Europe’s accelerating renewable energy transition presents a growing challenge: volatility in the value of renewable production. Solar and wind often generate when prices are low, which erodes revenue for asset owners and creates uncertainty for traders. In 2024, German solar capture rates fell below 50 percent, and negative pricing hours increased by more than 50 percent (GEM Energy Analytics).
Until now, there has been no standardised way to trade the forward price of renewable generation. enmacc addresses this gap with the launch of the first Standardised Wholesale PPA. This contract gives utilities, portfolio managers, and traders a way to hedge or trade renewable production using a format designed for transparency, price discovery, and scalable execution.
Why now?
As discussed in our recent webinar, the risks around renewable production are becoming more complex. Capture rate erosion, grid congestion, volume volatility, and regulatory uncertainty are exposing limitations in traditional PPA structures.
At the same time, liquidity and price discovery remain elusive for most renewable-linked contracts. Until now, PPAs have largely been bespoke, long-tenor agreements that were not designed for secondary trading or active hedging.
The Standardised Wholesale PPA marks a shift. It introduces a standardised, index-settled forward structure that separates idiosyncratic asset risk from tradable forward value, much like baseload and peakload.
This is the first contract of its kind available to hedge or trade the expected value of solar and wind production in Germany, backed by live quotes and growing liquidity on enmacc.
What are Pay-as-Indexed PPAs?
The Pay-as-Indexed PPA is a standardised forward contract for solar and wind production. It is available with either financial or physical settlement and is traded via RFQ on the enmacc platform.
Each contract settles against the enwex index, a transparent benchmark that reflects daily forecasted solar or wind output in Germany. The index is built on ECMWF weather data and is published every morning at 10:00 CET.
This structure allows market participants to lock in a fixed price per megawatt of installed capacity, rather than trading fixed volumes. This delinks the tradable price component of renewable production from its physical idiosyncrasies, enabling real market participation.
What makes it different?
- Trades installed capacity (MW) – not energy volume
- Settles daily against transparent, forecast-aligned index values
- Works like baseload or peakload contracts, but for renewable generation
- Executed via Request for Quote (RFQ), directly on the enmacc platform
Understanding these features is key to appreciating the benefits that index-settled PPAs bring to both utilities and traders.
How settlement works
1. Financial settlement:
- Traders agree on a fixed price per megawatt-hour
- Each day, the enwex index publishes forecasted hourly utilisation
- The daily volume is calculated by multiplying installed capacity by enwex utilisation
- The buyer and seller settle the difference between the fixed price and the volume-weighted index price over the contract period
2. Physical settlement:
- The seller is obligated to deliver forecasted volume into the market each day, based on enwex
- The buyer pays the agreed fixed price per megawatt-hour
- Forecast is published daily, enabling nomination into the day-ahead market
This dual-settlement structure makes the product useful for both speculative trading and operational hedging.
Single-leg vs. Spread Trading:
Participants can trade Standardised Wholesale PPAs in two ways:
Single-leg: Hedge or take a position on the forward price of solar or wind production. This is not a hedge against capture rate risk, but against the expected value of forecasted production.
Spread: Combine with a baseload hedge to express a view on the capture rate. For example, sell baseload and buy solar to express the view that solar capture rates will rise relative to baseload.
This flexibility makes the product suitable for both utilities looking to reduce earnings volatility and traders seeking directional exposure to renewable production.
What makes it different?
- Trades installed capacity (MW), not fixed volumes
- Settles against a transparent, forecast-based index
- Tradable via RFQ, with fast execution and visible pricing
- Designed to scale across products and geographies
Who is it for?
Utilities and portfolio managers:
- Hedge pay-as-produced exposure through a standardised forward price
- Lock in a predictable price for forward generation
- Simplify financial planning and portfolio modelling
Traders and risk takers:
- Take structured positions on the expected value of solar and wind generation
- Build spread strategies around capture rate differences
- Trade against real market signals using forecast-aligned data
How our PPAs solve structural challenges
The Standardised Wholesale PPA is designed to address four key barriers that have limited renewable trading:
- Lack of standardisation: replaces bespoke deals with repeatable contract logic
- Pricing opacity: enwex provides a transparent, verifiable benchmark
- Execution friction: RFQs remove manual negotiation and accelerate flow
- Illiquid risk: enables structured trading of renewable production and capture rate spreads
The Standardised Wholesale PPA introduces a new way to trade renewable generation. For the first time, utilities and traders have access to a standardised contract for solar and wind that offers structure, transparency, and scale.
The market for renewable PPAs is evolving. With Standardised Wholesale PPAs, it becomes tradable.
