Paul Grana
About Paul Grana
Paul Grana is a co-founder of Folsom Labs, the solar design software company behind HelioScope. Tracxn and Seedtable list the company as founded in 2011. Crunchbase lists him as co-founder and CRO, and says he was responsible for sales and marketing there.
Before Folsom Labs he worked in the solar industry on the hardware side. According to Crunchbase, he ran product management at Tigo Energy, a maker of module-level electronics. A Clean Power Hour podcast episode says he saw inefficiencies in solar design workflows and that this led him to build HelioScope.
The Angel Registry newsletter says Folsom Labs was acquired by Aurora Solar and lists him as General Manager, HelioScope at Aurora Solar. His LinkedIn profile places him in Mill Valley, California.
Crunchbase classifies Paul Grana as an individual/angel investor with one recorded personal investment: a seed round in Wattch, dated August 5, 2025. The check size is not disclosed. Other angel activity is not publicly documented in the sources reviewed.
As a founder, he has also commented on how he chose investors. After Folsom Labs raised a $1M angel round, he said that raising when the company did not need the money let it be selective, and that the investors included experienced solar industry executives.
On the Lounge deals desk, Paul Grana is listed in the Vor Systems pre-seed round, $3M, March 2026. Press coverage describes Vor Systems as a San Francisco company building an AI-enabled transaction platform for complex renewable energy deals. Gigascale Capital led the round, and Virta Ventures also took part. Reports list Paul Grana among the energy industry executives who joined, alongside Joe Song and Titiaan Palazzi. Christopher Payne, Hank Couture and Badrul Farooqi also invested.
Per FinSMEs, Vor plans to use the funds for product development and early partnerships with developers, independent power producers and infrastructure investors.
No public statement from Paul Grana on investment thesis, preferred stage or check size was found. His recorded activity points to early-stage rounds (seed and pre-seed) in energy and solar-related software, which matches his operating background in solar design software and hardware. Check size is not public.
- Vor Systems: AI-enabled transaction platform for renewable energy deals; participated in the $3M pre-seed announced March 2026.
- Wattch: listed on Crunchbase as a seed round investment dated August 2025.
- crunchbase.com/person/paul-grana
- pv-magazine-usa.com/2026/03/05/vor-systems-raises-3-million-pre-seed-f
- finsmes.com/2026/03/vor-systems-raises-3m-pre-seed-funding.html
- axios.com/pro/all-deals/2026/03/05/pro-rata-premium-first-look
- buttondown.com/AngelRegistry/archive/angel-registry-update-march-6-202
- linkedin.com/in/pgrana
- cleanpowerhour.com/podcast/paul-grana-founder-of-helioscope-sales-desi
- prnewswire.com/news-releases/folsom-labs-announces-1mm-angel-round-to-
Investing activity
Paul Grana appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Pre-seed, with a median round size of $3M. The most recent is Vor Systems (Pre-seed, $3M, Mar 2026).
Paul Grana most often invests alongside Gigascale Capital, Hank Couture, Christopher Payne and Titiaan Palazzi, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Paul Grana
Who is Paul Grana?
Paul Grana is a co-founder of Folsom Labs, the company behind HelioScope solar design software, which was later acquired by Aurora Solar. He also invests as an angel.
Has Paul Grana invested in AI startups?
Yes. He took part in Vor Systems' $3M pre-seed round in March 2026. Vor builds an AI-enabled transaction platform for renewable energy deals.
What check size does Paul Grana write?
His check size is not public. The sources reviewed do not state his check sizes, including for Vor Systems.
What stage does Paul Grana invest in?
His recorded investments are a pre-seed round (Vor Systems, March 2026) and a seed round (Wattch, August 2025).
What sectors suits a pitch to Paul Grana?
His background is in solar and energy software, and his publicly known AI investment is in energy deal-making. He has not published a formal thesis, so energy and climate software is an inference from his record.
Where can founders find Paul Grana online?
He has a LinkedIn profile at linkedin.com/in/pgrana. No personal site or X account was confirmed.
Is Paul Grana an angel investor?
Yes. Paul Grana invests personally as an angel.
What AI companies has Paul Grana invested in?
Paul Grana's AI investments include Vor Systems. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Paul Grana invest at?
In the rounds tracked on Lounge, Paul Grana has invested at Pre-seed, with a median round of $3M.
Who does Paul Grana co-invest with?
Paul Grana's most frequent co-investors on Lounge are Gigascale Capital (1 deal), Hank Couture (1 deal), Christopher Payne (1 deal), Titiaan Palazzi (1 deal) and Virta Ventures (1 deal).