Building a climate-tech business

Software startups go from idea to MVP in months with $50-200k. Climate startups (especially hardware) go from idea to first paying customer in 3-7 years with $5-100M. This isn't slowness — it's the cost of physical reality.

Phases (rough budget):

• Lab proof-of-concept ($500k-$5M, 18-36 months): prove the science works at small scale. Grant funding + university partnerships do most of this work.
• Pilot scale ($5M-$50M, 12-24 months): build the first commercial-grade unit at 1/100 of full scale. First paying customers start here, but unit economics are awful.
• First commercial deployment ($20M-$200M, 12-24 months): build at full commercial scale with one or two anchor customers. Likely loss-making.
• Scale ($50M-$1B+, 3-5+ years): build multiple units, drive down costs via volume + learning curves. Profitability typically at this stage.

The Wright's Law trap: founders model cost reductions assuming each doubling of cumulative production drops cost by 20-25%. Sometimes this works (solar, batteries). Sometimes it doesn't (carbon capture, nuclear). Don't pitch a learning curve you can't justify with comparable cases.

Pure-software climate (carbon accounting, energy management, climate data) is a different shape — looks like normal SaaS but with mission-driven buyers. Plansparency, Watershed, Persefoni are SaaS-shaped. Form Energy, Commonwealth Fusion are hardware-shaped. Your category determines your capital plan.

Climate-tech VCs alone can't fund a hardware company to scale; grants fill the gap.

US sources:

• DOE (Department of Energy) — ARPA-E ($1M-$10M for early-stage R&D), Loan Programs Office (up to $multi-billion debt for late-stage), DOE Office of Clean Energy Demonstrations
• IRA tax credits — investment tax credits, production tax credits, EV credits. Material upside on unit economics for qualifying technologies
• DARPA / DoD — dual-use climate (energy security, climate adaptation)
• NSF SBIR / STTR — $250k-$1.5M for early-stage research

EU sources:

• EU Innovation Fund — €40-€100M+ for first-of-kind commercial deployments
• Horizon Europe — €2-€10M for collaborative R&D
• EIB / EIC — debt and equity for scale-ups

Philanthropic capital:

• Breakthrough Energy Ventures (Gates) — equity investor, deep ecosystem
• Lowercarbon Capital / Energy Impact Partners — equity, climate-specialist VCs
• Bezos Earth Fund — primarily grants, focused on Earth-systems

Application reality: grant applications take 3-6 months to prepare (technical, financial, regulatory). Win rates are 5-20%. Most climate startups hire a part-time grant writer or work with specialists ($20-50k per major application).

Grant strategy: layer non-dilutive grants on top of equity rounds. A typical Series A climate startup might have $20M equity + $5M government grants + $3M philanthropic grants stacked over 18 months.

Procurement paths:

• Corporate procurement — Fortune 500 companies buying decarbonisation as part of their commitments. Sales cycles 12-24 months. Deal sizes $500k-$10M+. The fastest path to revenue if you fit a corporate need.
• Utility procurement — investor-owned utilities and public power. Multi-year cycles, RFP-driven, regulated by state PUCs. Worth it for utility-scale tech; brutal for software.
• Government procurement — federal, state, municipal. Buy American + Davis-Bacon labour rules add complexity. Long cycles + price-sensitive but volume-large.
• Direct-to-consumer — heat pumps, EVs, home solar. Works when you have a strong installer network and consumer financing. Rivian and Sunrun both built consumer plays at scale.

Carbon accounting and MRV (Measurement, Reporting, Verification): even non-carbon climate companies need this. Scope 1 (direct emissions), Scope 2 (purchased energy), Scope 3 (value chain). B2B customers will increasingly ask for your product's emissions impact + your operational emissions footprint. Tools like Watershed, Persefoni, Sweep can handle the reporting; you need the data flowing into them.

Climate VC ecosystem (rough):

• Generalist VCs with climate-curious partners — Sequoia, Andreessen, GV. Decent for SaaS-shaped climate.
• Climate-specialist funds — Lowercarbon, Energy Impact Partners, Congruent, Prelude, Voyager. Best for hardware/deep tech climate.
• Corporate VCs — Shell Ventures, BP Ventures, Microsoft Climate Innovation Fund. Strategic capital with potential for procurement partnerships.
• Government / philanthropy — Breakthrough Energy, BlocPower's NYSERDA partners, Bill & Melinda Gates Foundation.

A typical hardware climate Series A involves 3-5 funds + 1-2 strategics + 1 grant. Pitching only software-VCs limits the round.