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NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteThe SPAN Drive is a surgical solution: if your only problem is adding an EV charger without panel capacity, this adds smart circuit sharing for $1,500–$2,200 without touching your …
NuWatt Score
67
out of 100
NuWatt installs the SPAN SPAN Drive in New England and Texas.
We handle permitting, inspection, and provide our own labor warranty on top of the manufacturer warranty. Learn about our installation service →
The SPAN Drive is a surgical solution: if your only problem is adding an EV charger without panel capacity, this adds smart circuit sharing for $1,500–$2,200 without touching your existing panel. It won't give you whole-home energy intelligence, but for pure EV upgrade avoidance it's the most cost-effective certified option on the market.
✓ Service upgrade avoidance
Pending — SPAN Drive addresses EV circuit load specifically. It cannot provide whole-home
Not UL 67 listed
Not Energy Star certified
This panel qualifies for NEC 2026 service upgrade avoidance
When SPAN's load management is active, it dynamically manages your home's total demand to stay within existing service capacity — potentially saving $2,500–$5,000 in utility upgrade costs when adding an EV charger or heat pump. Dynamic capacity: up to 48A managed load.
Five interactive simulators built around this panel's actual specs. Adjust inputs to model your situation — all calculations run locally in your browser.
Compare the 3 paths: upgrade only · smart panel only · both
Based on NEC 220.87 existing-dwelling method. Your 200A service can accommodate these loads.
Utility upgrade only
Expand your service to handle new loads permanently.
$3,500
Your estimate
Smart panel only
SPAN SPAN Drive manages loads dynamically — no utility work needed.
$1,500–$2,200
Installed estimate
Smart panel + upgrade
Worst case: AHJ requires both. Future-proof but maximum cost.
$5,000–$5,700
Combined worst case
This panel CAN avoid the service upgrade
SPAN SPAN Drive uses dynamic load management to keep your home within its current service capacity, even with high-draw appliances like EV chargers and heat pumps. Most AHJs accept this in place of a utility upgrade where NEC 2026 has been adopted.
Upgrade cost avoided
$3,500
Est. annual savings
$500/yr
Net payback period
Immediate
Smart panel costs less than the service upgrade — it pays for itself from day one.
NEC 2026 Note: NEC 2026 Article 705 permits dynamic load management to offset service upgrades — the SPAN Drive is UL 3141 certified but only partially compliant with the full Article 705 provisions.
SPAN SPAN Drive · 2 circuits · Click a circuit to cycle its priority tier
Assign circuit priorities — click to cycle tiers
0 of 2 circuits assignedP1
0.0A
Critical — always on
P2
0.0A
Preferred — if battery allows
P3
0.0A
Optional — shed first
Estimated backup duration — 13.5 kWh · 8 hours target
P1 Critical only
P1 + P2 Combined
What gets shed during the outage
This panel can automatically execute this priority plan — no manual intervention needed during an outage. Note: this panel does not integrate with a battery, so backup duration depends on a generator or grid tie.
Smart Panel vs. Alternatives
| Feature | This Panel | Dumb Subpanel | Transfer Switch |
|---|---|---|---|
| Auto-shed P3 circuits | |||
| App control during outage | |||
| Extend backup duration auto | |||
| Remote monitoring |
How this is calculated: Battery hours = (battery kWh × 0.85) ÷ ((tier amps × 120V) ÷ 1,000). Assumes 120V average for residential circuits and 85% usable capacity. Average amp draw used for runtime (not peak). P3 shedding is immediate; P2 shedding triggers at 30% remaining capacity.
See what “smart load management” actually does, hour by hour
Home profile
Battery size
Peak rate window
Service
200A panel
24-hour load timeline
Amber columns = peak window (4–9)Battery hours extended
0h
vs no load shedding
Peak-rate savings
$0/mo
0.0 kWh shifted/month
Overload events avoided
0
No overloads in this profile
Load profiles are representative 24-hour patterns in amps at 240V residential service. Actual loads vary by home size, occupancy, climate, and specific appliances.
Shedding logic mirrors documented behavior: sheddable loads (dryer, EV charger, dishwasher) are deprioritized when load exceeds 80% of service capacity during peak-rate hours, or when battery SOC drops below 30%.
Peak rates shown are representative TOU schedules. Actual savings depend on your utility’s exact peak window, rate structure, and enrollment in a TOU plan.
Battery runtime is estimated from excess load above 25% of service capacity. Real runtime depends on battery chemistry, depth of discharge settings, and temperature.
SPAN SPAN Drive — cross-brand integration confidence
Select your equipment above to see your integration score.
Choose your solar, battery, EV charger, and generator brands.
Integration data sourced from manufacturer compatibility guides and NuWatt field reports (April 2026). Confidence levels reflect documented support at time of review — always verify with your NuWatt advisor before purchasing. “Native” means API-level integration; “Compatible” means grid-level interop without advanced features.
Circuit visibility depth analysis · Add-On Module
Tier 1 — Whole-Home Blob
Total usage only — no per-circuit visibility
Better than
20% of panels
Type
Add-On Module
Circuits
2 circuits
Monitoring
No
App control
Yes
You get a single total-usage number. There is no way to know which room or appliance is consuming power. Equivalent to a utility smart meter.
This month
$47.20
~312 kWh used
Today
18.4 kWh
Yesterday
21.1 kWh
No per-circuit data available
Illustrative mockup — not a pixel-perfect copy of any vendor app
| Capability | Traditional | SPAN SPAN Drive |
|---|---|---|
| See total home energy use | ||
| Know which circuit is using power | ||
| Control circuits remotely | ||
| Automatically shed loads | ||
| Detect wiring anomalies |
A traditional breaker panel has no communication capability — no app, no monitoring, no control. Every check mark above represents a capability this panel adds over baseline. Tier scores are based on the panel’s documented feature set, not marketing claims.
NuWatt installs this panel across New England and Texas. Get a free quote — we handle permitting, inspection, and provide our own labor warranty.
Get a Free QuoteThe SPAN Drive is a surgical solution: if your only problem is adding an EV charger without panel capacity, this adds smart circuit sharing for $1,500–$2,200 without touching your existing panel. It won't give you whole-home energy intelligence, but for pure EV upgrade avoidance it's the most cost-effective certified option on the market.
Yes — the SPAN Drive is UL 3141 certified, which under NEC 2026 Article 705 allows it to substitute for a utility service upgrade (typically $2,500–$5,000) when adding new high-draw loads like EV chargers or heat pumps. The panel dynamically manages total load so it never exceeds your existing service capacity. Check with your local authority having jurisdiction (AHJ) to confirm NEC 2026 has been adopted in your area.
The SPAN Drive hardware costs $1,500–$2,200. As an add-on module, installation is typically simpler than a full panel replacement — expect $500–$1,200 in labor and permits. Total installed cost is approximately $2,000–$3,400.
Most other brands are compatible via standard grid interconnect.
The SPAN Drive does not support direct battery integration, so it does not provide backup power during an outage on its own. For outage protection, you would need a compatible battery system paired with a panel that supports battery integration.
Yes — the SPAN Drive supports EV charger integration. With its load management, it can dynamically share power between your EV charger and other high-draw loads (like a heat pump or dryer), preventing breaker trips without requiring a service upgrade. If you are adding an EV charger, the Section 30C federal tax credit is active through June 30, 2026 and covers 30% of EV charger hardware and installation costs (up to $1,000 for residential installations).
NuWatt engineers match you with the right panel based on your service size, solar setup, EV plans, and budget — and we install it across New England and Texas.
Get Free Smart Panel QuoteNo commitment. No spam. Our engineers respond within one business day.