What is a critical loads panel and why do I need one for my home battery?

A critical loads panel (also called a backup subpanel or essential loads panel) is a secondary electrical panel that isolates the circuits your battery will power during an outage. Instead of trying to back up your entire home, the critical loads panel connects only essential circuits — refrigerator, lighting, internet, medical devices, and select outlets — ensuring your battery lasts longer and your backup system works reliably. Most home battery installations require a critical loads panel unless you invest in a smart panel like Span or Schneider Pulse that can manage circuits dynamically.

Which circuits should I connect to my home battery critical loads panel?

The essential circuits to connect are: refrigerator/kitchen freezer (200W), lighting circuits for key rooms (100-200W), internet router and modem (25W), garage door opener (350W intermittent), furnace or boiler controls (100-500W), well pump (1,000-1,500W intermittent), sump pump (800-1,200W intermittent), medical devices like CPAP or oxygen concentrator (150-400W), security system (50W), and select kitchen outlets for small appliances. Avoid connecting electric water heaters (4,000W), electric dryers (5,000W), EV chargers (7,000-11,000W), and central AC compressors (3,000-5,000W) unless you have a 20+ kWh battery system.

How much does a critical loads panel installation cost in 2026?

A critical loads panel installation for a home battery system costs $1,200-$3,500 including materials and labor. The subpanel itself is $200-$600, the transfer switch or battery gateway adds $300-$1,000, circuit relocation and wiring runs $400-$1,200, and permitting/inspection costs $100-$400. Tesla Powerwall installations include a Backup Gateway or Load Center, while Enphase uses the IQ System Controller, and FranklinWH uses the aGate — these brand-specific components may be bundled into the total system price.

Can I run my air conditioner on a critical loads panel with a battery?

You can run a high-efficiency mini-split heat pump (700-1,200W) on a critical loads panel with a 13.5+ kWh battery for 8-12 hours. However, a central AC compressor drawing 3,500-5,000W will deplete a 13.5 kWh battery in just 2-3 hours. For whole-home cooling backup, you need at least a 20 kWh battery (FranklinWH aPower 2) or 27 kWh (Tesla Powerwall 4). Alternatively, dedicate a single mini-split unit to the critical loads panel for efficient cooling during outages.

What size subpanel do I need for a home battery backup system?

Most home battery critical loads panels use a 60-amp or 100-amp subpanel with 8-16 circuit slots. A 60A subpanel handles up to 14.4 kW of loads at 240V (sufficient for most essential circuits). A 100A subpanel handles 24 kW and allows future expansion. Count your planned circuits: a typical essential loads setup needs 8-12 spaces (refrigerator, lights, internet, garage, furnace, medical, sump pump, outlets). Buy a panel with 25% more slots than you currently need to allow for future additions.

What is the difference between an automatic transfer switch and a critical loads panel?

An automatic transfer switch (ATS) detects grid outages and switches your home's power source from grid to battery in under 20 milliseconds — it is the switching mechanism. A critical loads panel is the physical subpanel where your essential circuits are wired. In most modern battery systems, the ATS is built into the battery gateway (Tesla Backup Gateway, Enphase IQ System Controller, FranklinWH aGate), which then feeds power to the critical loads subpanel. You need both: the gateway provides the switching, and the subpanel provides the circuit separation.

Can I add circuits to my critical loads panel after installation?

Yes, as long as your subpanel has available slots and your battery system has sufficient capacity. When installing your critical loads panel, choose a subpanel with 4-6 spare slots beyond your initial needs. Popular upgrades include adding a mini-split AC circuit, an EV charger circuit (requires 40A+ breaker and 15+ kWh battery), or a second refrigerator. Always have a licensed electrician add circuits, and ensure your battery inverter can handle the additional continuous load.

Does a critical loads panel require a permit and inspection?

Yes. Installing a critical loads subpanel is a significant electrical modification that requires an electrical permit from your local authority having jurisdiction (AHJ). The installation must comply with NEC Article 702 (Optional Standby Systems) or NEC Article 710 (Standalone Systems). Your installer will handle permitting and schedule the inspection. Typical permit fees are $100-$300, and inspections are usually completed within 1-2 weeks of the installation. Failing to get a permit can void your homeowners insurance and create liability if the system causes property damage.

