# Tandem PV funding: rounds and investors > Tandem PV has raised $12M across 2 rounds since 2025. Investors include National Science Foundation, US Department of Energy and Eclipse. Source: https://millionrounds.com/company/tandem-pv (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *Tandem PV* 2 rounds we have observed, with the 3 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. Energy Raised 3 months ago Funding summary Updated 26 Oct 2026 **$12M** raised across 2 rounds since 2025, from 2 sources **$4.0M** Grant **$7.7M** Grant - **Latest round:** Grant, $7.7M Aug 2026 - **Step-up i:** 1.9× - **Investors:** 3 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2026 **$4.0M** Grant **$7.7M** Grant - **First round:** Grant, $4.0M - **Biggest round:** $7.7M - **Between rounds:** 13 months ## The rounds - **Aug 2026** Grant **$7.7M** *1 new* *2 returning* [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) [Eclipse](https://millionrounds.com/fund/eclipse) Source recorded - **Jul 2025** Grant **$4.0M** *2 new* [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Source recorded ## Founders and team From Tandem PV's own website and the SEC filings it signed: 2 founders, 5 on the team. **Colin Bailie** Founder & CTO *Named on its 2022 Form D* **Chris Eberspacher** Co-Founder *Named on its 2022 Form D* - **Robert Meagley** Vice President of Quality - **Saritha Peruri** Vice President of Commercialization - **Scott Wharton** CEO - **Jean-Claude Calegari** Chief Financial Officer - **Clemens Hofbauer** VP of Manufacturing On the board, as filed i *Rik Wehbring* ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Grant** 2025 **Grant** 2026 [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) [Eclipse](https://millionrounds.com/fund/eclipse) ## Everyone who backed them [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government **2** rounds [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) Government **2** rounds [Eclipse](https://millionrounds.com/fund/eclipse) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=tandem-pv). ## Also claim to have backed them These 6 firms list Tandem PV as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above. [Band of Angels](https://millionrounds.com/fund/band-of-angels) Angel network Per its own site [Constellation Energy](https://millionrounds.com/fund/constellation-energy) VC firm Per its own site [Beyond Earth Ventures](https://millionrounds.com/fund/beyond-earth-ventures) VC firm Per its own site [Beyond Earth LLC](https://millionrounds.com/fund/beyond-earth-llc) Investor Per its own site [Planetary Technologies](https://millionrounds.com/fund/planetary-technologies) Company Per its own site [Wealthing VC Club](https://millionrounds.com/fund/wealthing-vc-club) VC firm Per its own site ## Quick answers about Tandem PV ### Who invested in Tandem PV? Tandem PV's investors include National Science Foundation, US Department of Energy and Eclipse. ### How much has Tandem PV raised? Tandem PV has raised $12M across 2 rounds since 2025. ### When did Tandem PV last raise? Tandem PV's most recent round was a Grant of $7.7M in Aug 2026. ### What was Tandem PV's biggest round? Its most recent round, $7.7M in Aug 2026, is also its largest on record. ### Who backed Tandem PV first? Tandem PV's first round on record, in Jul 2025, was backed by National Science Foundation and US Department of Energy. ### What stage is Tandem PV at? Tandem PV's latest named round is a Grant, in Aug 2026. ### Where is Tandem PV based? Tandem PV is based in the United States. ## Companies like Tandem PV In the same sector, and raised in the last eighteen months. [**Amogy** $125M · Oct 2026](https://millionrounds.com/company/amogy)[**LanzaJet** $67M · Oct 2026](https://millionrounds.com/company/lanzajet)[**Pivot Energy** $500M · Oct 2026](https://millionrounds.com/company/pivot-energy)[**Peak Energy** $163M · Oct 2026](https://millionrounds.com/company/peak-energy)[**Pennsylvania American Water** $43M · Oct 2026](https://millionrounds.com/company/pennsylvania-american-water)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app