$1 million Google Tiny Box prize won

Belgian contenders The Red Electrical Devils have won the $1,000,000 Google Tiny Box prize.

There’s a .pdf of the paper describing their design here, but don’t bother trying to read it if the word “schematic” means nothing to you.

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The winning team exceeded Google’s minimum requirements to win by three times, creating a device that is ten times smaller than existing technologies while meeting all of Google’s other restrictions (such as 95% or better efficiency, air cooling, &etc.) It’s extremely impressive work.

Square D car charger after two months

Back in June I blogged installing a Square D Model EV230WS level 2 electric vehicle charging station.

The new charger is connected by 8 gauge copper wire with a NEMA 14-50 plug and receptacle, a Square D QO series safety switch, and a 40 amp breaker. The actual current draw of the charging station is 30 amps at 240 VAC, so I am still well within code for the 100 amp subpanel in the barn, and having the 14-50 plug means we can potentially support other 240 mobile loads like Teslas, large RVs, plasma cutters, and portable welders.

As promised, the system charges our plug-in Prius in roughly 1.5 hours, and the Nissan Leaf in 5. It’s very simple, no unnecessary bells or whistles, you just plug in and walk away. There’s no need for anything more complex, because the cars themselves both have externally visible charge indicators (the Prius just tells you if it’s done charging or not, but the Leaf gives you a rough indication of charging progress with three top-of-the-dash LEDs) and both cars can give you detailed charts and graphs of charging status and history from their on-board computer systems.

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Last night a nearby lightning strike spiked our power, causing computers to reboot and making the HVAC system noisily unhappy, but the charger (which was plugged into the Prius at the time) didn’t seem to care much, it just rebooted itself and carried on normally.

All in all, we are quite pleased with everything about the charger except the price. All electric vehicle charging stations are ridiculously expensive right now, though, and at $600 the Square D EV230WS was the most cost-effective charger available without building our own.

Installing a Square D Electric car charger

Since we’ve got two electric vehicles and a plug-in hybrid, it seemed like time to install a level 2 charging station.

After spending about six months studying the options, we decided on the Square D Model EV230WS which periodically goes on sale at Amazon and the Big Box stores (where shopping is a baffling ordeal!) for about $600.

Honestly, I don’t know if it’s really appropriate to call things “Square D” any more. The company was bought out by (nominally French) multinational megacorp Schneider Electric in 1991, after which they introduced the “homeline” series of circuit breakers and load centers, which are not as well regarded as the industry-leading QO series. But on the other hand, Schneider does still make the QOs, and they are still an excellent product family – I put a big QO breaker box in my house when I upgraded the main service a few years back, and I am very satisfied with it.

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Now the plug-in Prius should charge in 1.5 hours instead of 3, and the Leaf is supposed to drop from a totally impractical 16 hours (on the level 1 charger) to much more user-friendly 5 hours.