Loading NuWatt Energy...
We use your location to provide localized solar offers and incentives.
We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
Loading NuWatt Energy...
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 QuoteIf you have an Enphase IQ solar system with an IQ Battery, the IQ Load Controller is a no-brainer add-on. It extends backup duration by automatically shedding non-critical loads (E…
NuWatt Score
98
out of 100
If you have an Enphase IQ solar system with an IQ Battery, the IQ Load Controller is a no-brainer add-on. It extends backup duration by automatically shedding non-critical loads (EV charger, dryer) when battery drops low — and it's UL 3141 certified for service upgrade avoidance. The hard constraint: it only works within the Enphase ecosystem and controls just 4 circuits.
✓ Service upgrade avoidance
✓ Enphase is NEC 2026 compliant within the Enphase ecosystem. IQ Load Controller's
Not UL 67 listed
Not Energy Star certified
This panel qualifies for NEC 2026 service upgrade avoidance
When Enphase'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 40A managed load.
Ecosystem lock-in: Enphase IQ Load Controller only works within the Enphase ecosystem — it will not function with Tesla Powerwall, Generac, or any other battery brand.
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
Enphase IQ Load Controller manages loads dynamically — no utility work needed.
$1,200–$1,800
Installed estimate
Smart panel + upgrade
Worst case: AHJ requires both. Future-proof but maximum cost.
$4,700–$5,300
Combined worst case
This panel CAN avoid the service upgrade
Enphase IQ Load Controller 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 lets load-managing panels like the IQ Load Controller count toward dynamic capacity — enabling EV chargers and heat pumps without a service upgrade in jurisdictions that have adopted NEC 2026.
Enphase IQ Load Controller · 4 circuits · Click a circuit to cycle its priority tier
Assign circuit priorities — click to cycle tiers
0 of 4 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.
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.
Enphase IQ Load Controller — 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
4 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 | Enphase IQ Load Controller |
|---|---|---|
| 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.
Our engineers can advise on whether this panel is the right fit for your home's solar, battery, and EV setup.
Get a Free QuoteIf you have an Enphase IQ solar system with an IQ Battery, the IQ Load Controller is a no-brainer add-on. It extends backup duration by automatically shedding non-critical loads (EV charger, dryer) when battery drops low — and it's UL 3141 certified for service upgrade avoidance. The hard constraint: it only works within the Enphase ecosystem and controls just 4 circuits.
Yes — the Enphase IQ Load Controller 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 Enphase IQ Load Controller hardware costs $1,200–$1,800. 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 $1,700–$3,000.
For solar, it has native (first-party) integration with Enphase. For batteries, it natively integrates with Enphase IQ Battery. Most other brands are compatible via standard grid interconnect. Note: Enphase IQ Load Controller only works within the Enphase ecosystem — it will not function with Tesla Powerwall, Generac, or any other battery brand.
Yes — when paired with a compatible battery system, the Enphase IQ Load Controller is designed to automatically disconnect from the grid during an outage and manage critical loads from battery power. Its load management features can automatically shed non-critical loads (like EV chargers) to extend battery runtime. Without a battery, the Enphase IQ Load Controller alone does not provide backup power.
Yes — the Enphase IQ Load Controller 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.