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One panel to control your solar, battery, EV charger, and every circuit. Learn how SPAN connects your entire electrification stack into a single intelligent system.
SPAN is a 200-amp smart electrical panel that replaces your home's traditional breaker box. Unlike a standard panel that simply distributes power, SPAN adds intelligence to every circuit in your home — giving you real-time monitoring, remote control, and automated load management from a single app.
Think of SPAN as the “brain” of your electrified home. It sits between the grid (or your solar/battery system) and every circuit in your house. It knows exactly how much power each circuit draws, can turn circuits on or off remotely, and can automatically manage loads during outages to stretch your battery backup hours.
SPAN is UL-listed (UL 67), supports 32 individual circuits with two 50A EV-ready spaces, and integrates with all major solar, battery, and EV charging equipment. It is the only residential smart panel that provides true whole-panel replacement with circuit-level intelligence.
Enphase IQ8 microinverters convert DC power from each solar panel into AC power independently. SPAN receives that AC power at the panel and distributes it intelligently across your circuits. The two systems communicate to optimize energy flow in real time.
The key advantage: Enphase IQ8 supports Sunlight Backup — the ability to power essential loads from solar even during a grid outage, without a battery. SPAN makes this dramatically more useful by letting you choose exactly which circuits stay powered during Sunlight Backup mode.
You get two complementary monitoring views:
With Enphase IQ8 + SPAN, your solar panels can power selected circuits during a daytime outage — no battery required. SPAN prioritizes your chosen circuits (fridge, lights, internet router, medical equipment) while shedding high-draw loads that would overwhelm the available solar output. This is a game-changer for homeowners who want basic outage resilience without the $10,000-$15,000 cost of a battery system.
Tesla Powerwall 3 provides 13.5 kWh of storage with 11.5 kW continuous output. Paired with SPAN, you get intelligent battery management that goes far beyond basic whole-home backup.
SPAN automatically identifies and prioritizes circuits you mark as critical — refrigerator, medical equipment, internet, security system. Non-essential loads (pool pump, dryer, oven) are shed automatically during outages.
A traditional panel backing up a whole home drains Powerwall in 4-5 hours. SPAN's intelligent load shedding can extend that same Powerwall to 12-15+ hours by managing which circuits draw power and when.
SPAN + Powerwall can charge the battery during off-peak hours and discharge during peak pricing. The SPAN app shows exactly which circuits benefit from stored energy vs. grid power.
| Scenario | Without SPAN | With SPAN |
|---|---|---|
| 1 Powerwall, winter night | 4-6 hours | 12-18 hours |
| 1 Powerwall, summer day (with solar) | 8-12 hours | 24-48+ hours |
| 2 Powerwalls, winter night | 10-14 hours | 24-36 hours |
| Critical loads only (fridge, lights, Wi-Fi) | N/A (can't select) | 36-48+ hours |
A Level 2 EV charger draws 30-50 amps — a significant load that can push a 200A panel to its limits, especially when the dryer, HVAC, and oven are running simultaneously. Without SPAN, many homes need an expensive service upgrade (from 200A to 400A, costing $5,000-$15,000) just to add EV charging.
SPAN solves this with dynamic load balancing. It monitors total panel load in real time and can temporarily reduce EV charging speed when other high-draw appliances are running, then ramp charging back up when those loads stop. This means many homeowners can add a 48A EV charger without any service upgrade — saving thousands.
If your utility offers time-of-use (TOU) rates, SPAN can schedule EV charging during off-peak hours when electricity costs 30-50% less. For homeowners with solar + battery, SPAN can prioritize charging your EV from stored solar energy rather than drawing from the grid during peak hours.
A 200A to 400A service upgrade typically costs $5,000-$15,000 depending on your area and utility. SPAN's load balancing lets most homes add EV charging, a heat pump, and other electric loads without exceeding 200A. That is a potential savings of $10,000+ compared to a traditional panel approach — and the SPAN panel itself costs $3,500-$5,000 installed.
