SPAN’s smart electrical panel replaces a home’s breaker box with up to 48 app-controlled circuits and, paired with a compatible battery, lets owners choose which rooms stay powered during an outage, according to SPAN’s product pages. The company lists the panel at a starting price of $2,550 before installation, taxes and shipping, and says circuit-level backup priorities can stretch battery life by about 40% in an outage. It works with Tesla Powerwall, FranklinWH, SolarEdge and Enphase systems, depending on the model.
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SPAN is sold through authorized installers rather than on Amazon, so this review links to SPAN’s official panel page for pricing and installer matching. Everything below comes from SPAN’s datasheet, product page and support articles; any runtime math is my own estimate and labeled that way.
What the SPAN Panel actually is
A SPAN Panel is a full replacement for your main electrical panel, not an add-on monitor. It holds ordinary 1-inch breakers, but each circuit runs through a relay that SPAN can measure and switch. The SPAN Home app on iOS or Android shows live power on every circuit and lets you turn any of them off from anywhere. With a home battery, the same controls decide what stays on when the grid goes down.
That last part is why the panel shows up in so many battery quotes. A conventional install often moves a handful of “critical” circuits into a separate subpanel, which is the approach I explain in my critical loads panel guide. SPAN’s support pages say its panels are designed to replace that critical loads panel, so every circuit becomes backup-eligible and you choose priorities in software.
SPAN Panel MAIN 32 specifications
The MAIN 32 is SPAN’s most widely compatible model. These figures come from SPAN’s Gen 2 datasheet.
| Spec | SPAN Panel MAIN 32 |
|---|---|
| Voltage / grid | 120/240V split phase, 60 Hz |
| Main breaker | 100–200A |
| Busbar rating | 225A |
| Disconnect current | 200A |
| Controllable circuits | 32 (90A max per breaker) |
| Sub-feed lugs | 200A max |
| Short-circuit rating | 22 kA with main breaker installed (10 kA without) |
| Metering | ANSI revenue accurate, ±0.5% |
| Connectivity | Ethernet and Wi-Fi, with cellular backup |
| Enclosure | Indoor and outdoor rated (NEMA 3R), surface or flush mount |
| Breakers | Standard 1-inch, tandem/quad compatible |
| Limited warranty | 10 years |
SPAN notes tandem and quad breakers work in any position, but two circuits sharing one controllable space are monitored and switched together.
The SPAN lineup: 16 to 48 circuits
SPAN’s installer picks the size, but it helps to know the names you’ll see on a quote.
| Model | Type | Circuits | Battery compatibility (per SPAN) |
|---|---|---|---|
| SPAN Panel MAIN 16 | Main breaker | 16 | Powerwall 3, FranklinWH aPower/aPower 2 |
| SPAN Panel MLO 24 | Main lug only | 24 | Powerwall 3, FranklinWH aPower/aPower 2 |
| SPAN Panel MAIN 32 | Main breaker | 32 | Powerwall 2 and 3, Powerwall+, FranklinWH, SolarEdge Home Hub, Enphase IQ |
| SPAN Panel MAIN 40 | Main breaker | 40 | Powerwall 3, FranklinWH aPower/aPower 2 |
| SPAN Panel MLO 48 | Main lug only | 48 | Powerwall 3, FranklinWH aPower/aPower 2 |
A main-lug-only (MLO) panel has no main breaker of its own and relies on a separate service disconnect upstream. SPAN says homes with more than 48 circuits or service above 200A may need two panels, and that a MAIN 32 can only be paired with other MAIN 32 panels in a multi-panel setup.
Battery pairing in detail
SPAN tests and communicates directly with each battery brand it supports, so the list is specific:
- Tesla: Powerwall 3 works with every SPAN Panel. The MAIN 32 also supports Powerwall 2 and Powerwall+ with the matching Backup Gateway or Backup Switch. My Tesla Powerwall 3 review covers the battery itself.
- FranklinWH: aPower and aPower 2 with aGate work across the lineup. See my FranklinWH aPower 2 review.
- SolarEdge: Home Hub inverters with the Home Backup Interface pair with the MAIN 32. My SolarEdge Home Battery review has the battery specs.
