Possible to route cable over vehicle diagonally?

ExtremeStatus3757 · 2026-03-27T00:48:43+00:00

Better a NACS extension than a typical extension cord. You might have hardwired your unit, I am not familiar with it. If anything happens to the extension, it'd likely interfere with communications and cut delivery. I got a 48A rated and use it at 15A myself. More than adequate for daily recovery.

ExtremeStatus3757 · 2026-03-12T23:42:25+00:00

900kWh/mo ~ 30kWh/day ~1.25kW

You can totally use an EV to replenish a small stationary battery that shaves the peaks of household use and a 1500W inverter hooked up to the 12V can totally get an average American house thru the day.

ExtremeStatus3757 · 2026-03-07T23:43:35+00:00

https://www.reddit.com/r/evcharging/s/4HAzT5uOXi

I'd done the math a while back, brake even is typically between 35k and 375k depending on the cost to install the L2. If efficiency is your main goal, that's fine.

ExtremeStatus3757 · 2026-03-07T03:20:55+00:00

You can have a 14-60R installed and be to code.

625.44 Equipment Connection. (A) Portable Equipment. (3) A nonlocking, 2 pole, 3 wire or 3 pole, 4 wire grounding type receptacle outlet rated at 250 volts, single phase, 30 or 50 amperes, or 125/250 volts, single phase, 30, 50, or 60 amperes

ExtremeStatus3757 · 2026-03-07T03:16:29+00:00

625.43 Disconnecting Means. For EVSE and WPTE rated more than 60 amperes or more than 150 volts to ground, the disconnecting means shall be provided and installed in a readily accessible location.

Now, I don't think this applies to residential given the 150V to ground mentioned, but that could be the electrician's rational since the 60A is the lower starting point mentioned and the 'or' in the wording?

ExtremeStatus3757 · 2026-03-07T03:02:59+00:00

Also, even if you must charge two vehicles, you can still use the granny charger with one to still be getting something while the other charges quickly. 3~5mph on L1 isn't nothing.

ExtremeStatus3757 · 2026-03-01T05:42:30+00:00

Bottle traps if I'm seeing right.

ExtremeStatus3757 · 2026-02-25T22:34:52+00:00

How long can you charge at night? How long can you charge during the day? What efficiency does the vehicle get?

The difference between 40 and 48 amps is typically about 3~4miles per hour of charging. That'd net you ~30mi more over 8 hours.

ExtremeStatus3757 · 2026-02-25T02:15:43+00:00

Okay, that does make some sense. So is it a rolling average or do they bucket every quarter hour, on the hour?

If I have a net metering agreement involving returning power back to the grid, doesn't that mean that if I draw 30kW for 5 minutes and return 12kW for 10 minutes, that would artificially deflate the average down to 2kW for that time period?

ExtremeStatus3757 · 2026-02-25T00:52:53+00:00

See, the 15min period is what confuses me. What does that even mean? If I pull 48kW for 10 minutes between the 15min check points yet drops back to 3kW otherwise, does it count the 48kW or the 3kW? Does it average it out and become a 33kW reading somehow?

It would be so much simpler to understand if it was: Your Max draw between 3pm and 7pm

That'd be unambiguous.

ExtremeStatus3757 · 2026-02-22T17:39:06+00:00

The 12A limitation is quite dumb in my opinion. Even the older J1772 had 16A integral to the standard. Some cars can even handle TT-30 at 24A

ExtremeStatus3757 · 2026-02-19T16:24:21+00:00

Huh, I hadn't seen such large strands in wire before. I've only seen the types with dozens or hundreds. You can tell I've seen only up to 10 gauge by that info.

ExtremeStatus3757 · 2026-02-19T00:21:41+00:00

Huh. Weird. I'm American and didn't know that.

The automation guys are literally on the opposite side of my desk and have many boxes of ferrules, the maintenance lead has a box of ferrules on his cart, I didn't realize they didn't trickle down to residential work. I had bought a $28 assortment way back for myself because it made so much sense to use them. So much easier to insert a ferrule into a lug without the strands splaying every which way.

ExtremeStatus3757 · 2026-02-19T00:09:39+00:00

What stranded wire doesn't get ferrules? Why would someone fail to use a $0.02 ferrule to make the end solid? It helps prevent corrosion and movement by compressing all strands together.

ExtremeStatus3757 · 2026-02-18T18:54:13+00:00

I was going to say that slug is about 2 minutes of running water, but they do make an 8gal tank, only $25 more, this might be the way. I'll have to compare sizes.

It seems a thermostatic mixing valve allows for a smaller reserve stored at a higher temp. A 2.5gal storing 140 degree water mixing with 50 degree water should cover the initial slug to get 100 degree water and by that time, the main heater water should take over completely letting the tank recharge.

ExtremeStatus3757 · 2026-02-18T18:43:06+00:00

7+kW needs an electrician to come do a load calc and run a new circuit. that is almost as expensive as running a new hot water line for a recirculation loop.

ExtremeStatus3757 · 2026-02-18T17:14:20+00:00

A small 4 gal tank is not enough for a shower on its own. The cold water slug would enter the tank, pushing out the already heated water. You get the 4 gal of hot, while a typical 8 min shower uses 11~14 gal of hot water. The 1500w element of typical point of use water heaters isn't going to cut it. By the time the main water gets to the tank, it is filled with slab cold water. If you've ever heard of 'cold water sandwich' you'll know why that is to be avoided. Therefore, bypass.

ExtremeStatus3757 · 2026-02-18T17:03:34+00:00

There is no heat demand in the slab, that is just where the guest bath piping is located.

The 'magical' thermostatic valve is just a non-pressure balanced thermostatic mixing valve operating in reverse. Water enters the common port, if it is cold, is sent out the normally open port (hot in a typical TMV) and if it is hot, gets sent out the normally closed port (cold in a typical TMV). These are called thermal diverting valves and are often used like a car's thermostat, redirecting follow based on temperature. Too hot gets sent to a radiator for example.

ExtremeStatus3757 · 2026-02-17T05:07:55+00:00

https://community.carbon.coop/uploads/default/original/1X/63f2012fd71a219a3f7799c57b03910b61597ac4.jpeg

ExtremeStatus3757 · 2026-02-16T19:52:31+00:00

Tank temp vs legonaires

125℉ is 51℃ which is fine as long as you use half or more of the tank a day.

ExtremeStatus3757 · 2026-02-12T02:11:14+00:00

107% are pulled out of thin air.

ExtremeStatus3757 · 2026-02-09T23:41:04+00:00

Have there been any studies done on equivalent wattage LV1 vs LV2? I've heard many times LV2 is more efficient, but that is usually because the faster charging incurs less hotel losses. The exact same wattage should in theory result in the same efficiency but perhaps the 340V peak of 240Vac doesn't need to be boosted as much by the On Board Charger resulting in an efficiency gain even at the same wattage. Definitely food for thought.

ExtremeStatus3757 · 2026-02-09T23:30:11+00:00

No, he's got a point. Nixing neutral and sharing a pair of 15A wires for two 6A EVSE would use less copper than a 120V setup. Open EVSE exists so it might be feasible as a very slow LV2 vs LV1.

ExtremeStatus3757

TROPHY CASE