Solar PV capped materially less than 100% efficiency by physics
Predictor: Alex Wissner-Gross · ep#247 "Elon Musk vs. Sam Altman, AI Job Loss, and OpenAI's $852B Valuation EP #247" · source
Prediction text
Solar PV capped materially less than 100% efficiency by physics | you're not going to get more than 100% efficiency. In fact, there are physical reasons to think that the the the cap on electricity generation from solar PV is capped at materially less than 100%.
Verbatim quote
you're not going to get more than 100% efficiency. In fact, there are physical reasons to think that the the the cap on electricity generation from solar PV is capped at materially less than 100%.
Predictor: Alex Wissner-Gross
Calibration plot (stated vs observed)
Evidence about this node from Alex Wissner-Gross is multiplied by κ in /api/intake. Lower κ = less weight; floors at 0.10 (effectively silenced) and caps at 1.00 (full weight).
Reference class
This node isn't linked to a reference class. The Bayesian update applies without outside-view blending.
Probability over time
Milestone chain
- 2025-04-30hitLONGi sets perovskite-silicon tandem efficiency record at ~35% (>SQ limit)How: LONGi reports certified perovskite-silicon tandem solar cell efficiency of ~34.85% (April 2025), then ~35.0% on 1cm² device, exceeding the Shockley-Queisser single-junction limit of ~33.16%Source: https://www.fluxim.com/research-blogs/perovskite-silicon-tandem-pv-record-updatesconf 99%Notes: HIT (negative for prediction direction) — tandem cells already broke single-junction SQ limit in 2025. Prediction's 'capped materially less than 100%' is correct in absolute terms but already hedged by tandem topology.
- 2026-06-01 → 2027-12-31pendingIndustrial-grade perovskite/silicon tandem deployed at >100MW commercial scaleHow: Industry tracker (BloombergNEF / Wood Mackenzie) confirms ≥100MW of commercial PV deployment using certified perovskite/silicon tandem modulesSource: https://advanced.onlinelibrary.wiley.com/doi/10.1002/aenm.202504478 — Tandem Takeoff industrial-grade tandem 2026 reviewconf 65%Notes: Tests whether the lab record translates to commercial scale, which determines whether the 'physics-capped' framing matters in practice.
- 2026-04-30 → 2028-12-31pendingTriple-junction perovskite cell exceeds 36% lab efficiencyHow: NREL Best Research-Cell Efficiency Chart adds an entry for triple-junction perovskite at >36% certifiedSource: NREL Best Research-Cell Efficiency Chartconf 55%Notes: Three-junction architecture pushes further past single-junction SQ; tests prediction's claim that physics caps efficiency 'materially less than 100%'.
- 2027-01-01 → 2029-11-30pendingSolar PV LCOE remains decoupled from cell-efficiency ceilingHow: IEA / IRENA report shows utility-scale solar LCOE continues to decline >5%/yr despite efficiency gains being asymptotic, validating that the cap is real but cost decoupling still occursSource: IEA Renewables / IRENA Renewable Cost annual reportsconf 55%Notes: Cascade — confirms prediction's underlying message (efficiency is capped, but economics isn't only about efficiency).
What if this resolves?
Click a button to clamp this prediction and run a Gibbs sample. Returns the predictions whose marginals shift most. ~30s per run; ideal for stress-testing "if X resolves, what else moves?"
