and extracts the following text as a script body — the dev server then fails its dependency scan with `Expected ";" but found "non"` from the words "non-allowlisted hosts", which breaks e2e. So, what this buys, so nobody reads more or less into it: blocks external `script src=` from non-allowlisted hosts blocks injected inline scripts — each one is pinned by hash blocks fetch/XHR/WebSocket exfiltration (connect-src allowlist) blocks form-action, base-uri, object-src vectors does not stop image-based exfiltration — img-src must allow https: because event media comes from arbitrary publishers' og:image The cost of hashing is that an inline script edited after the hashes are computed is silently refused by the browser. That is why the violation reporter below exists: report-uri/report-to are ignored in a meta element and Pages serves no CSP header, so violations are caught in-page and sent to PostHog instead (src/lib/csp-report.ts, #241). frame-ancestors is deliberately NOT in this string: it is ignored in a meta element and browsers log a warning about it on every page load. It lives in public/_headers instead, ready for a CDN in front of Pages. X-Frame-Options (set there too) is the clickjacking control that actually applies today. */ }
deployment

UK Delivers Europe's Largest Vanadium Flow Battery — 20.7 MWh in East Sussex

| Battery Revolution

Invinity Energy Systems completed delivery and commissioning of the Copwood VFB Energy Hub in East Sussex, England on May 11, 2026 — the largest vanadium flow battery installation in Europe at 20.7 MWh across 90 individual flow battery units. The system is co-located with a 3 MW solar array and draws on the UK government's Longer Duration Energy Storage (LDES) program and National Wealth Fund financing. Unlike lithium-ion, vanadium flow batteries use an aqueous electrolyte that cannot burn or explode, making them particularly suitable for co-location with buildings and communities. The Copwood project provides 8+ hours of discharge duration — addressing the multi-day balancing gap that shorter-duration lithium-ion BESS cannot fill. The project validates vanadium flow battery technology at utility scale and represents an important diversification of grid storage chemistries beyond lithium-ion dominance. UK grid operator National Grid Electricity System Operator has cited long-duration storage as critical for meeting the government's goal of a fully decarbonised electricity system by 2035.

Media

Invinity's Copwood VFB Energy Hub in East Sussex — Europe's largest vanadium flow battery at 20.7 MWh
Invinity's Copwood VFB Energy Hub in East Sussex — Europe's largest vanadium flow battery at 20.7 MWh — Electrek

Sources

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