- Enphase: IQ Battery 3, 3T, 10 and 10T with IQ System Controller 1 or 2, and IQ Battery 5P with System Controller 3, all on the MAIN 32 only and with SPAN’s Remote Meter Kit. SPAN lists the IQ 10C as not compatible. More in my Enphase IQ Battery 5P review.
SPAN also asks for a wired Ethernet link between the panel and Tesla, SolarEdge or FranklinWH systems so backup priorities work reliably during an outage. Mention that to your installer early, since it affects the wiring scope.
How backup priorities work
In the SPAN Home app you give each circuit a priority level. When the battery system tells SPAN the grid is down, the panel applies those priorities automatically, and you can change them during the outage too. SPAN also shows an estimate of backup time remaining.
Worked example: stretching a 13.5kWh battery
These numbers are estimates to show the logic, not SPAN figures. Say a home has one 13.5kWh battery and an average outage load of 1.5kW with everything on. That’s about 9 hours of backup. If SPAN sheds the electric dryer, an EV charger and a few bedroom circuits so the average drops to 0.9kW, the same battery lasts about 15 hours. Turn off more as the outage stretches on, and the fridge, Wi-Fi, lights and furnace fan can keep going even longer. For the sizing math behind this, see how many batteries it takes to power a house.
| Outage mode | Average load | 13.5kWh battery runtime (estimate) |
|---|---|---|
| Whole home, no shedding | 1.5kW | ~9 hours |
| Comfort mode (big loads off) | 0.9kW | ~15 hours |
| Essentials only | 0.5kW | ~27 hours |
Avoiding a service upgrade
SPAN describes its panel as a certified Energy Management System. When total household draw would exceed the home’s service capacity, it pauses selected circuits until other loads cycle off. SPAN says this works primarily with EV charger loads today. The pitch is that a home on a 100A or 150A service can add an EV charger or heat pump without paying for a utility service upgrade, because the panel keeps total demand in check. Whether your local inspector accepts that approach is a question for your installer.
SPAN also sells SPAN Drive, an EV charger that coordinates with the panel so you can control charging from the same app.
Connectivity and the app
An internet connection is required for app control, energy data and SPAN’s free over-the-air updates. The panel’s gateway uses Ethernet or Wi-Fi and switches to a cellular backup connection when available. The app can also show what each circuit costs to run once you enter your utility rate plan.
Who the SPAN Panel suits
- Homeowners adding a Powerwall, FranklinWH, SolarEdge or Enphase battery who want whole-home backup with control, instead of a small critical-loads subpanel.
- Older homes adding an EV charger or heat pump on a limited electrical service.
- Anyone replacing an aging panel who wants circuit-level energy data.
- U.S. homes only: SPAN says it is available in all 50 states and Puerto Rico.
If you’re still comparing whole-home approaches, my home solar and battery guide and transfer switch vs interlock explainer cover the alternatives.
FAQ
How much does a SPAN Panel cost?
SPAN lists a starting price of $2,550 for the panel, plus installation, taxes and shipping. Installed cost depends on your home and installer.
Does SPAN work without a battery?
Yes. Circuit monitoring, remote on/off control and load management work on grid power alone. Backup priorities need a compatible battery.
Does SPAN work with Powerwall 3?
Yes. SPAN lists Powerwall 3 as compatible with all of its panels.
Is SPAN compatible with Enphase?
Only the MAIN 32, with the SPAN Remote Meter Kit, for IQ Battery 3, 3T, 10, 10T and 5P.
Can SPAN be installed outdoors?
Yes. SPAN says all panels are indoor and outdoor NEMA 3R rated.
What warranty does SPAN offer?
SPAN’s Gen 2 datasheet lists a 10-year limited warranty.
Bottom line
The SPAN Panel turns the breaker box into a control center: you see every circuit, switch any of them remotely and, with a supported battery, decide what stays on in an outage. The MAIN 32 has the broadest battery list, while the 16- to 48-circuit models fit other homes and work with Powerwall 3 and FranklinWH. Get a quote from a SPAN Authorized Installer and confirm battery compatibility and wiring before you commit.