--- title: "Global Solar Capacity" slug: solar-capacity-additions type: data-index sector: energy canonical_url: https://deepstoryresearch.com/data/solar-capacity-additions series: [cumulative_capacity, annual_additions, country_share] series_count: 3 data_point_count: 9 data_as_of: 2025 source_quality: curated_snapshot tier: free generated_at: 2026-08-11 --- # Global Solar Capacity _The largest installed generating capacity of any kind — and highly concentrated_ > Deepstory Research context file · **Free tier** · > Self-contained AI briefing. Drop into an LLM window or RAG pipeline. ## AI research use contract - Treat this file as source-grounded context, not a live database. Quote `source_ref` and `data_as_of` when using numbers. - Separate `FACT`, `ESTIMATE`, `FORECAST`, `TARGET`, and `INFERENCE`. If a row basis is unclear, say it is unclear. - Prefer T1/T2 sources for hard facts; use T3/T4 sources as context that should be checked before money, legal, medical, operational, or policy decisions. - Keep answer structure clean: first say what the data says, then what you infer, then what would change the conclusion. ## Research upgrade checklist - Check whether a capacity figure is DC or AC before comparing across sources. - Separate cumulative capacity from annual additions; they support different claims. - Note that capacity is not generation — capacity factor varies enormously by geography. - Add a prompt on grid integration and storage, which is where capacity becomes usable energy. ## TL;DR — index summary Cumulative global solar PV capacity went from 1,650 GW in 2023 to about 2,800 GW in 2025 — roughly 70% in two years, making solar the technology with the largest installed generating capacity of any kind. Annual additions rose from 456 GW (2023) to 602 GW (2024), and China accounted for roughly 60% of 2024 additions. ## What this index covers Three series: cumulative capacity, annual additions, and country share of 2024 additions. **Series in this index:** - `cumulative_capacity` — Total installed solar PV capacity worldwide. - `annual_additions` — New solar PV capacity installed each year. - `country_share` — Who installed the 2024 additions. **Entities tracked:** IEA, REN21 (data), China, United States, India. ## Key findings - Cumulative capacity rose from 1,650 GW (2023) to ~2,800 GW (2025) (iea-ger-2026-solar). - Annual additions rose from 456 GW (2023) to 602 GW (2024), +32% (iea-renewables-2025). - Solar was more than 75% of all new renewable capacity built worldwide in 2024 (iea-renewables-2025). - China was ~60% of 2024 additions, against 8% for the US and 5% for India (ren21-gsr-2025). ## Evidence basis map The free tables above show `source_ref` but not the row-level `value_basis`. This section mirrors the visible rows only, so AI tools can separate observed values from estimates, forecasts, targets, and derived values. | series | row | source_ref | value_basis | | --- | --- | --- | --- | | cumulative_capacity | year=2023; gw=1650 | iea-renewables-2025 | Cumulative global solar PV capacity 1.65 TW at end-2023 | | cumulative_capacity | year=2024; gw=2250 | iea-renewables-2025 | Cumulative global solar PV capacity 2.25 TW at end-2024 | | cumulative_capacity | year=2025; gw=2800 | iea-ger-2026-solar | Cumulative solar PV capacity ~2,800 GW at end-2025 — largest installed capacity of any generating technology | | annual_additions | year=2023; gw=456 | iea-renewables-2025 | 456 GW of solar PV added in 2023 | | annual_additions | year=2024; gw=602 | iea-renewables-2025 | 602 GW of solar PV added in 2024, +32% YoY — an all-time high | | country_share | country=China; pct=60 | ren21-gsr-2025 | China ~60% of new global solar PV additions, 2024 | | country_share | country=United States; pct=8 | ren21-gsr-2025 | United States 8% of new global solar PV additions, 2024 | | country_share | country=India; pct=5 | ren21-gsr-2025 | India 5% of new global solar PV additions, 2024 | | country_share | country=Rest of world; pct=27 | ren21-gsr-2025 | Residual to 100% after China 60%, US 8%, India 5% — DERIVED, shown so the donut sums correctly | ## The series (per-chart briefings) ### Cumulative capacity — line **Direct answer:** Total installed solar PV capacity worldwide. **Time bracket:** annual | year | gw | source_ref | | --- | --- | --- | | 2023 | 1650 | iea-renewables-2025 | | 2024 | 2250 | iea-renewables-2025 | | 2025 | 2800 | iea-ger-2026-solar | **Read:** Now the largest installed generating capacity of any technology. ### Annual additions — bar **Direct answer:** New solar PV capacity installed each year. **Time bracket:** annual | year | gw | source_ref | | --- | --- | --- | | 2023 | 456 | iea-renewables-2025 | | 2024 | 602 | iea-renewables-2025 | **Read:** Solar was over 75% of all new renewable capacity in 2024. **Caveat:** Published 2024 additions disagree (553 GW vs 602 GW) because sources mix DC and AC basis. The cumulative series is internally consistent and is the primary chart. ### Country share — donut **Direct answer:** Who installed the 2024 additions. **Time bracket:** 2024 | country | pct | source_ref | | --- | --- | --- | | China | 60 | ren21-gsr-2025 | | United States | 8 | ren21-gsr-2025 | | India | 5 | ren21-gsr-2025 | | Rest of world | 27 | ren21-gsr-2025 | **Read:** Far more concentrated than global totals suggest. ## Cross-series synthesis — why this matters The cumulative chart says solar has won on capacity; the country_share chart says one