Home Battery Critical Loads Panel: What to Back Up, Subpanel Sizing, and Cost Guide (2026)

Quick Answer

A critical loads panel is a dedicated subpanel that isolates the essential circuits your home battery will power during a grid outage. Instead of attempting whole-home backup (which drains most batteries in 3-6 hours), a critical loads panel ensures your battery powers only what matters most — refrigerator, lighting, internet, medical devices, heating controls, and select outlets — extending backup runtime to 12-48+ hours. In 2026, a typical critical loads panel installation costs $1,200-$3,500 and includes a 60-100A subpanel, transfer switch or battery gateway, circuit relocation, and permitting. This guide walks through circuit selection, subpanel sizing, brand-specific integration, and real-world cost examples.

Key Takeaways

A critical loads panel extends battery backup time by 3-5x by powering only essential circuits instead of the whole home
Typical essential circuits: refrigerator, lighting, internet, furnace controls, garage door, sump pump, medical devices, and security systems — totaling 1-2 kW continuous load
Subpanel sizing: 60A (14.4 kW max) for basic setups, 100A (24 kW max) for larger or future-expandable systems
Installation cost: $1,200-$3,500 including subpanel, transfer switch/gateway, wiring, and permits
Brand-specific gateways: Tesla Backup Gateway 2, Enphase IQ System Controller 2, and FranklinWH aGate each integrate differently with critical loads panels
Avoid connecting high-draw appliances: electric water heaters (4,000W), dryers (5,000W), EV chargers (7,000W+), and central AC (3,500W+) unless you have 20+ kWh of battery capacity
Plan for expansion: choose a subpanel with 25% more circuit slots than your current needs

What Is a Critical Loads Panel?

A critical loads panel — sometimes called an essential loads panel, backup subpanel, or protected loads panel — is a secondary electrical panel installed alongside your main service panel. Its purpose is to electrically isolate the circuits that your battery system will power during a grid outage.

Why You Need One

Without a critical loads panel, your battery system faces a choice:

Whole-home backup: The battery attempts to power everything in your house, including high-draw appliances like electric water heaters, dryers, and AC compressors. A 13.5 kWh battery depletes in 2-4 hours under whole-home load.
No backup: The battery only provides TOU arbitrage and self-consumption savings but offers no outage protection.
Critical loads panel: The battery powers only the circuits wired to the subpanel, extending backup time to 12-48+ hours by excluding non-essential high-draw loads.

Option 3 is what most homeowners choose. It is the standard configuration recommended by Tesla, Enphase, FranklinWH, and virtually every battery manufacturer and installer.

The Exception: Smart Panels

In 2025-2026, smart electrical panels like the Span Panel, Lumin Smart Panel, and Schneider Electric Pulse have introduced an alternative. These panels replace your main service panel and can dynamically control individual circuits, eliminating the need for a separate critical loads subpanel. However, smart panels add $1,500-$4,000 to the installation cost and are not yet universally compatible with all battery brands.

For most homeowners in 2026, a traditional critical loads subpanel remains the most cost-effective and reliable choice.

Step 1: Choose Your Essential Circuits

The most important decision in setting up your critical loads panel is which circuits to include. This directly determines how long your battery lasts during an outage and what functionality your home retains.

Tier 1: Must-Have Circuits (Always Include)

These are non-negotiable for safety, food preservation, and basic livability:

Circuit	Typical Load	Daily Usage	Priority
Refrigerator + freezer	150-300W (cycling)	3-4 kWh/day	Critical
Kitchen freezer (if separate)	100-200W (cycling)	1.5-2.5 kWh/day	Critical
LED lighting (key rooms)	100-200W total	1-2 kWh/day	Critical
Internet router + modem	15-25W continuous	0.4-0.6 kWh/day	Critical
Phone/device charging outlets	30-60W	0.3-0.5 kWh/day	Critical
Smoke/carbon monoxide detectors	5W continuous	0.1 kWh/day	Critical

