In 2026, the world added more solar power in a single year than ever before. Not more than most years — more than any year on record. That’s the kind of number worth pausing on, because it says something about where energy is actually heading, not where people predict it’s heading.
Here’s the number: roughly 510 GW of new solar capacity went up worldwide in 2025 alone. To put that in perspective, that’s more new solar capacity added in twelve months than most countries have built in their entire history of using electricity.
This piece breaks down what the 2025 data actually shows — global capacity, who’s leading, why costs keep falling, and what a residential solar payback period looks like right now. And because this is written for readers thinking about solar in a market like Bangladesh, we’ll also look honestly at where these global numbers apply locally, and where they simply don’t.
How Much Solar Capacity Exists Globally Right Now?
By the end of 2025, global installed solar capacity reached somewhere around 2,392 GW — though you’ll also see the figure reported as 2,383 GW, depending on which market-tracking body is doing the counting. That small gap isn’t a contradiction; it just reflects differences in how various organizations tally installations across countries and reporting periods. Either way, the headline hasn’t changed: global solar capacity crossed well past the 2,300 GW mark.
It’s worth pausing on what “capacity” actually means here, because it’s the single most misunderstood term in solar reporting.
Capacity (measured in GW) is the maximum amount of power a solar system could produce under ideal sunlight conditions. Generation (measured in TWh) is how much electricity it actually produced over a period of time — which is always lower than theoretical capacity, because the sun doesn’t shine at full strength 24 hours a day.
In 2025, all that installed solar capacity generated approximately 2,800 TWh of electricity worldwide — around 8% of total global electricity generation. That’s a meaningful share for a technology that, twenty years ago, barely registered as a rounding error on the world’s energy balance sheet.
Quick snapshot of 2025’s global solar numbers:
| Metric | 2025 Figure |
| Total global installed capacity | ~2,392 GW (2,383 GW per some reporting) |
| New capacity added in 2025 | 510 GW (largest annual addition on record) |
| Global electricity generated by solar | ~2,800 TWh (~8% of world total) |
| Solar’s share of new renewable capacity | ~74% |
Who’s Actually Building All This Solar?
China isn’t just leading the global solar race — it’s not close. The country accounts for roughly 1,202 GW of installed solar capacity, which works out to more than half of everything installed on the planet.
That kind of dominance matters beyond bragging rights. China’s scale of manufacturing is a big part of why solar panel prices have fallen so dramatically worldwide — including in import-dependent markets like Bangladesh, where the vast majority of PV modules and inverters are sourced from Chinese manufacturers. When Chinese production scales up, the ripple effect on component pricing reaches markets thousands of kilometers away.
What Happened in the US Solar Market in 2025?
The United States had its own record year. Solar accounted for 43.2 GW of new capacity in 2025 — that’s 54% of all new electricity-generating capacity added in the country that year, across every energy source combined. Solar wasn’t just growing; it was the single largest contributor to new US power generation, full stop.
Add battery storage into the picture, and the number gets even more striking: solar plus storage together made up 79% of all new US power capacity in 2025.
That pairing matters. Solar alone only generates electricity when the sun is out. Storage is what lets that electricity be used later — in the evening, during a cloudy stretch, or whenever demand actually peaks. A market where solar-plus-storage dominates new capacity additions is a market that’s solving solar’s biggest limitation, not just adding panels for the sake of it.
Looking ahead, the US is forecast to add a record 43.4 GW of utility-scale solar in 2026. Worth flagging clearly: that’s a projection, not a confirmed outcome — forecasts like this can shift with policy changes, supply chain conditions, or financing costs. But directionally, it suggests 2025 wasn’t a one-off spike.
Why Does Solar Keep Getting Cheaper?
This is probably the most consequential trend in the entire dataset, and it’s easy to walk past a number like “90% cost reduction since 2010” without registering what it actually means.
The cheapest solar projects being built today — mostly large utility-scale installations in China and India — are now landing in the $0.033 to $0.038 per kWh range. That’s the reported cost for specific, competitively bid utility-scale projects, not a universal global average, and it shouldn’t be read as “solar costs this much everywhere.” But it does represent roughly a 90% drop in solar generation costs compared to 2010.
What’s driving it? A few things, stacked on top of each other:
- Manufacturing scale — as China’s solar manufacturing capacity grew, per-unit production costs fell sharply
- Falling polysilicon and raw material costs as supply chains matured
- Technology efficiency gains — modern panels convert more sunlight into electricity per square meter than older generations
- Competitive project bidding in utility-scale markets, which pushes developers to squeeze out every possible cost saving
This is the mechanism that indirectly benefits a market like Bangladesh, even without a single utility-scale project being built domestically. Cheaper global manufacturing means cheaper imported panels — which is one of the real, defensible reasons rooftop solar has become more financially realistic for homeowners and businesses here over the past several years.
