What are the key sales KPIs for the Solar / Energy industry in 2027?
Direct Answer
The nine KPIs that separate a profitable solar installer from a cash-burning one in 2027 are: kW Installed per Month, Cost per Watt ($/W), Cancellation Rate (%), Lead-to-Sit Conversion (%), Sit-to-Close Conversion (%), Average System Size (kW), Battery Attach Rate (%), Cost to Acquire Customer ($/CAC), and Time from Sale to Install (Days).
Together these tell you whether your canvassers are productive, whether your pricing survives interest-rate-driven payment shock, whether NEM 3.0 has cratered your California economics, whether the ITC/IRA tax credit is doing the heavy lifting, and whether your install ops are chewing through deals before the utility ever flips the meter.
Why Solar Sells Differently Than Anything Else
Residential solar lives in a brutal four-way intersection: door-to-door canvassing labor, 18-month interest-rate sensitivity, federal tax credit dependence, and utility/permit timeline risk. None of these exist in SaaS, HVAC, or roofing in the same combined form.
First, the channel mix is heavily canvassing. Sunrun, Momentum, Blue Raven, and Trinity all run dedicated D2D programs because the unit economics of paid digital leads (Google ads at $200-400 per qualified lead for solar in 2027) don't survive a 20% cancellation rate. A canvasser-set appointment costs $80-150 fully loaded.
That gap is why "knock counts" and "doors-per-set" are still board-level KPIs at companies with $1B+ revenue.
Second, solar is sold as a monthly payment, not a sticker price. When the 10-year Treasury moves 100bps, the financed payment on a $35,000 system moves $40-60/month — enough to flip a homeowner from "yes, I'm beating my utility bill" to "this costs more than just paying the utility." 2026's rate cuts helped; the second half of 2027 will be determined by Fed policy more than by sales technique.
Third, the Inflation Reduction Act's 30% Investment Tax Credit is the single largest line item in most solar pitches. Any reporting change, sunset rumor, or eligibility tweak hits close rates within 2-3 weeks. Operators who don't track close-rate-by-week against IRA news cycles fly blind.
Fourth, NEM 3.0 in California (effective since April 2023) cut export rates by roughly 75% and made batteries economically mandatory. Operators who didn't pivot to battery-attached sales lost California revenue by 40-60% from 2023-2025 (per Wood Mackenzie/SEIA US Solar Market Insight).
The same playbook is now coming for any state that adopts net-billing tariffs.
The Nine KPIs, Deep-Dive
1. KW Installed per Month. The only metric that actually generates revenue, ITC dollars, and SREC/RPS credits. Sunrun's 10-K reports system installations and MW deployed quarterly — in 2024 they installed ~900 MW; healthy regional installers run 1.5-4 MW/month. Track by office, by crew, and by sales rep's signed-vs-installed gap.
2. Cost per Watt ($/W). Lawrence Berkeley National Lab's "Tracking the Sun" 2025 edition puts the median residential installed price at $3.28/W; top-quartile installers run $2.70-2.90/W; legacy national integrators run $3.40-3.80/W. Every $0.10/W of cost is roughly $800 of gross margin on a 8 kW system.
3. Cancellation Rate (%). The single most underreported number in solar. Industry average is 20-30% from contract-to-PTO.
Best-in-class is sub-15%. Sunnova has publicly cited cancellation as a headwind in earnings calls. Cancellations cluster around: (a) financing redecision, (b) HOA/spouse pushback, (c) site-survey reveals roof issues, (d) utility delays past 90 days.
4. Lead-to-Sit Conversion (%). D2D benchmark: 8-15% of knocks → sit. Digital lead benchmark: 25-40%. Referral benchmark: 50-70%. If your D2D rate is below 6%, you have a canvassing-script or geo-targeting problem.
5. Sit-to-Close Conversion (%). Industry median is 25-35%. Top performers at Palmetto, Freedom Solar, and Trinity hit 40-50% on one-call closes. Two-call/web-quoted models like EnergySage-sourced leads run lower (20-25%) but with much lower CAC.
6. Average System Size (kW). US residential average is ~8.0 kW in 2026 (SEIA). Battery-attached systems in California now average 10-12 kW because customers oversize to charge the battery. Bigger systems = better ITC absorption + lower $/W.
7. Battery Attach Rate (%). National: 15-25%. California (post-NEM 3.0): 60-80%. Texas and Puerto Rico (resilience-driven): 35-50%. This is your single best leading indicator of NEM-3-era margin survival.
8. Cost to Acquire Customer ($/CAC). Healthy CAC is 12-18% of contract value. On a $35,000 system that's $4,200-6,300. Sunrun has historically run $5,000+ blended CAC; lean regional installers run $2,800-4,000.