Evidence chain
Network propagation neighbors
Top incoming (parents)
Edges that influence THIS node's belief
| Kind | Node | Their prob | P(c|s=T) | P(c|s=F) | Δ implied |
|---|---|---|---|---|---|
| prereq | S_GRID_50GW_2029 50GW grid expansion by Dec 2029 | 50.0% | 0.550 | 0.050 | -0.147 |
| killer | TK03 AI Regulatory Moratorium (EU/US Capability Freeze) | 10.0% | 0.050 | 0.550 | +0.053 |
| prereq | SEM_042 2025 will be the definitive year that agentic systems finall — Kevin Weil | 73.8% | 0.550 | 0.050 | -0.033 |
| prereq | 235_038 David Sinclair begins partial epigenetic reprogramming trial — Peter Diamandis | 74.0% | 0.550 | 0.050 | -0.030 |
| killer | TK01 AGI Capability Plateau (2026-27 Training Stall) | 15.0% | 0.050 | 0.550 | +0.028 |
Top outgoing (children)
Predictions THIS node influences
| Kind | Node | Their prob | P(c|s=T) | P(c|s=F) | Δ implied |
|---|---|---|---|---|---|
| prereq | 246_016 Dragonfly nuclear-powered octicopter arrives at Titan in 203 — Peter Diamandis | 35.6% | 0.650 | 0.050 | -0.044 |
| prereq | 235_030 Ray Kurzweil predicts Longevity Escape Velocity (LEV) by 203 — Ray Kurzweil | 39.2% | 0.750 | 0.050 | -0.036 |
| prereq | 240_036 TEPCO's restarted reactor will support 20% of Japan's electr — Peter Diamandis | 34.3% | 0.650 | 0.050 | -0.030 |
| prereq | 239_008 Moon base will exist in 10 years — Elon Musk | 28.8% | 0.550 | 0.050 | -0.019 |
| prereq | SEM_034 True artificial general intelligence will be achieved betwee — Demis Hassabis | 28.7% | 0.550 | 0.050 | -0.018 |
Ticker exposure
Beneficiaries (23)
Adverse (6)
Prerequisites (9)
| Type | Pred | Title | Domain | Lag |
|---|---|---|---|---|
| prereq | 235_038 | David Sinclair begins partial epigenetic reprogramming trials with Life Biosciences in March 2026. | Biotech/Longevity | — |
| prereq | SEM_008 | Training runs costing $10 billion for a single model will commence sometime in 2025. | AI | — |
| prereq | 238_009 | Recursive self-improvement is already happening now (no longer three years out) | AI | — |
| prereq | SEM_012 | Nvidia quadrupled chip production output while only doubling human headcount — achieved by deploying AI coding tools (Cursor, Claude Code) across engineering. | AI/Manufacturing | — |
| prereq | SEM_042 | 2025 will be the definitive year that agentic systems finally hit the mainstream. | AI/Agents | — |
| prereq | S_GRID_50GW_2029 | 50GW grid expansion by Dec 2029 | energy_grid_expansion | — |
| killer | TK14 | Superbubble Pop (S&P 500 -40%, Moonshot Capital Evaporates) | — | — |
| killer | TK01 | AGI Capability Plateau (2026-27 Training Stall) | — | — |
| killer | TK03 | AI Regulatory Moratorium (EU/US Capability Freeze) | — | — |
Dependents (5)
| Type | Pred | Title | Domain | Lag |
|---|---|---|---|---|
| prereq | 235_030 | Ray Kurzweil predicts Longevity Escape Velocity (LEV) by 2033. | Biotech/Longevity | — |
| prereq | 246_016 | Dragonfly nuclear-powered octicopter arrives at Titan in 2034. | Space | — |
| prereq | 240_036 | TEPCO's restarted reactor will support 20% of Japan's electric needs by 2040 | Energy | — |
| prereq | SEM_034 | True artificial general intelligence will be achieved between 2032 and 2042 — 'first we solve AI, then use AI to solve everything else'. | AI/AGI | — |
| prereq | 239_008 | Moon base will exist in 10 years | Space | — |
Expected milestones (1)
| Expected by | Description | Status |
|---|---|---|
| 2031-03-31 | [Energy/Regulation 2031-03] [247_049] Solar PV capped materially less than 100% efficiency by physics [231_034] Power constraint won't be a big problem until chip fabs come online and it sudde [241_059] Government will continue unleashin | pending |