Subtotal: ~5-8 kWh/day, 0.3-0.6 kW continuous

Tier 2: Highly Recommended (Include If Budget Allows)

Circuit	Typical Load	Daily Usage	Notes
Furnace/boiler controls + circulator	100-500W	2-5 kWh/day	Gas furnace needs electricity for blower/ignition
Garage door opener	350W (intermittent)	0.2 kWh/day	Safety/access during emergencies
Sump pump	800-1,200W (intermittent)	0.5-2 kWh/day	Critical in flood-prone areas
Well pump	1,000-1,500W (intermittent)	1-3 kWh/day	Essential if no municipal water
Security system + cameras	50-100W	1-2 kWh/day	Emergency protection
Medical devices (CPAP, O2 concentrator)	150-400W	2-6 kWh/day	Health-critical
Microwave oven outlet	1,000W (short bursts)	0.3 kWh/day	Food preparation
Coffee maker outlet	900W (short bursts)	0.2 kWh/day	Quality of life

Added subtotal: ~7-18 kWh/day, 2-3 kW intermittent continuous equivalent

Tier 3: Conditional (Include Only with Large Battery)

Circuit	Typical Load	Daily Usage	Requires
Mini-split heat pump (per zone)	700-1,200W	5-10 kWh/day	13.5+ kWh battery
Central AC compressor	3,500-5,000W	20-40 kWh/day	27+ kWh battery (Powerwall 4)
Electric water heater	4,000-4,500W	12-15 kWh/day	20+ kWh battery + load shedding
Electric oven/range	2,000-3,500W	3-5 kWh/day	Rarely recommended
Clothes dryer (electric)	4,500-5,500W	3-4 kWh/day	Almost never recommended
EV charger (Level 2)	7,000-11,000W	20-60 kWh/day	Never on critical loads panel
Pool/spa pump	1,500-2,500W	5-10 kWh/day	Not during outages

What NOT to Put on the Critical Loads Panel

These appliances have surge currents or continuous draws that will either trip your battery inverter’s breaker or deplete your battery within minutes:

Electric water heaters (4,000W+): Use a gas/tankless water heater instead, or schedule water heating during solar hours
Electric dryers (5,000W+): Air dry during outages
EV chargers (7,000-11,000W): Never connect to critical loads; charge only when grid is available or solar production is surplus
Electric baseboard heating (per room: 1,500-3,000W): Switch to a mini-split heat pump for efficient backup heating/cooling
Electric range/oven (3,000W per element): Use microwave or induction cooktop (1,500W) on a dedicated outlet instead

Step 2: Size Your Subpanel

Once you have selected your circuits, you need to choose the right subpanel size. Subpanels are rated by amperage and circuit slot count.

Amperage Rating

Subpanel Size	Max Load at 240V	Suitable For
30A	7.2 kW	Very basic: refrigerator, lights, internet, phone charging only
60A	14.4 kW	Standard: all Tier 1 + Tier 2 circuits for most homes
100A	24 kW	Comprehensive: includes mini-split AC or electric water heater with load shedding
125A	30 kW	Whole-home equivalent: for homes with 200A main service and 27+ kWh battery

Recommendation for most homes: 60A subpanel with 12-16 spaces. This handles all Tier 1 and Tier 2 circuits comfortably and leaves room for 2-4 future additions.

For homes with solar + 20+ kWh battery: 100A subpanel with 20 spaces. This allows you to include a mini-split AC zone and gives flexibility to add circuits later.

