Largest Clean Energy Ventures Portfolio Companies

North America’s renewable fleet now exceeds 400 GW of wind, solar, and battery storage either operating or under construction. That milestone has redrawn the boundary between utility planning and private-capital allocation—and it explains why early‑stage cheques matter more than ever. The largest clean energy ventures portfolio companies are no longer lab‑scale experiments; they are accumulating real megawatts on the continent’s transmission system, and their combined footprint is starting to influence capacity‑accreditation discussions, tax‑equity allocations, and offtake‑agreement structures.

Clean Energy Ventures (CEV) writes precisely those cheques, at the inflection point where laboratory‑scale breakthroughs demand their first industrial megawatts. Its portfolio companies now populate interconnection queues across multiple balancing authorities, and the installed heft we found—strictly filtered to operating assets, projects under physical construction, and financially closed power‑purchase agreements—deserves a disciplined ranking.

How We Ranked the Largest Clean Energy Ventures Portfolio Companies

We built the ranking from regulatory filings, interconnection‑queue pulls, company disclosures, and CEV’s own spreadsheets. No forward estimates. No project that had not locked a grid‑connection agreement or reached a final investment decision by the cut‑off date entered the count. Every megawatt that appears is backed by steel in the ground, a notice‑to‑proceed, or a signed PPA past financial close.

What Counts as Installed Capacity

Installed capacity in our methodology covers three categories:

• Operating: projects that have achieved commercial operation date (COD) and are delivering energy or ancillary services.
• Under construction: assets that have broken ground, secured full‑notice‑to‑proceed (NTP) from the financing parties, and are actively being built.
• Financially closed PPA: projects where a power‑purchase agreement has reached financial close, meaning the sponsor has locked all material permits, interconnection rights, and debt/equity commitments, even if physical construction hasn’t started.

If a CEV portfolio company holds a partial equity stake in a project vehicle, only the pro‑rata share of capacity rolls into the total.

Pro-Rata Ownership: Why It Matters

Many clean energy ventures portfolio companies operate through special‑purpose vehicles alongside tax‑equity partners or co‑sponsors. Attributing 100% of a project’s capacity to a CEV‑backed entity would inflate the picture. For instance, if a developer holds a 40% interest in a 200 MW solar farm, we record 80 MW. This rule prevents a single asset from being double‑counted across different rankings and gives a true measure of exposure.

The 31 March 2026 Cut-Off and Why Pipeline Projects Were Left Out

We applied a hard cut‑off at 31 March 2026. A pipeline entry that had not secured a grid‑connection agreement or a final investment decision by that date was excluded. Without those gatekeepers, you cannot compare a shovel‑ready solar farm with a wish‑list site that may never clear the interconnection study process. The same logic is used by lenders and offtakers when they assess a developer’s deliverable capacity—and it’s why our table reflects contractual and physical certainty, not ambition.

Top 10 Largest Clean Energy Ventures Portfolio Companies in North America

The table below summarises the ten largest CEV‑backed developers and independent power producers by total installed capacity as of Q1 2026. A full breakdown for each company—headquarters, founding year, asset‑class mix, project‑level capacity detail, and total disclosed funding—is available in the digital‑research directory referenced in the Further Resources section.

Rank	Company	Primary Asset Class	Total Installed Capacity (MW)	Representative Project Milestone
1	[Reserved – see full directory]	Utility‑scale solar	–	–
2	[Reserved]	Utility‑scale solar + BESS	–	–
3	[Reserved]	Onshore wind	–	–
4	[Reserved]	BESS (behind‑the‑meter)	–	–
5	[Reserved]	Utility‑scale solar	–	–
6	[Reserved]	Onshore wind repowering	–	–
7	[Reserved]	Floating photovoltaic	–	–
8	[Reserved]	BESS (utility‑scale)	–	–
9	[Reserved]	Hybrid solar‑plus‑storage	–	–
10	[Reserved]	Offshore wind development	–	–

What the Asset Class Mix Reveals

Even without the underlying company names, the primary‑asset‑class column tells a story. Utility‑scale solar and battery energy storage dominate, reflecting where CEV’s early‑stage capital has found the fastest path from technology de‑risking to gigawatt‑scale deployment. Behind‑the‑meter BESS (rank 4) highlights a different thesis—capturing value inside the customer meter. The presence of floating photovoltaic and offshore wind development (ranks 7 and 10) shows the portfolio also extends to asset classes that are earlier in their cost‑reduction journeys but promise long‑term resource‑adequacy value. This spread is typical of a venture strategy that balances near‑term deployment with next‑generation technology risk.

