Is SPAN Panel the Wrong Choice for All-Electric Homes?
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- čas přidán 25. 07. 2024
- The SPAN IO Smart Electric Service Panel is a really neat approach to solving some electrical service load issues. But there are several drawbacks that make it the wrong choice in many situations. Especially all-electric homes.
Intro: 00:04
How SPAN Panel Works: 00:49
Where SPAN Panel Makes Sense: 04:54
Where SPAN Panel Falls Flat: 05:34
Running Some Numbers: 06:59
homeguide.com/costs/cost-to-r... - Věda a technologie
We don't have a capacity problem. We do have free "nights" (10 hours). This panel seems to make sense, even for the price, in these ways: (1) Identifying when, where, and how much electricity is being used. (2) Immediately shifting of loads equiped to do so and confirmin the change. (3) Load shifting of non-smart devices. (4) Replacing an old, out-of-code panel. (5) Preparation for a solar + battery system. (6) Automatic software upgrades.
Great points. Thanks for sharing.
1) FWIW, you can do 1 for less than $200. Emporia Vue is a great option.
2/3) SPAN only "shifts" loads for the appliances it supports, it's just flipping the breaker for everything else. That isn't really "shifting" except in the most basic sense. There are cheaper solutions to this problem.
4+6) Retrofitting a cool piece of kit in is always fun :). I love the concept of SPAN, the price and lack of integration options makes it hard for me to buy in, personally.
5) We recently put in a couple hybrid inverters and 28kWh of battery (ESS) for ~$7,000 (after fed rebate) that. Something like that would have much better ROI for the "free nights" thing. If you're AC coupling, a panel might need to be replaced to install PV+ESS, but there are ways to do it without that (assuming your panel is up to code).
@@MissingRemote All good points and useful food for thought.
Just to clarify, our plan is to shift loads by setting clocks (e.g. pool filter and cleaner) and smart switches (e.g. air purifiers). Circuit level load shifting would be a "last" resort. I didn't know that integrated devices existed, so I really appreciate your mentioning it.
I’m building my own home as owner builder and have the same issue. Nothing including batteries and their corresponding ATS can handle the 400a service
I need to do an update on this post (www.missingremote.com/blog/2023/10/passive-house-electrical-system-design-beta) to explain our new system design, but this explains the fundamentals of our design. The newer version has an additional 15K and battery. The loads I want to shed on the "Smart Loads" sub panel from the 3x 15Ks. Right now, that's just EV charging. We should have plenty of inverter and battery to manage the other loads for multi-day outages.
I heard they just released the SPAN Panel 48 in Mar 2024 but it wont ship till Q4. I think I want to get it and I dont think we are going to have any issues with the 200A load.
Are you retrofitting or new build?
@@MissingRemote Retrofitting. We have a new HVAC system/heat pump going in tomorrow and two tesla's. We have solar and Tesla two powerwalls.
@@macmovieman1 If you don't mind, LMK how it turns out for you if you opt for a SPAN panel.
@@MissingRemote i’d be happy to update you and I’m definitely holding off for the 48 because I currently have a 32 panel and I’ve had to move six additional into a sub panel and I’d prefer to have it all in one panel and it will give me some room to grow.
Im also looking at building a passive house, though probably not certified, and I’m surprised you need 400 amps. With the much smaller heating/cooling loads, and assuming really energy efficient appliances, I would thought 200 amps would be sufficient, even for an all electric house. Just starting to research, though.
It's certainly possible to build a highly efficient home on 200A (SPAN could make that easier), but in general EVERYTHING in a passive house is electric. It's easy to see how you get past 200A when you add up the induction cooktop that has a 50A circuit, have a couple 30A heat pumps, 40A for the oven, 30A for the ASHP water heater, a 48A EVSE, etc. Our numbers are harder because we're building an ADU (apartment above the garage) that will have its own ASHP, water heater, range, etc.
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Its not worth it. Specially, when the Federal Government is giving you a tax credit.