Circuit Slot Count

Count each circuit you plan to connect, then add 25% for future expansion:

Setup	Current Circuits	Recommended Slots
Basic (Tier 1 only)	4-6	8-10 spaces
Standard (Tier 1 + most Tier 2)	8-12	12-16 spaces
Comprehensive (Tier 1-3)	14-20	20-24 spaces

Continuous Load Calculation

The NEC (National Electrical Code) requires that continuous loads be calculated at 125% of their rated value for conductor and breaker sizing. For your critical loads panel:

Subpanel Rating ≥ (Total Continuous Load × 1.25) + Non-Continuous Load

Example:

Refrigerator: 250W continuous → 312W (NEC adjusted)
Lighting: 200W continuous → 250W
Internet: 25W continuous → 31W
Furnace controls: 300W continuous → 375W
Sump pump: 1,000W non-continuous (intermittent duty)
Garage door: 350W non-continuous
Medical device: 200W continuous → 250W

Total NEC-adjusted load: 1,218W continuous + 1,350W intermittent = 2,568W peak At 240V: 2,568W ÷ 240V = 10.7A

Even a 30A subpanel would technically handle this load, but the 60A recommendation accounts for inrush currents, future expansion, and code margins.

Step 3: Choose Your Transfer Method

The transfer switch is what physically switches your critical loads between grid power and battery power. There are three main approaches in 2026:

Option A: Battery System Gateway (Most Common)

Most major battery systems include or offer a proprietary gateway that handles transfer switching:

Battery System	Gateway Component	Transfer Time	List Price
Tesla Powerwall 3/4	Backup Gateway 2 / Load Center	<20 ms	$1,500 (included in some bundles)
Enphase IQ Battery	IQ System Controller 2	<20 ms	$1,300
FranklinWH aPower 2	aGate	<20 ms	$1,200
SonnenCore+	sonnenProtect	<50 ms	$800
LG Energy Solution	Energy Hub Inverter	<20 ms	Included

How it works: The gateway sits between your main panel and the critical loads subpanel. It monitors grid status continuously. When the grid drops, it disconnects from the utility and connects the battery to the critical loads panel — all in under 20 milliseconds (fast enough that computers and routers don’t reboot).

Option B: Standalone Automatic Transfer Switch (ATS)

If your battery system does not include a gateway, or if you are installing a DIY/off-grid battery system, you need a standalone ATS:

Generac RTSW200A3: 200A, $800-$1,200
Reliance Controls THP207: 200A, $400-$600
Schneider Electric ATS22: 100A, $500-$800

Use case: DIY battery installations, off-grid systems, or retrofitting an existing battery without a native gateway.

Option C: Manual Transfer Switch (Budget Option)

A manual transfer switch requires you to physically flip a lever during an outage. It costs $200-$500 but offers no automatic switchover.

Use case: Budget installations, infrequent outages, or as a backup to an automatic system.

Not recommended for: Medical device dependence, elderly homeowners, or areas with frequent unexpected outages.

Step 4: Installation Process

Typical Installation Timeline

Step	Duration	Description
Load assessment	1-2 hours	Electrician surveys your home, identifies circuits
Subpanel selection	Same day	Based on circuit count and load calculation
Permitting	1-2 weeks	Electrical permit from local AHJ
Installation day	6-10 hours	Subpanel mounting, circuit relocation, gateway wiring
Inspection	1-2 weeks after install	AHJ inspects for code compliance
Commissioning	1-2 hours	Battery system configured, load tested

What Happens on Installation Day

Power shutdown: Main breaker turned off — your home is without power for 4-8 hours
Subpanel mounting: The critical loads panel is mounted next to (or below) your main panel
Circuit relocation: Selected circuits are disconnected from the main panel breakers and reconnected to breakers in the new subpanel
Gateway installation: The battery gateway (Tesla Backup Gateway, Enphase IQ Controller, etc.) is wired between the main panel and subpanel
Feeder breakers: A new high-amperage breaker is installed in the main panel to feed the gateway/subpanel
Grounding and bonding: Subpanel is properly grounded and bonded to the main panel per NEC requirements
Labeling: Every breaker in both panels is clearly labeled
Testing: Battery system is commissioned, and each critical circuit is tested under backup power

DIY vs Professional Installation

Can you install a critical loads panel yourself?

Legally, in most jurisdictions, no — unless you are a licensed electrician or your state allows homeowner electrical work with a permit (some do, like Florida and Texas, with restrictions).