SPAN + solar + battery creates a powerful stack for maximizing savings on time-of-use (TOU) rate plans. Here is how SPAN orchestrates energy flow throughout the day:
6 AM - 12 PM
Solar production climbs. SPAN runs high-draw appliances (laundry, dishwasher) on solar. Battery begins charging.
12 PM - 4 PM
Maximum production. Battery fills up. Excess exports to grid (net metering credits). EV charges from surplus solar.
4 PM - 9 PM
Utility rates spike. SPAN shifts to battery power. Non-essential loads deferred. Zero grid draw during most expensive hours.
9 PM - 6 AM
Cheapest rates. SPAN schedules EV charging, water heater pre-heat. Battery reserves for next peak period.
In Massachusetts, Connecticut, and Rhode Island, ConnectedSolutions pays battery owners $225-$275/kW per summer season for participating in demand response events. SPAN makes DR events seamless: when a ConnectedSolutions event triggers, SPAN automatically shifts your home to battery power and sheds non-critical loads, maximizing the energy you dispatch to the grid — and the revenue you earn.
A typical homeowner with a 13.5 kWh Powerwall + SPAN earns $800-$1,200/year in ConnectedSolutions payments. Without SPAN, you still earn DR revenue, but SPAN's load management ensures your home stays comfortable during events while maximizing your dispatch.
Power outages are increasingly common across the Northeast and Texas. SPAN transforms how your home handles outages by giving you granular control over every circuit — not just “whole home on or off.”
When the grid goes down, SPAN instantly transitions to backup mode. It automatically turns off circuits you have designated as non-essential:
The math is simple. A typical home draws 5-8 kW constantly. A single Powerwall (13.5 kWh) lasts 2-3 hours at that rate. But your critical loads (fridge, lights, internet, phone chargers) draw only 1-2 kW.
SPAN drops your draw from 5-8 kW to 1-2 kW by shedding non-essential circuits. That same Powerwall now lasts 7-13 hours — or longer if solar is contributing during daylight.
For homes with 2 Powerwalls, SPAN can maintain critical loads for 24-48+ hours, often carrying you through even extended multi-day outages when combined with daytime solar recharging.
During an outage, the SPAN app shows your current battery level, estimated remaining backup time, which circuits are active, and total draw. You can manually turn circuits on or off from your phone — run the microwave for 5 minutes, then turn it back off to conserve battery. You get the control a traditional panel simply cannot offer.
NuWatt evaluates your existing panel, service capacity, and integration needs (solar, battery, EV). We design the SPAN layout and handle all permitting.
1-2 weeks
We pull electrical permits with your local building department. SPAN is UL-listed and meets all NEC codes. Most jurisdictions approve within 1-2 weeks.
1-2 weeks
Your home will be without power for 4-6 hours during the swap. We remove the old panel, mount SPAN, transfer all circuits, connect solar/battery feeds, and commission the system.
1 day (6-8 hours)
We label every circuit in the SPAN app, configure your priority settings, connect your solar/battery monitoring, and walk you through the app. Final inspection scheduled.
Same day
As a certified SPAN installer, NuWatt manages the entire process: site assessment, system design, permitting, installation, inspection scheduling, and warranty registration. We coordinate SPAN installation with your solar, battery, or EV charger project so everything is done in a single visit when possible. Our team serves Massachusetts, Connecticut, Rhode Island, New Hampshire, Maine, Vermont, New Jersey, Pennsylvania, and Texas.
Typical payback: 3-5 years when combined with DR revenue and TOU savings. Immediate ROI if SPAN eliminates the need for a panel upgrade.
