Solar Panels Cost Now Only 12 Cents/Watt

[marcus]

From https://finance.yahoo.com/energy/articles/chinese-solar-panels-drop-12-230000963.html
Title : Chinese Solar Panels Drop to 12 Cents a Watt, Rooftop Installs Surge Worldwide
By Alex Kimani , Sept 2026

Chinese-made photovoltaic panels cost 12 cents a watt in 2026, down from $5-$6 in 2000 ...

A Pakistani cement giant has cut its power costs by up to 40% with solar at its production sites ...

Last year, India added a record-breaking 44 GW (gigawatts) of solar power, taking its installed solar capacity to 154 GW with projections that solar will meet half of the country's electricity demand growth through 2030 ...

rooftop solar capacity in the Philippines almost doubled over the 12 months to April, with residential solar panels now able to pay for themselves in just over 3 years ...

Africa is on track to install a record 17 GW of solar capacity in 2026, good for a robust 45% Y/Y increase, with about 75% of this growth driven by distributed, small-scale systems on commercial and industrial rooftops ...

Australia, which currently leads the world in rooftop solar adoption, thanks to an overabundance of sunshine, high electricity costs and strong government incentives. Over 4.3 million homes and small businesses in the country (~43% of total) have solar panels ...

Meanwhile, plug-and-play solar (aka balcony solar or plug-in solar), has become a big thing in Europe. These panels allow users to generate electricity by mounting a small panel and plugging a microinverter directly into a standard household wall socket. UK officially legalized plug-in solar systems in August this year, permitting a maximum AC output of 800W connecting directly to standard wall sockets.

 

[pantaiema]

Pointing to $0.12/watt solar PV panels down from around $5-6/w without detailing the breakdown may overlook the true Total Cost of Ownership (TCO). PV panel itself only accounts for around 15% of a typical rooftop PV setup on the existing roof. But the real cost lies in labour, permit (if required), structural roof preparation, mounting hardware, electrical work, and battery integration.

The long-term economic models must also factor in depreciation and replacement costs. Essential components like inverters, battery systems have significantly shorter lifespans, often requiring replacement in under 10 years to keep the system operational over its lifetime.
Factoring these ongoing cost of depreciation and replacement is essential, so at the end of the lifetime of these essential components, you will still have money available to replace them for the whole system to function properly. Not to mention, if you are going off grid you might need to have your own standby generator, as you can not rely on the weather to supply your electricity need.

If solar PV is really ready to be a primary power source, why aren't data centres using it? The people running data centres understand energy economics better than almost anyone, and they are currently facing massive power shortages. Since these facilities are usually built outside cities where land is cheap, space isn't the problem. If solar were truly viable and cheaper for continuous operations, they would have made the switch already. The fact that they don't rely on solar for their core energy needs is one of the strongest arguments against it as a primary power solution.

 

[centurion]

If solar PV is really ready to be a primary power source, why aren't data centres using it?

space and required power (10-100 MW). Solar panels cannot generate so much continuously.

 

[marcus]

... If solar PV is really ready to be a primary power source, why aren't data centres using it? ...

... a statement Musk made at the World Economic Forum in January about his two companies' solar ambitions. "The SpaceX and Tesla team, both separately, are working to build to 100 GW a year of solar power in the US — of manufactured solar power," he said. "That'll probably take us 3 years or something. These are pretty big numbers, and I'd encourage others to do the same."...

Musk has increasingly focused on solar as an energy source for Tesla's AI and robotics ventures ... In Louisiana, a solar project is being built to help power Meta's massive ... Hyperion AI data center. https://www.businessinsider.com/tesla-texas-solar-factory-elon-musk-100gw-manufacturing-plans-2026-8 , Aug 2026

 

[pantaiema]

... a statement Musk made at the World Economic Forum in January about his two companies' solar ambitions. "The SpaceX and Tesla team, both separately, are working to build to 100 GW a year of solar power in the US — of manufactured solar power," he said. "That'll probably take us 3 years or something. These are pretty big numbers, and I'd encourage others to do the same."...

Musk has increasingly focused on solar as an energy source for Tesla's AI and robotics ventures ... In Louisiana, a solar project is being built to help power Meta's massive ... Hyperion AI data center. https://www.businessinsider.com/tesla-texas-solar-factory-elon-musk-100gw-manufacturing-plans-2026-8 , Aug 2026

From the title:
"Tesla reveals solar plans that could advance Elon Musk’s push to outpace US panel capacity"

"Tesla has revealed a $10.1 billion proposal for a solar factory in Texas, offering the clearest look yet at how CEO Elon Musk could pursue his ambitions to ramp up solar manufacturing in the US, documents show"

If you make and sell solar panels, it makes total sense to promote them. For customers, though, all that really matters is whether it will actually save them money if compared to other visible alternative while it is still safe to use. Is it not clear ?

Don't forget, Elon Musk's has an ambition to bypass Earth's energy and grid limits by building a mega constellation of solar-powered orbital data centres in low Earth orbit. Most orbital data centres, satellites will get power from solar panels as there is not any better energy alternative available out-there. So even if homeowners or ground data centres don't absorb it, there's an increasing demand for solar panels in the space & orbital data centres industry. So developing and manufacturing the most advance solar PV system is in line with his other business.

Not to mention, solar panel is trending in the drone industries. Some drones such as air plane like drones have wide wings covered in photovoltaic solar cells to keep charging the batteries.

 

[pantaiema]

space and required power (10-100 MW). Solar panels cannot generate so much continuously.

Sure, orbital data centres and satellites need Solar PV panels as there’s really no better choice in space. But back on Earth, homeowners and data centre operators are mostly interested in whether it actually cuts their costs while it still safe to use. Right now at least, it just doesn't make financial sense for many people especially if the legacy, a cheaper alternative still exist. Look at the numbers: even with massive government subsidies in developed countries, how many people are actually buying it? How many ground data centres use it as their prime energy supply? As previously stated, the people running data centres certainly understand energy economics better than almost anyone, and they are currently facing massive power shortages. When it is clearly saves money and could fulfil their needs, they'll switch on their own.