Has anyone built an app/driver for the Span (span.io) smart electric panel?

I'm looking to get the Span panel as part of a solar panel upgrade and Powerwall installation. Has anyone done anything with this yet? I see an integration built for Home A**istant, but not finding anything here. Thanks!

Someone may have found a way to reverse engineer for the cloud app on HA but there is no official API available from span cloud or local. Span however does have an Alexa Skill. I do see however SPAN is interacting with the ha Community. Perhaps you can pm @Span-colin over there and get him over here for discussions.

Span has a currently unofficial local REST API, that according to this post from a Span product manager, they plan to support at some point of time.

I looked at the unofficial API. The JSON responses are very logical, and seem simple to parse. My knowledge of Groovy is insufficient to write something that is clean, but perhaps someone like @thebearmay would like the challenge?

Looks like it is local too. Only fly in the ointment, so to speak, is the proximity challenge that they are considering/may have implemented according to the forum post. Can’t determine from this what the client segment is used for as it appears that you can read and control the breakers in the panel without it.

They look like they enabled a token now to bypass the proximity challenge of opening and closing the door 3 times.

If that is so, then the token will need to be passed as a header for each call - easy to do, but would be a snall change.

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Thanks, all for looking into it and digging up the info. @aaiyar - Good info in that post!

@thebearmay - I think this would be a great driver to have for the community since these panels will become more popular, but I haven't landed on the Span panel yet, so please don't spend your time on my behalf!

I’ll hold off then, but should you decide to acquire them let me know and if I have time we can throw something together.


My feeling about the Span panel is that it is a product with short relevancy. With larger batteries and higher load capabilities every year, it isn't as critical that you shut down the heat pump instantly to avoid blowing the battery breaker. I think that automated control of loads when the grid goes down will get more intelligent, like turning the heating temperature down to 60 degrees, or turning off the oven via the appliance's WiFi link, rather than brute force turning off breakers with the Span. I know the pros/cons of the Span may be a little off topic for this forum, but relevant in that it suggests possibilities for more sophisticated home automation in its place.

Good Information!

It's a fair point and we'll likely get there SOME day, but each Powerwall can only handle 30 amps*, so to cover a 200-amp service, you're looking at 6-7 Powerwalls to cover the the full load. So with Span I can put in 2 Powerwalls and adjust loads as needed, saving $40k on all the extra Powerwalls.

*-At least that is what my installer is telling me they can do and I'm still discussing this with them, because Tesla lists the output at 7kW continuous, which is 58A at 120v. 30A is only 2 standard circuits, which doesn't seem right, especially because if I want to power a couple light circuits which only have LEDs, I'm looking at only a few amps for 1 Powerwall. The unfortunate thing is it's about the full capacity of the circuit and not the actual load on the circuit for electrical code regs, and that is where the Span panel comes in allowing me to "overload" the circuits on the Powerwall but limit the actual use to what the Powerwall can handle (i.e. Span will monitor the actual output and cut power to prevent overloading the battery)

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You just need to cover the actual load, plus some margin, not the breaker size, both on-grid and on batteries. You can have way more than 200A of breakers on your 200A service -- there's no limit in the NEC. I have less than 100W of LEDs on some 15A lighting circuits, so I'd calculate that circuit as a 100W (or maybe not even 100%) load on the battery, not 1800W. I'm going to see a SPAN demo this week, so I will ask them how they calculated their critical loads.

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Yeah, good point. I also have significantly more than 200 amps of breakers in my panel on a 200-amp service, so the installer must be referring to actual calculated load. Love to hear what impressions you come back with. I am leaning toward going with the SPAN panel so I have flexibility and also the power monitoring feature.

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