. The Nordic DNA — software-first on the trading side, asset-heavy on the physical infrastructure — fits remarkably well with what NEXA is building in Germany. We are staying in close contact.

enspired and the mid-market gap

The conversations with the trading and optimizer community crystallized just how large the mid-market gap really is. Large-scale storage optimization is a developed field. Standalone BESS between 2 and 30 MW, on the other hand, often fails on three points: ticket too small for institutional capital, structuring too complex for classical bank financing, no integrated origination setup. That is exactly where NEXA starts.

BRYCK THE GRID at the BRYCK Tower

In parallel with the fair, we attended THE GRID — the invite-only networking event by BRYCK that brings energy-tech startups and top investors together at the BRYCK Tower in Essen. With Vireo Ventures, World Fund, BRYCK, and HTGF as hosts and Verbund X, EnBW Ventures, and TÜV Nord Group as partners, the conversation density was extremely high. More in our analysis of the NRW capital stack.

Take-aways from E-world 2026

1. The tools for mid-market BESS monetization exist. What is missing is the platform that rolls them out in a standardized way.
2. Direct marketing alone is not enough. Only the combination with self-consumption and redispatch makes the economics robust.
3. Market entries by foreign players (Flower, others) show that the German market is currently the most important lever in Europe.
4. Capital is actively looking for mid-market BESS — what is missing is pipeline standardization. That is exactly where NEXA Horizons positions itself.