Raw metadata
{
"nia": false,
"qty": "<100% efficiency",
"url": "https://www.youtube.com/watch?v=5ak26W2YNRY",
"mode": "THESIS",
"role": "Host",
"context": "the cap on electricity generation from solar PV is capped at materially less than 100%",
"verbatim": "you're not going to get more than 100% efficiency. In fact, there are physical reasons to think that the the the cap on electricity generation from solar PV is capped at materially less than 100%.",
"conv_cues": "physical reasons",
"direction": "NOT_HAPPEN",
"timeframe": "Permanent",
"conv_level": "HIGH",
"milestones": [
{
"kind": "llm_pre_event",
"label": "LONGi sets perovskite-silicon tandem efficiency record at ~35% (>SQ limit)",
"notes": "HIT (negative for prediction direction) — tandem cells already broke single-junction SQ limit in 2025. Prediction's 'capped materially less than 100%' is correct in absolute terms but already hedged by tandem topology.",
"source": "https://www.fluxim.com/research-blogs/perovskite-silicon-tandem-pv-record-updates",
"status": "hit",
"weight": 0.4,
"ordinal": -9,
"source_id": null,
"confidence": 0.99,
"source_url": "https://www.fluxim.com/research-blogs/perovskite-silicon-tandem-pv-record-updates",
"expected_date": "2025-04-30",
"observed_date": "2025-04-30",
"research_origin": "deep_research",
"measurement_criterion": "LONGi reports certified perovskite-silicon tandem solar cell efficiency of ~34.85% (April 2025), then ~35.0% on 1cm² device, exceeding the Shockley-Queisser single-junction limit of ~33.16%"
},
{
"kind": "prereq",
"label": "Nvidia quadrupled chip production output while only doubling human headcount — achieved by deploying AI coding tools (Cursor, Claude Code) a",
"status": "hit",
"weight": 0.5,
"ordinal": -8,
"source_id": "SEM_012",
"expected_date": "2026-04-29",
"observed_date": "2026-04-29"
},
{
"kind": "prereq",
"label": "Training runs costing $10 billion for a single model will commence sometime in 2025.",
"status": "hit",
"weight": 0.5,
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"expected_date": "2026-04-29",
"observed_date": "2026-04-29"
},
{
"kind": "prereq",
"label": "2025 will be the definitive year that agentic systems finally hit the mainstream.",
"status": "hit",
"weight": 0.5,
"ordinal": -6,
"source_id": "SEM_042",
"expected_date": "2026-04-29",
"observed_date": "2026-04-29"
},
{
"kind": "prereq",
"label": "Recursive self-improvement is already happening now (no longer three years out)",
"status": "hit",
"weight": 0.5,
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"source_id": "238_009",
"expected_date": "2026-04-29",
"observed_date": "2026-04-29"
},
{
"kind": "prereq",
"label": "David Sinclair begins partial epigenetic reprogramming trials with Life Biosciences in March 2026.",
"status": "hit",
"weight": 0.5,
"ordinal": -4,
"source_id": "235_038",
"expected_date": "2026-04-29",
"observed_date": "2026-04-29"
},
{
"kind": "llm_pre_event",
"label": "Industrial-grade perovskite/silicon tandem deployed at >100MW commercial scale",
"notes": "Tests whether the lab record translates to commercial scale, which determines whether the 'physics-capped' framing matters in practice.",
"source": "https://advanced.onlinelibrary.wiley.com/doi/10.1002/aenm.202504478 — Tandem Takeoff industrial-grade tandem 2026 review",
"status": "pending",
"weight": 0.4,
"ordinal": -3,
"source_id": null,
"confidence": 0.65,
"source_url": "https://advanced.onlinelibrary.wiley.com/doi/10.1002/aenm.202504478",
"expected_date": "2027-03-17",
"research_origin": "deep_research",
"expected_date_range": {
"to": "2027-12
... (truncated)