Even where legal, it is strongly discouraged because:

NEC Article 702 and 710 requirements are complex
Improper grounding can create lethal fault paths
Meter base and service entrance work requires utility coordination
Battery gateway integration requires manufacturer-specific certification for warranty validity
Insurance claims can be denied for unpermitted electrical work

Hire a licensed electrician who is certified by your battery manufacturer. Tesla, Enphase, and FranklinWH all maintain certified installer networks.

Step 5: Real-World Cost Breakdown

Standard Installation: 60A Critical Loads Panel with Tesla Powerwall 3

Component	Cost Range
60A subpanel (Square D, Siemens, or Eaton) with main breaker	$200-$400
Tesla Backup Gateway 2	$1,200-$1,500 (may be bundled)
Circuit relocation (8-12 circuits) — materials + labor	$400-$800
Conduit, wire, connectors, hardware	$150-$300
Electrical permit	$100-$250
Labor (licensed electrician, 6-8 hours)	$600-$1,200
Total critical loads panel cost	$2,650-$4,450

Note: This is the cost of the critical loads panel setup only, separate from the battery system itself.

Budget Installation: 30A Critical Loads Panel with FranklinWH aGate

Component	Cost Range
30A subpanel (6-8 spaces)	$100-$200
FranklinWH aGate (includes ATS)	$1,000-$1,200
Circuit relocation (4-6 circuits)	$200-$400
Materials (wire, conduit, hardware)	$100-$200
Permit	$75-$150
Labor (4-6 hours)	$400-$800
Total	$1,875-$2,950

Premium Installation: 100A Subpanel with Span Smart Panel

Component	Cost Range
Span Smart Panel (replaces main panel, no subpanel needed)	$3,500
Circuit migration to Span Panel	$500-$1,000
Span-certified electrician labor (8-12 hours)	$1,000-$2,000
Permit + inspection	$200-$400
Total	$5,200-$6,900

The Span Panel eliminates the need for a separate critical loads subpanel because it can dynamically assign any circuit to battery backup through its app interface.

Brand-Specific Critical Loads Integration

Tesla Powerwall 3 & 4

Tesla offers two approaches:

Tesla Backup Gateway 2 ($1,500): The gateway installs between the utility meter and your main panel. It supports whole-home backup, meaning all circuits remain powered — but you manage runtime by turning off non-essential breakers via the Tesla app during an outage.
Tesla Powerwall Load Center (included with some installations): A Tesla-branded subpanel that integrates directly with Powerwall for a cleaner installation. Each circuit can be designated as “backup” or “non-backup” through the Tesla app.

Pros: Seamless integration, app-controlled circuit prioritization, fastest transfer time (15ms) Cons: Whole-home backup approach drains battery faster unless you manually shed loads; Load Center adds cost

Enphase IQ Battery 5P / 15

Enphase uses the IQ System Controller 2 as the gateway:

Installs between the main panel and critical loads subpanel
Supports up to 4 IQ Batteries (20.48 kWh total) or 2 IQ Battery 15s (30.72 kWh)
Includes Envoy communications gateway for app monitoring
Microgrid-forming inverter provides clean, stable power

Pros: Excellent for homes with Enphase microinverters; modular battery expansion Cons: IQ System Controller is required even for a single battery, adding $1,300

FranklinWH aPower 2

FranklinWH uses the aGate smart gateway:

Supports up to 15 aPower 2 batteries (300 kWh total)
Built-in ATS with sub-20ms transfer
Includes 16-circuit subpanel in some configurations
Supports both grid-tied and off-grid operation

Pros: Best value per kWh; large capacity expansion; integrated subpanel option Cons: Fewer certified installers than Tesla/Enphase in some regions

Optimizing Your Critical Loads Panel for Maximum Runtime

Strategy 1: LED Everything

Replace all bulbs on your critical loads circuits with LED equivalents. A home with 20 incandescent bulbs (60W each) draws 1,200W. The same home with LED bulbs (9W each) draws just 180W — saving 1,020W that extends battery runtime by hours.

Strategy 2: Upgrade to High-Efficiency Refrigerator

Older refrigerators (pre-2015) draw 400-600W continuously. A modern ENERGY STAR refrigerator draws 100-200W. If your critical loads panel powers an old fridge, upgrading can add 4-8 hours of backup time.

