New startup ideas · Physical world · Climate and energy
startup idea
Cellyard
Graded second-life battery packs with warranties, sold to small installers and site owners.
Cellyard runs regional depots that take retired EV and fleet packs, run a short partial-cycle test, and use an ML state-of-health model to grade each pack into a published tier with a warranted capacity and cycle life.
- Marketplace
- Small business
- $100B+ market
- Platform others build on
- US first
3/5
venture judge
1
similar startups, last 2 years (2 all-time)
96%
of 4 nearest real companies still alive
yes
3 matching federal grants and programs
Direction supported by government programs and grants
Scorecard
One score that balances how trendy the idea is, the demand for it and its potential for 100x, with competition measured relative to every other idea in the catalog. Recent startup trends first, government priorities second.
66
Idea Score, 0-100 · raw 39.9 x 1.64
Warm
competition: more crowded than 20% of ideas · headwind x0.90
+1.5
government priorities, secondary (3 matching grants)
Trend
53
Is the wave forming now? 2025-26 entrants vs 2023-24, rounds since 2025, the sector's live-batch direction, the 2026 trend analyst.
- Entrants 2025-26 vs 2023-24 (similar companies)70
- Rounds announced 2025+ in the sector68
- Sector direction (live batch)50
- 2026 trend analyst25
Demand
22
Does anyone want it? YC's current RFS, companies already paid for something similar, the operator judge, founders' yes-rate in decks, readers who would run the test.
- YC asks for it (current RFS: idea / sector)0
- Someone already pays (similar companies, recent / all-time)17
- Operator judge: real pain50
100x potential
66
Can it return a fund? The venture judge (double weight), market-size and moat axes, neighbours still alive, the technologist judge.
- Venture judge50
- Market size axis100
- Moat axis80
- Technologist judge50
Score = 100 x cbrt(Trend x Demand x 100x) x (1 - 0.5 x crowding) + government bonus (max 5), calibrated so the 95th-percentile idea scores 90 (order never changes). A geometric mean: a weak pillar cannot be papered over. Percentiles are among the 272 ideas in the catalog; the terms matched were graded, second-life, battery, packs, warranties, sold, installers, regional.
The idea in full
- What
- Cellyard runs regional depots that take retired EV and fleet packs, run a short partial-cycle test, and use an ML state-of-health model to grade each pack into a published tier with a warranted capacity and cycle life. Graded packs are listed on a marketplace where small commercial sites, EV charging hosts, contractors and small colo operators buy through their installer, at a fraction of new-cell prices. The grading spec and a standard DC bus plus telemetry API are open, so inverter makers, installers and lenders build against them, and lenders can underwrite residual value from Cellyard telemetry rather than a guess.
- Why now
- Voxel Energy (yc W26) is building energy independent data centers on solar and repurposed batteries and AraBat is in the Techstars 2026 class recycling lithium batteries, so both the demand for reused packs and the shredding alternative are being funded right now, but the radar shows nobody grading and warranting packs in between; 42 companies entered this cluster in the last two years, few of them on the supply side.
- Wedge: first customer and entry point
- One depot in Southern California buying packs from a single delivery fleet's retirements and selling graded 30-100kWh blocks to twenty local solar installers who already have commercial customers asking for storage.
- Path to 100x
- Stationary storage is a $100B+ market and small commercial buyers are priced out of it, so a trusted grade plus a warranty is the missing unit of trade; whoever publishes the grade that lenders and inverter makers build against sets the standard others plug into. Locking exclusive intake from fleets, dismantlers and OEM take-back programs is the distribution moat, because supply, not demand, is the constraint for the first five years.
- Ceiling
- Holding graded inventory on the balance sheet gives distributor margins and distributor multiples, not platform economics, unless the grading standard is adopted by parties who never buy from Cellyard.