What Does Residential Solar Actually Cost — and Pay Back?
The utility-scale numbers above are impressive, but they don’t tell homeowners much about their own situation. For that, the residential data point is more useful.
In the US market, the median marketplace price for residential solar in Q4 2025 was $2.49 per watt, for an average system size of 11.8 kW. The simple payback period — how long it takes for energy savings to cover the upfront cost — extended to 10.4 years.
Two things worth noting here, because they cut against the “solar just keeps getting more affordable” narrative:
First, this is a US residential figure. It reflects US equipment pricing, labour costs, electricity rates, and financing conditions — none of which map directly onto Bangladesh’s market, where system costs, grid electricity pricing, and net metering rules are structured very differently.
Second, and more interesting: even as utility-scale solar costs keep falling, residential payback periods in this market actually lengthened rather than shortened. That’s a nuance most “solar is booming” articles skip entirely. Utility-scale economics and residential economics don’t move in lockstep — they’re shaped by different cost structures, different scale efficiencies, and different local market forces.
Solar vs. Wind: Which Is Actually Winning?
If you’re trying to gauge where renewable investment is really flowing, the solar-versus-wind comparison tells a clear story.
| 2025 Global Additions | |
| Solar | 510 GW |
| Wind | 159 GW |
Solar additions outpaced wind by more than 3-to-1 in 2025, accounting for around 74% of all new renewable capacity added worldwide. Solar isn’t just growing — it’s growing far faster than any other renewable technology, largely because panel costs have fallen further and faster than wind turbine costs, and because solar projects (particularly rooftop and smaller-scale ones) can be deployed faster than most wind installations.
What Does This Mean for a Market Like Bangladesh?
Here’s where it’s worth being honest rather than forcing a connection that isn’t really there.
Bangladesh isn’t building utility-scale gigawatt-plus solar farms the way China, the US, or India are, and comparing local capacity directly to those numbers wouldn’t be useful or accurate. Bangladesh’s solar story has largely unfolded through rooftop installations, net-metering-connected systems, and off-grid or hybrid setups — a genuinely different stage of the same global shift, shaped by different infrastructure realities: grid reliability concerns, land availability, and import dependency for equipment.
What does carry over, indirectly, are the underlying cost dynamics. As Chinese and Indian manufacturing keeps driving global panel prices down, that trend flows into Bangladesh through cheaper imported modules and inverters — even though the country isn’t part of the utility-scale build-out generating those headline GW figures. Similarly, as battery storage technology matures and gets cheaper globally (part of what’s driving the 79% solar-plus-storage figure in the US), that same maturing technology becomes more accessible for off-grid and hybrid systems here, where grid reliability makes storage genuinely valuable rather than optional.
What doesn’t carry over: pricing. US figures like $2.49/watt or a 10.4-year payback period reflect US labour costs, US electricity rates, and US financing — none of which reflect Bangladesh’s market conditions. Anyone evaluating solar costs locally should treat those numbers as context, not a benchmark.
We track shifts like these at Muspana because they shape decisions we make on sourcing and system design — not because the global numbers translate directly into local promises, but because understanding why the global market is moving the way it is helps explain what’s realistically achievable here, and what still needs to be evaluated on its own terms.
Frequently Asked Questions
What’s the difference between solar capacity (GW) and solar generation (TWh)?
Capacity is the maximum power a solar system could theoretically produce under ideal sunlight. Generation is the actual electricity produced over time, which is always lower than theoretical capacity because sunlight isn’t constant throughout the day.
Why did global solar costs fall 90% since 2010?
Mainly manufacturing scale in countries like China, falling raw material and polysilicon costs, improved panel efficiency, and competitive bidding on utility-scale projects. It reflects the cheapest reported utility-scale project pricing, not a universal cost everywhere.
Is solar still getting cheaper in 2026?
Utility-scale project costs have continued trending downward, and forecasts suggest continued capacity growth into 2026. However, residential payback periods don’t always move in the same direction as utility-scale costs, so “cheaper” doesn’t apply uniformly across every part of the market.
Which country has the most installed solar capacity?
China, by a wide margin — with roughly 1,202 GW installed, more than half of the world’s total solar capacity.
Do global solar cost trends apply to Bangladesh?
Only indirectly. Bangladesh doesn’t have utility-scale solar farms comparable to China, the US, or India, so those specific cost figures don’t apply locally. What does apply is the downstream effect: cheaper global panel manufacturing generally means cheaper imported equipment for rooftop and off-grid systems here.
Is solar growing faster than wind energy globally?
Yes. In 2025, solar additions (510 GW) outpaced wind additions (159 GW) by more than three to one, making solar the dominant driver of new renewable capacity worldwide.