country did most of the winning. A 60% share of additions means global deployment forecasts are, in large part, forecasts of Chinese industrial policy and domestic demand. The "rest of world" slice is the underrated one: it covers thirty countries that each installed more than 1 GW, almost twice as many as in 2020. Breadth is increasing even as concentration stays high. Read against battery-pack-prices: the same Chinese manufacturing overcapacity that pushed pack prices to $84/kWh underlies the module economics driving these additions, and storage is what converts this capacity into dispatchable energy. ## Entities & relationships | Entity | What they do | Key stat | Relationship | | --- | --- | --- | --- | | China | Dominant installer and manufacturer | ~60% of 2024 additions | Also the battery cost leader | | IEA | Data authority | Renewables and Global Energy Review | Primary source for the capacity series | ## Timeline of key events & decisions - **2023** — 1,650 GW cumulative; 456 GW added → the baseline - **2024** — 602 GW added; >75% of all new renewable capacity → the peak addition year in the series - **2025** — ~2,800 GW cumulative → ~70% growth in two years ## Cross-industry ripple - **Electricity grids:** Capacity growth outpacing grid and storage build creates curtailment and negative-price hours. _(inference)_ - **Data centres:** Solar is a primary supply-side answer to the load growth in ai-power-demand, but only with storage. _(inference)_ - **Trade policy:** Manufacturing concentration makes module supply a trade-policy variable, as with batteries. _(inference)_ ## Non-obvious reads (interpretation) _This section is interpretation, not sourced fact — each item names the observation it is built on and a confidence level._ - **Observation:** Two credible sources publish 553 GW and 602 GW for the same year. **Read:** The DC/AC basis problem means solar capacity comparisons across publications are frequently invalid without a stated basis, and headline "record additions" claims should be checked for which convention they use before being compared year to year. _(confidence: high)_ ## Glossary / key terms - **DC vs AC capacity** — Module-side (DC) versus inverter/grid-side (AC) rating. DC figures are higher; mixing them invalidates comparison. - **GW** — Gigawatt — a measure of capacity, not of energy delivered. - **Capacity factor** — Actual output as a share of theoretical maximum. For solar it varies widely by location. ## How to use this with AI Paste this file into an LLM context window (or a RAG store) and ask cross-series questions. The tables carry a `source_ref` per row; the source registry below maps each ref to a named source and a trust tier. ### Suggested prompts (multi-series) ```text Using cumulative_capacity and country_share, assess how dependent global solar forecasts are on one country. ``` ```text Explain why the annual_additions chart carries a DC/AC caveat and what it means for comparing against another publication. ``` ## Sources & trust | ref | source | trust tier | url | | --- | --- | --- | --- | | iea-ger-2026-solar | IEA — Global Energy Review 2026: Solar PV and wind | T3 · Reputable press / research org / OWID | https://www.iea.org/reports/global-energy-review-2026/technology-solar-pv-and-wind | | iea-renewables-2025 | IEA — Renewables 2025: Renewable electricity | T3 · Reputable press / research org / OWID | https://www.iea.org/reports/renewables-2025/renewable-electricity | | ren21-gsr-2025 | REN21 — Global Status Report 2025: Solar PV | T3 · Reputable press / research org / OWID | https://www.ren21.net/gsr-2025/technologies/solar-pv/ | ## Caveats & what this index cannot answer - Generation, as distinct from capacity. - Curtailment, storage pairing, or grid constraints. - Module prices or project economics. - Estimates and forward targets are labelled in the working dataset; never read a labelled estimate or forecast as a settled figure. - This is an observational data index, not investment, legal, or medical advice. ## Data freshness & methodology - **Last updated:** 2026-08-11 - **Data as of:** 2025 - **What changed most recently:** Cumulative capacity reached about 2,800 GW in 2025, roughly 70% above 2023. **Methodology (as seeded):** > IMPORTANT — published solar figures disagree, and the reason is > technical rather than editorial. Capacity can be stated on a DC basis > (the panels’ rated output) or an AC basis (what the inverters can > deliver to the grid). DC figures run materially higher. Sources rarely > label which they use. > > That is why 2025 annual additions are OMITTED here. One IEA-derived > source gives 553 GW for 2024 against the 602 GW seeded above, and > another describes 2025 as "surpassing 600 GW for the first time" — > which cannot be reconciled with 602 GW already added in 2024. Rather > than choose, the annual-additions chart carries only the one > internally consistent source pair (2023 and 2024). > > The cumulative series is internally consistent across its sources and > is the more reliable chart on this page. > > The "Rest of world" slice on the country donut is DERIVED as the > residual to 100% after China, the US and India, so the chart sums > correctly. It is labelled as such in its value_basis. > > Re-verified 2026-08-10. --- _Free tier. The full row-level dataset and per-source detail live on the live page and in the working file. Canonical: . Deepstory Research · https://deepstoryresearch.com_