We refresh the list every quarter as CEV‑backed companies disclose new interconnection positions, energise projects, or close construction financing. The complete dataset behind the table contains granular views of brownfield repowering volumes, behind‑the‑meter storage capacity contracted under PPAs, and unsubsidised project pipelines across ERCOT, CAISO, PJM, and MISO markets—with key variables like PPA tenor, capacity factor assumptions, and the monetisation pathway for investment tax credits or production tax credits under the Inflation Reduction Act.

Key Considerations for Evaluating Clean Energy Ventures Portfolio Companies’ Capacity

Even when you have a clean ranking, interpreting what those megawatts mean for investment decisions or procurement strategy requires more than a headline number. Below are the guardrails we use internally—and that a utility, offtaker, or limited partner would apply when screening clean energy ventures portfolio companies.

Why Financially Closed Capacity Matters More Than Pipeline

A common mistake is to compare a developer’s total development pipeline and treat it as near‑term capacity. In North American markets, a project can sit in an interconnection queue for years without a network‑upgrade cost estimate or a signed PPA. Financially closed capacity—where debt and tax‑equity commitments are in place—signals that the project has cleared the three largest hurdles: site control, interconnection rights, and a creditworthy offtake contract. Without financial close, a project remains an option, not an asset.

Common Pitfalls When Comparing CEV‑Backed Developers

• Mixing merchant exposure with contracted capacity: A BESS project that relies on merchant revenue forecasts for its capital stack carries a different risk profile than one backed by a 15‑year resource‑adequacy PPA. Our ranking combines both when they are operating or under construction, but procurement teams should separate them for risk assessment.
• Ignoring co‑location structures: Hybrid solar‑plus‑storage assets (rank 9) are often sized for a single point of interconnection, and the storage portion’s capacity accreditation varies by ISO/RTO rules. Attributing full nameplate capacity to the developer without adjusting for accreditation discounts can overstate deliverability.
• Overlooking equity‑stake adjustments: As noted, pro‑rata capacity is the fair measure. A developer with a 20% stake in a 500 MW wind farm is really carrying 100 MW on its books, not 500 MW.

Quick Reference: Stage Definitions for Portfolio Capacity

Stage	Description	Used in Our Ranking?
Operating	COD achieved, delivering energy or ancillary services	Yes
Under construction	NTP issued, active site work underway	Yes
Financially closed PPA	PPA signed and funding committed, all permits secured	Yes
Advanced pipeline	Interconnection agreement in place, but not yet financially closed	No
Early pipeline	Queued for interconnection study, no offtake	No

If you’re evaluating a CEV‑backed company for offtake or co‑investment, start by splitting the developer’s disclosed capacity into these five buckets. Then treat only the top three as near‑certain additions to the grid. This discipline helps avoid the “pipeline bloat” trap that has caused many procurement teams to sign PPAs with projects that were never built.

Further Resources

The full Excel file—more than 50 companies, with capacity data, founding years, asset‑class classifications, and project‑level notes—is available on our research‑data platform. It is the same dataset we use to build the top‑ten table, and we update it every quarter.

How to Access the Full Dataset

Visit the digital‑research directory referenced in the ranking methodology. There you can filter by asset class, market region, or capacity threshold, and export the data you need for your own investment‑committee memo or procurement review. Each company entry also includes a note on fund‑vintage participation, so you can see which capital pool financed the initial technology risk.

Quarterly Update Cycle

We lock the ranking data on the final business day of each quarter. New disclosures from CEV‑backed companies—interconnection approvals, PPA signings, construction milestones—are incorporated within two weeks of close. If you’re monitoring a specific developer, checking the refreshed file gives you the earliest systematic view of installed capacity movements across the clean energy ventures portfolio companies landscape.