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Solar power expected to dominate electricity generation by 2050—even without more ambitious climate policies (techxplore.com)

submitted 10 months ago by L4s@lemmy.world to c/technology@lemmy.world

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Solar power expected to dominate electricity generation by 2050—even without more ambitious climate policies::In pursuit of the ambitious goal of reaching net-zero emissions, nations worldwide must expand their use of clean energy sources. In the case of solar energy, this change may already be upon us.

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[–] frezik@midwest.social 1 points 10 months ago (1 children)

PoE is 48V. That's high enough to avoid too many losses over wiring distance, but also low enough that it doesn't have to be installed by a licensed electrician.

[–] aard@kyu.de 1 points 10 months ago (1 children)

POE also is point to point, and currently tops out at 30W per link. You could split it off in a socket - but that reduces the available power per device even more.

Or we could use the current AC cabling where we use a single wire over multiple sockets and get a combined 3600W over a standard 16A fuse over 1.5mm2 wire - which with ground and neutral is about the same thickness as a shielded ethernet cable.

[–] frezik@midwest.social 1 points 10 months ago

PoE type 4 can go to 90W, and this is plenty to power modern lights and charge smartphones and laptops. It has the side effect that smart devices no longer need wifi/zigbee/bluetooth/whatever; they get power and network from one cable.

12/3 romex costs about $200 for 100ft, or the same length of 14/3 for $80. 250ft of solid copper (not copper clad aluminum) cat6a costs around $200. You don't need a licensed electrician for 48V wiring. You may not even need to pull a permit on a retrofit. Very few individual things need more than 90W. We can cut the amount of romex going around way down in exchange for a lot more wired networking ports that have other side benefits than just power.

I've pulled a setup like this in my own house. Fishing a bundle of six cat6 cables through a hole isn't much more difficult than a single romex cable.