- Closest real companies, as the generator saw them
- Voxel Energy consumes repurposed batteries inside its own data center projects; Cellyard sells graded packs to everyone including such builders. AraBat shreds packs for materials, which is the exit path for the tiers Cellyard rejects, and Sili Energy makes new cell materials rather than reusing existing ones.
- Main risk
- New LFP cell prices keep falling until a warranted second-life pack is no cheaper than a new one, and the depot inventory becomes scrap.
Five judges
Each judge scores every idea in the catalog with a named rubric; the venture judge decides whether a card is shown at all (4-5 is venture-grade).
Venture investor
3/5
Publishing the grade lenders underwrite against could become a standard, but holding depot inventory earns distributor margins as the card admits.
Bootstrapper
2/5
Regional depots holding graded pack inventory give distributor margins and heavy working capital, though installer buyers pay faster than homeowners.
Operator
3/5
Installers buy packs today and a warranted grade is a real unit of trade, but the value proposition dies the moment new LFP prices cross the used discount.
Technologist
3/5
The state-of-health model is real, but publishing the grading spec and DC bus openly gives away the only defensible technical asset.
Risk
3/5
Intake from a single delivery fleet's retirements plus warranted second-life capacity on the balance sheet is supply and liability concentration.
trends
2/5
Second-life pack grading was viable in 2023 and the card admits falling LFP prices close the window rather than open it.
Similar startups in the directory
Companies whose pitch matches most of the idea's terms (graded, second-life, battery, packs, warranties, sold, installers, regional): 2 all-time, 1 from the last two years. Same matching as Idea Check.
Custom Aerospace-Grade Battery Packs
Designs, builds and supports next-gen motorcycles for Southeast Asia.
The generator's reference companies
Real companies the model named as closest when it wrote the card, with their fate. A check mark is a company the radar could verify in its directory.
Public money in this direction
US federal grants, SBIR/STTR awards and open opportunities from the radar's public-money feed, matched to the idea's terms; the sector totals give the context.
3
grants and programs matching the idea
180
startup-relevant grants in Climate and energy
$155M
awarded in the sector, tracked
19
opportunities open now in the sector
- I-Corps: Translation Potential of a Remote Monitor and Alert System for Early Detection of Battery Failureawardhigh relevance
National Science Foundation · I-Corps · $50K · posted 2026-07-30
- I-Corps: Translation Potential of a Battery Monitoring and Degradation Detection Tool Using Non-Contact Methodsawardhigh relevance
National Science Foundation · I-Corps · $50K · posted 2026-07-29
- I-Corps: Translation Potential of Battery-Free, Cable-Free Embedded Sensing for Civil Infrastructure Monitoringawardhigh relevance
National Science Foundation · I-Corps · $50K · posted 2026-07-17
Market signal
What the radar sees in Climate and energy: new companies by cohort year, the forming YC batch, and outcomes since the February snapshot.
Climate and energy · 92 → 112 → 184 → 97 → 32 new companies 2022 → 2026 · 91% aliveYC S26: 2 in this cluster, 1% of the batch (was 1% in X26) (F26 is still forming: 21 listed)Since February, of 118 YC companies here: 0 acquired, 2 shut down, 4 rewrote their pitch
Design attributes
The card is one cell of a designed set: every axis below was chosen before the text was written, and the text had to realize it.
- Buyer
- Small business
- Business model
- Marketplace
- Path to 100x
- Platform others build on
- Market size
- $100B+ market
- Capital intensity
- Capital-heavy (hardware, bio, infra)
- Speed to revenue
- Revenue in 1-3 years
- Technical depth
- Deep tech: ML, hardware, bio
- Go-to-market
- Founder-led sales
- Moat
- Distribution moat
- Geography
- US first
- Regulation
- Some regulation
- Vibe
- Hot space
Listed under
An idea sits in its own sector and in any sector its text clearly touches.
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Fictional company written 2026-08-22 from MarkosWeb data; the companies, grants and numbers around it are real and tracked. Treat the idea as a research prompt, not a plan.