Tokyo makes solar panels mandatory for new homes built after 2025

https://www.reuters.com/world/asia-pacific/tokyo-makes-solar-panels-mandatory-new-homes-built-after-2025-2022-12-15/

by DamonHD • 4 years ago

54 22 4 years ago

DamonHD4• 4 years ago

This is by far the most popular link that I have posted to my mastodon.energy account! Don't know why! (And yes, I have lobbied my local council here in London to mandate similar...)

t0bia_s4• 4 years ago

China communist gonverment appreciate it.

nowherebeen• 4 years ago

It makes a lot of sense. Solar panels are getting affordable now. I see so many houses built hot climates that always makes me wonder how much energy these houses can harvest if all of them had solar panels on them.

DamonHD4• 4 years ago

And indeed would benefit from having sun kept from their roofs, helping the houses stay cool in summer...

0cf8612b2e1e2• 4 years ago

But making them harder to heat in winter.

eternityforest3• 4 years ago

The whole world needs this. Especially with the absolutely terrifying North Carolina incident.

Green energy is no longer just about the green, we need decentralization to protect against people who don't want us to have electricity at all.

When we finally move on from lithium, maybe they'll start requiring battery backups too.

marssaxman2• 4 years ago

What "North Carolina incident" are you referring to?

ZeroGravitas• 4 years ago

https://en.m.wikipedia.org/wiki/Moore_County_substation_atta...

Gigachad• 4 years ago

Not against the rules but as an interesting data point, somehow Australia has just about archived this with no mandates. I’d say about 80% of buildings, commercial and residential have solar installed.

There have been financial incentives from the government though.

anakaine• 4 years ago

The financial incentives drove this, 100%.

As an Australian, with solar panels, and a not-too-terrible feed in tariff, I'm hoping we can cram more energy production in to less space from solar so that I can upgrade my system in the decade to come, hopefully to match the hybrid I'd like to buy that doesn't yet exist :)

t0bia_s4• 4 years ago

How decentralised exactly solar energy source is when manufacturing is 95% depndent on China?

eternityforest3• 4 years ago

It might not decentralize economic power but it decentralizes how many places a terrorist needs to hit to take down the grid, which is the big reliability concern.

Plus, even if the supply chain went away we'd have decades to build plants before existing panels became unusable.

It's a problem not to have our own panel factories, but that's a problem we can fix.

Technically so is protecting substations, but it doesn't seem like there's that much interest in it, nor is there much research on hardening against another Carrington event.

piceas• 4 years ago

Hamburg too from 2023 and for roof replacements from 2025 for all buildings.

https://www.hamburg.de/energielotsen/beratung/15147914/faqs-...

j_kao• 4 years ago

This is an even more effective strategy given the Japanese culture of constantly rebuilding housing [1]. It does beg the question of how sustainable that practice itself weighed against the benefits of solar installation.

[1] https://www.theguardian.com/cities/2017/nov/16/japan-reusabl...

t0bia_s4• 4 years ago

That makes comrades in CCCP happy. 95% solar panel production is made in China.

Tokyo makes solar panels mandatory for new homes built after 2025

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