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Understanding Solar Energy

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261 points chmaynard | 1 comments | 20 Mar 25 12:09 UTC | HN request time: 0s | source
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sanj ◴[20 Mar 25 15:40 UTC] No.43424802[source]▶
One thing I haven't seen much coverage on is how to tap into the giant batteries we're driving around in our electric vehicles. These are much bigger than what's currently being deployed in houses.

The V2H standards are just now coming online: https://electrek.co/2025/02/21/nema-bidirectional-ev-chargin...

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r00fus ◴[20 Mar 25 16:51 UTC] No.43425659[source]▶
V2L is one of the reasons I bought the car I did - instead of getting battery backup for the random outages that PG&E gifts us (literally power drops likely to happen whenever we gust over 25mph), I installed a 12 circuit transfer switch and my 75kWh battery in the car can provide reasonable backup without running cables throughout the house (reasonable = 1.9kW max so no hair dryers or running toaster oven + microwave at the same time).

Newer vehicles (like 2025 Ioniq5) can do 12kW throughput (and many trucks can do 9+ kW already).

Once V2H standards are confirmed and deployed I would be able to integrate the Car batteries with home batteries and solar.

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1. PaulDavisThe1st ◴[20 Mar 25 22:10 UTC] No.43429573[source]▶
A Generlink would have simplied your transfer switch rewiring. Just connect the external 240V supply (be it your vehicle, batteries, or a fossil fuel powered generator), and the Generlink shuts down the grid connection and delivers to your regular main service panel. You might need to turn some circuits off when using it, but which circuits and when remains flexible and context dependent.