SPAN works with virtually all major solar, battery, EV charging, and HVAC equipment. Here is the current compatibility status for the most popular products:
| Product | Integration | Notes |
|---|---|---|
| Enphase IQ8/IQ8+ | Full | Full integration, sunlight backup |
| Enphase IQ7 | Full | Full monitoring, no sunlight backup |
| SolarEdge HD-Wave | Full | Full integration via CT clamp |
| Tesla Solar Inverter | Full | Native integration |
| Generac PWRcell Inverter | Full | Full integration |
| Product | Integration | Notes |
|---|---|---|
| Tesla Powerwall 3 | Full | Deep integration, auto load shed |
| Tesla Powerwall 2 | Full | Full integration |
| Enphase IQ Battery 5P | Full | Ensemble compatible |
| Generac PWRcell | Full | Full load management |
| Franklin WH (FranklinWH) | Partial | Basic monitoring |
| Product | Integration | Notes |
|---|---|---|
| Tesla Wall Connector | Full | Load balancing, TOU scheduling |
| ChargePoint Home Flex | Full | Smart load management |
| JuiceBox 48A | Full | SPAN-aware charging |
| Emporia EVSE | Full | Basic load visibility |
| Grizzl-E Smart | Partial | Circuit monitoring only |
| Product | Integration | Notes |
|---|---|---|
| Mitsubishi Hyper-Heat | Full | Circuit-level monitoring |
| Fujitsu Halcyon | Full | Load management capable |
| Daikin Fit | Full | Smart scheduling via SPAN |
| Carrier Infinity | Full | Circuit control |
| Any 240V HVAC | Full | Universal breaker control |
Common questions about SPAN smart panel integration
Yes. SPAN replaces your traditional breaker panel regardless of whether you have solar. You still get circuit-level monitoring, app control, remote shut-off, and smart load management. Many homeowners install SPAN first and add solar later — the panel is already wired and ready.
Absolutely. SPAN integrates with existing Enphase, SolarEdge, and other inverter systems. Your installer replaces the old breaker panel with SPAN and connects your solar feed. The SPAN app then shows per-circuit consumption alongside your solar production.
SPAN replaces your existing panel — it IS the upgrade. The SPAN panel supports 200A service, which is standard for most homes. If your home currently has 100A or 150A service, your installer may need to upgrade the service entrance at the same time, which NuWatt handles as part of the project.
SPAN replaces your entire breaker panel with a smart panel, providing circuit-level control for every circuit. Lumin is an add-on device that manages selected circuits without replacing the panel. SPAN offers deeper integration, cleaner installation, and a more comprehensive app experience. See our full comparison at /equipment/span-vs-lumin-smart-panel.
The SPAN app provides real-time monitoring of every circuit in your home — you can see exactly how much power your HVAC, kitchen, EV charger, or any circuit is drawing. It also shows solar production, battery state-of-charge, grid status, energy history, and lets you remotely turn circuits on/off or set schedules.
Yes. During an outage, a traditional panel backs up your entire home, draining the battery quickly. SPAN automatically sheds non-essential loads (pool pump, dryer, oven) and keeps only critical circuits running (fridge, lights, internet, medical equipment). This load management can extend a Powerwall from 4-5 hours to 12-15+ hours.
Yes. SPAN can be included in your Propel-financed solar + battery project. Since Propel is a third-party ownership model, the SPAN panel would be part of the equipment package. The Propel system requires FEOC-compliant panels (Silfab 440W), and SPAN integrates seamlessly with compliant configurations.
SPAN typically has a positive effect on insurance. Its arc-fault detection, remote shut-off capability, and UL-listed status can actually reduce risk. Some insurers offer discounts for smart home safety features. We recommend notifying your insurer after installation — most view it favorably.
A typical SPAN installation takes one full day (6-8 hours). This includes removing the old panel, mounting the SPAN panel, transferring all circuits, connecting solar/battery feeds, commissioning the system, and setting up your SPAN app. NuWatt handles all permitting and inspections.
SPAN continues to function normally without internet. All circuit control, load management, and backup operations happen locally on the panel itself. You temporarily lose remote app access and cloud-based analytics, but the panel keeps managing your home. When internet returns, data syncs automatically.
Learn why SPAN is the #1 smart panel for electrified homes
Read moreSide-by-side comparison of the two leading smart panel systems
Read moreWhy upgrading to SPAN makes sense for modern homes
Read moreComplete guide to residential battery storage systems
Read moreYour roadmap to a fully electric, fossil-free home
Read moreEarn $225-$275/kW in annual demand response revenue
Read moreGet a free SPAN smart panel quote from NuWatt. We design and install complete solar + battery + SPAN systems across 9 states.
Certified SPAN installer. NABCEP-certified solar team. One company for your entire electrification project.