9. Time from Sale to Install (Days). Median is 60-90 days; best-in-class is 35-50. Every day past 60 increases cancellation odds by roughly 0.5-1.0 percentage points.
Real Operators and What They Actually Track
Sunrun (RUN): MW deployed, subscriber additions, Net Subscriber Value (NSV), creation cost per watt. Per their 10-K, NSV swung negative in 2023-2024 as rates rose; they restructured to prioritize gross-margin discipline over growth. Tesla Energy: Powerwall attach rate, MW deployed, and the public-facing pricing transparency that anchors the market.
Sunnova (NOVA): Customer additions, weighted average cost of capital — they've taken liquidity hits and their KPIs now lean cash-conversion. SunPower / Maxeon: Post-2024 SunPower bankruptcy, Maxeon is the surviving entity for premium module supply; dealers track Maxeon allocation as a supply KPI.
ADT Solar (now wound down) / Lighthouse: A cautionary tale — bolting solar onto a security distribution model didn't produce the margin discipline solar requires. Trinity Solar: Northeast giant, tracks crew-day throughput obsessively. Momentum Solar: Heavy D2D + paid digital; CAC and sit-rate are the boardroom KPIs.
Palmetto: Software-led model, tracks attach rates on its monitoring/maintenance subscription. Freedom Solar: Texas/Southwest, tracks battery attach and resilience-positioning conversion. Blue Raven Solar: SunPower-acquired then divested; pure D2D playbook — knocks per rep, sets per knock, sits per set.
Failure Modes
- Selling on payment without stress-testing the rate environment. A 75bps rate move kills your pipeline.
- Ignoring cancellation root-cause coding. "Customer changed mind" is not a root cause.
- Letting battery attach drift below 50% in NEM 3.0 states. Customers will hate the post-PTO bill.
- Outrunning install capacity. Sales velocity > install velocity = cancellation explosion.
- Mispricing $/W against LBNL benchmarks. If you're 30%+ above median, you're being shopped on EnergySage.
- Treating ITC like a permanent given. Build a non-ITC P&L scenario.
Reporting Cadence
- Daily: Knocks, sets, sits, signed kW, install completions, PTO count.
- Weekly: Sit-to-close %, cancellation %, $/W trending, battery attach %, CAC by channel.
- Monthly: Full P&L by office, kW backlog aging, install cycle time, LBNL/SEIA benchmark deltas.
- Quarterly: Cohort analysis on cancellation by sale-month, NSV/IRR by vintage, rate-sensitivity scenarios.
30/60/90 for a New RevOps Leader
Days 1-30: Instrument the funnel from knock → PTO in one dashboard. Most installers have 4-6 disconnected systems (Solo, Aurora, Sighten, NetSuite, ServiceTitan). Get a single source of truth for kW signed vs. KW installed vs. KW PTO'd.
Days 31-60: Root-cause-code every cancellation for 60 days. Build a battery-attach playbook for any NEM-3 or net-billing state. Renegotiate at least one financing partner if your dealer fee is above 18%.
Days 61-90: Publish a $/W target by office tied to LBNL median. Stand up a weekly Sales-Ops-Install joint review. Stress-test the P&L against a 100bps rate move and a 50% ITC reduction.
FAQ
Q: What's a good cancellation rate? Sub-15% is best-in-class; 20-25% is typical; 30%+ means a process problem, not a market problem.
Q: How do I model NEM 3.0? Assume 70-75% export-rate compression and require batteries on 70%+ of California deals to maintain payback under 10 years.
Q: Is D2D dead? No — but knock productivity has fallen 15-20% since 2022. The winners pair D2D with paid digital retargeting on knocked addresses.
Q: What's the right CAC? 12-18% of contract value. Above 20% and you're not profitable through a downcycle.
Q: Should I attach storage even outside California? Yes if resilience pitches (TX, FL, PR, NE ice storms) convert. Track attach-rate-by-state monthly.
Sources
- Wood Mackenzie & SEIA — *US Solar Market Insight* (quarterly)
- Lawrence Berkeley National Lab — *Tracking the Sun*, 2025 edition
- Sunrun Inc. — Form 10-K, FY2024
- Sunnova Energy — Form 10-K and quarterly earnings calls
- *Solar Power World* — Top Solar Contractors list, 2025
- *pv magazine USA* — NEM 3.0 attach-rate reporting
- EnergySage — *Solar Marketplace Report*, H2 2025
- California Public Utilities Commission — NEM 3.0 / Net Billing Tariff filings