Translation guide
The most common and natural way to express 'solar power' in Japanese is 太陽光発電 (taiyōkō hatsuden), which specifically refers to photovoltaic power generation. For the general concept of energy from the sun, 太陽エネルギー (taiyō enerugī) is used. In casual contexts, ソーラー (sōrā) is also common.
Referring to solar power as electricity produced by solar panels, often in the context of energy generation, home systems, or environmental technology.
This is the standard technical and everyday term for photovoltaic power generation. It literally means 'sunlight power generation' and is used in formal and informal contexts.
This house uses solar power.
A common alternative using the loanword 'solar'. Slightly more casual and often used in product names or marketing.
We installed a solar power system.
Direct loanword from English, used occasionally in branding or casual speech, but less common than ソーラー発電 or 太陽光発電.
Referring to solar energy in a broad sense, including thermal or passive solar, not necessarily electricity.
In informal conversation, using a shortened form to refer to solar panels or solar energy systems.
A common abbreviation for anything solar-related, such as solar panels, solar power, or solar energy. Very natural in casual speech.
We have solar panels installed.
Use 太陽光発電 when specifically talking about electricity generated from sunlight (photovoltaics). Use 太陽エネルギー for the broader concept of energy from the sun, including heat and light. In many everyday contexts, 太陽光発電 is the default for 'solar power' as an energy source for homes.
I installed solar power panels on the roof.
Solar energy drives the Earth's climate.
ソーラー is a versatile casual term. It can refer to solar panels, solar power systems, or solar energy in general. It's often used in compound words like ソーラーパネル (solar panel) or ソーラーシステム (solar system). In conversation, you can simply say ソーラーにしてる (I have solar) to mean you have solar panels installed.
Solar power is an environmentally friendly energy source.
This gadget runs on solar power.
Plants grow using solar energy.
Specifically refers to solar thermal energy, i.e., heat from the sun. Used for solar water heaters or passive heating.
Heat water with solar power.
Thanks to solar power, our electricity bill went down.