Funded Energy Startups in Brooklyn
Across these 11 recently funded energy companies in Brooklyn, the largest disclosed round is NineDot Energy’s $65M on 2025-01-22, which sits well above mos…
Across these 11 recently funded energy companies in Brooklyn, the largest disclosed round is NineDot Energy’s $65M on 2025-01-22, which sits well above most other disclosed amounts shown (the next-largest disclosed figures are $23M on 2024-09-23 for David Energy and $30M on 2022-01-14 for BlocPower). The list also shows a tight concentration around early 2025: three entries have round dates in January 2025 (NineDot Energy on 2025-01-22 at $65M; CapeZero on 2025-01-23 at $3M; and XL Batteries is later in 2025-08-19 at $8M).
Stage information is uneven: 2 of 11 rows are labeled “undisclosed” amounts (Nuclearis Energy on 2025-08-01; EnergyHub on 2024-06-12; Kelvin on 2023-10-18), and “Series Unknown” appears in 4 of 11 rows (XL Batteries; NineDot Energy; EnergyHub; Kelvin; also Voltpost is “Series Unknown” in 2024-06-14). Temporally, rounds span from LO3 Energy’s 2021-03-11 Series B to XL Batteries’ most recent disclosed round on 2025-08-19; the newest round date in the table is 2025-08-19 (XL Batteries).
Most recent rounds
11 shownRelated listings
Frequently asked
What’s the biggest disclosed round in this Brooklyn energy slice, and how much larger is it than the rest?
NineDot Energy’s $65M disclosed round on 2025-01-22 is the only figure above $50M in the visible rows; the next-highest disclosed amounts are $30M for BlocPower (2022-01-14), $23M for David Energy (2024-09-23), and $8M for XL Batteries (2025-08-19).
Do the round dates cluster into a narrow window, or are they evenly spread out?
There is a notable early-2025 cluster: three rounds fall within two days in late January 2025—NineDot Energy ($65M) on 2025-01-22, CapeZero ($3M) on 2025-01-23, and then the next most recent early-2025 entry is XL Batteries on 2025-08-19. Outside that, dates spread across 2021-03-11 (LO3 Energy) through 2025-08-19 (XL Batteries).
How common are undisclosed amounts or “Series Unknown” labels among these 11 companies?
3 of 11 rows show “undisclosed” amounts (Nuclearis Energy on 2025-08-01; EnergyHub on 2024-06-12; Kelvin on 2023-10-18). Separately, “Series Unknown” shows up in 4 of 11 rows via XL Batteries (2025-08-19), NineDot Energy (2025-01-22), EnergyHub (2024-06-12), and Kelvin (2023-10-18), with Voltpost also marked “Series Unknown” on 2024-06-14.
Which stage labels appear most, and where are the highest disclosed amounts outside the top round?
Disclosed rounds include Seed (XL Batteries is “Series Unknown,” but it’s disclosed at $8M; Seed includes CapeZero $3M on 2025-01-23, itselectric $7M on 2024-07-16, and Nuclearis Energy is Seed with an undisclosed amount on 2025-08-01), plus Series A (David Energy $23M on 2024-09-23) and Series B (LO3 Energy $11M on 2021-03-11). The highest disclosed amounts outside the top $65M round are David Energy’s $23M (Series A, 2024-09-23) and BlocPower’s $30M (2022-01-14, Venture - Series Unknown).
Are there clear outliers in disclosed deal size that might be worth follow-up?
Yes: Voltpost’s $100K round on 2024-06-14 is the smallest disclosed amount in the visible rows, sharply below other disclosed figures like itselectric’s $7M (2024-07-16) and XL Batteries’ $8M (2025-08-19). On the upper end, NineDot Energy’s $65M (2025-01-22) dwarfs the rest of the disclosed range.
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