Timeline for Electrical load calculation to see if I can install heat pump water heater and EVSE
Current License: CC BY-SA 4.0
16 events
| when toggle format | what | by | license | comment | |
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| Jul 16, 2023 at 7:07 | vote | accept | user162793 | ||
| May 27, 2023 at 3:40 | comment | added | Harper - Reinstate Monica | @user162793 OP Thanks for that. However, that's only an Emporia problem because of their particular idiocy. It is not a condemnation of "EVSE talks to clamp ammeters on the mains" energy management in general. I /facepalm for Emporia, and will stop mentioning their unit in particular. Certainly, don't let it drive you to one of those old-tech "CLACK" load shed devices. | |
| May 26, 2023 at 19:13 | comment | added | user162793 | Yes cost and wait time is confirmed with PG&E for upgrading my service. Unfortunately the Emporia EVSE cannot be used for load management, see reddit.com/r/evcharging/wiki/load_management | |
| May 26, 2023 at 1:00 | comment | added | nobody | @user162793 No, you're looking at dumb load-shed devices that just completely disconnect the EVSE. Smarter EVSEs dynamically tell the EV how much it can draw depending on what other loads are active. Also those load-shed devices are insanely overpriced. Over $1000 for the DCC-10 (before tax and shipping)? Highway robbery! The Emporia current monitor add-on is like $100. | |
| May 25, 2023 at 21:15 | answer | added | Harper - Reinstate Monica | timeline score: 1 | |
| May 25, 2023 at 21:06 | comment | added | Harper - Reinstate Monica | @manassehkatz many utilities are facing supply constraints on neighborhood delivery (not because of EVs necessarily), there seems to be a world transformer shortage for some reason... also note a place like Sunnyvale most stuff will be undergrounded and that makes everything more complicated. However this is the 21st century for Pete's sake. There is no earthly reason anyone needs a service upgrade anymore; Energy Management Systems exist (not that faff OP is mentioning; it's much better.) | |
| May 25, 2023 at 20:54 | comment | added | manassehkatz-Moving 2 Codidact | glad I'm not in California. But seriously - is this confirmed with utility and not just anecdotal from others in the area? | |
| May 25, 2023 at 20:54 | comment | added | manassehkatz-Moving 2 Codidact | Wow! In my neighborhood (Maryland near Washington, DC; Pepco) it was fast and easy to get a service upgrade (I mean, electrician had to do a lot of work and some parts hard to get at the time, but Pepco part was easy). Pepco actually replaced the line (overhead, not underground, but my electrician has done some underground heavyups recently as well) on a few days notice. Crazy thing is, my neighborhood had every single line replaced (and a lot of poles replaced with taller ones, etc.) a few years ago due to frequent storm outages, so 99+% it was already a 200A-ready line. One more reason I'm | |
| May 25, 2023 at 20:48 | comment | added | user162793 | @manassehkatz-Moving2Codidact upgrading the service requires trenching with a wait time of a couple of years and a cost close to $15,000! | |
| May 25, 2023 at 14:57 | comment | added | manassehkatz-Moving 2 Codidact | It is a real shame that this meter main is so small (A, not spaces). It may be very easy for the utility to upgrade you to 200A - possibly even by pressing a few buttons. But you can't go past 100A without replacing this box. | |
| May 25, 2023 at 12:48 | comment | added | user162793 | @ThreePhaseEel yes I did consider Sanden/ECO2 but it will be harder to install. It will have to run to the other side of the garage and our front yard is small so we want to avoid placing any outdoor unit there. I just noticed Rheem has 15A/240V hybrid water heaters but they are hard to get. That might work. If my calculations are right I would have 25A/240V for EVSE. | |
| May 25, 2023 at 11:44 | comment | added | ThreePhaseEel | Is there a reason you're stuck on the 30A/240V hybrid units? I was thinking a pure-play split-system HPWH or reverse cycle chiller would be a superior option (the Sanden/ECO2 units are 15A/240V, for instance) | |
| May 25, 2023 at 11:18 | comment | added | user162793 | Yes I'm already mentioning DCC-10, EVEMS, SimpleSwitch 240M in my post as option 2. | |
| May 25, 2023 at 11:06 | comment | added | nobody | There are EVSEs that put current sensors on your main feed and dynamically tell the car how much it can take without exceeding your service size, so they basically don’t count towards the load calculation. Might be an option. | |
| May 25, 2023 at 10:11 | history | edited | user162793 | CC BY-SA 4.0 |
added 2 characters in body
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| May 25, 2023 at 10:05 | history | asked | user162793 | CC BY-SA 4.0 |