Why 'Perfect' Battery Models Keep Failing in Reality - Harmony Energy

Most BESS revenue forecasts aren't wrong, they're just being used for the wrong thing. The gap between a valuation-grade forecast and what a project actually earns in a live market is where BESS developers win or lose. The developers who survive that gap are the ones who design for uncertainty from the start - not after the fact. Recorded live at the Investing in Battery Energy Storage conference, Paul Mason, Chief Investment Officer of Harmony Energy, joins Ed Porter for a return appearance on Transmission. They cover: Why treating a revenue forecast as a fixed cash flow is the most common mistake in BESS development. How the listed fund model enabled GB BESS to scale. Why splitting BESS revenues into ancillary, wholesale, and balancing mechanism streams is now a misleading framework. How Harmony selects new markets in France and Germany: renewable penetration, grid-first site selection, and why any business case dependent on high ancillary revenues is a losing strategy. What good optimizer relationships actually look like. Got follow-up questions? Ask Ko, Modo Energy's AI analyst : https://help.modo.energy/en/articles/... Transcript: https://modoenergy.com/transmission-p... ⏱ CHAPTERS ──────────────────────────────────────────────────────────── 0:00 Introduction 1:16 What do BESS developers get wrong when building an IPP? 3:25 Why full EPC contracts — and why they still hired project managers 5:28 Duration strategy: the case for 2-hour batteries early 7:00 The full BESS lifecycle — develop, build, operate, sell 8:25 How Harmony raised capital through listed funds (and why it worked then) 10:45 Why listed fund capital flowed out and what came next 13:20 The Foresight asset sale: private vs. public valuation 15:08 New markets: what Harmony looks for in France, Germany and beyond 18:05 Market timing — should you enter early or wait for wholesale dynamics? 20:12 Grid connection across Europe: where it works and where it doesn't 22:33 Operating a live fleet: what drives performance once assets are running 24:10 How to work with optimizers without burning the relationship 26:30 BM trading trials with Tesla — what the data showed 28:45 Is GB still exciting for Harmony, or is it old hat? 30:20 Audience Q&A: colocation, revenue cannibalization, and market saturation 32:35 If you ran European power: one thing to fix ──────────────────────────────────────────────────────────── Transmission is hosted by Ed Porter, Director EMEA & APAC at Modo Energy. New episodes every week.