Strategy 3: Add a High-Efficiency Mini-Split for Backup Cooling/Heating

Instead of connecting your central AC (3,500W+) to the critical loads panel, install a single-zone mini-split heat pump (700-1,200W) in your main living area. This provides efficient cooling during summer outages and heating during winter outages while using 70% less power than central HVAC.

Recommended models for battery backup:

Daikin 17 Series: 9,000 BTU, 700W cooling, $1,200-$1,800
Mitsubishi MUZ-FH: 12,000 BTU, 900W cooling, $1,500-$2,200
LG ART COOL: 9,000 BTU, 650W cooling, $1,000-$1,500

Strategy 4: Use Smart Outlets for Load Shedding

Even on your critical loads panel, you can use Wi-Fi smart outlets (TP-Link Kasa, Shelly, Wyze) to automatically disconnect non-essential devices during battery operation:

Automation Example (Home Assistant):
  trigger:
    - platform: state
      entity_id: sensor.home_battery_mode
      to: "backup"
  action:
    - service: switch.turn_off
      entity_id:
        - switch.garage_charger
        - switch.basement_freezer
        - switch.bathroom_heater

This can extend battery runtime by 30-50% during extended outages.

Strategy 5: Time-Shift High-Power Activities

During an outage powered by battery:

Run the microwave for 2 minutes, not 10
Open the refrigerator/freezer only when necessary
Charge phones/devices during peak solar hours if you have solar
Run the sump pump only when the float switch activates (automatic)
Do laundry and run the dishwasher only when grid power returns

These habits can double your effective battery runtime during multi-day outages.

Common Mistakes to Avoid

Mistake 1: Undersizing the Subpanel

The most common mistake is installing too small a subpanel. A 30A, 6-space panel may seem sufficient today, but what happens when you add a mini-split AC next year or buy a medical device? Always install a panel with at least 25% more capacity than your current needs. The cost difference between a 30A/6-space panel and a 60A/12-space panel is only $50-$100, but upgrading later costs $500+ in electrician labor.

Mistake 2: Forgetting the Furnace

Many homeowners focus on refrigerators and lights but forget that their gas furnace requires electricity for the blower motor, igniter, and circulator pump. Without furnace controls on the critical loads panel, a winter outage means no heat — even with a full battery. Electric furnaces and heat pumps need their own dedicated circuit on the subpanel.

Mistake 3: Overloading the Panel with HVAC

The opposite mistake is connecting a 4,000W central AC to a 60A subpanel backed by a 13.5 kWh battery. The AC alone will deplete the battery in under 3 hours. Either exclude central AC from the critical loads panel or upgrade to a 27+ kWh battery system. A mini-split is the smart compromise.

Mistake 4: No Surge Protection

Motor-driven appliances (refrigerator compressors, well pumps, sump pumps) create inrush currents 3-6x their running wattage for 1-3 seconds. Without proper surge protection, these inrush currents can trip the battery inverter’s breaker or damage sensitive electronics. Install a whole-house surge protector ($50-$150) at the critical loads panel.

Mistake 5: Improper Neutral Bonding

In a subpanel fed by a battery gateway, neutral-to-ground bonding must be done correctly. If the main panel bond remains and the subpanel also bonds neutral to ground, you create parallel neutral paths that can cause ground fault currents and interfere with GFCI/AFCI breakers. Your electrician must follow NEC 250.32 for subpanel grounding and bonding. This is one of the most common inspection failures.

Critical Loads Panel and Insurance

Does a Critical Loads Panel Affect Homeowners Insurance?

In most cases, a properly permitted and inspected critical loads panel does not increase your insurance premium and may actually qualify you for discounts:

Allstate: Up to 5% discount for installed backup power systems
USAA: Up to 10% discount for military families with backup generators/batteries
State Farm: Case-by-case; may require rider for systems over $25,000
Liberty Mutual: 3-5% protective device discount

Required Documentation for Insurance

Keep these documents for insurance and warranty purposes:

Electrical permit and final inspection approval
Battery system installation certificate (from certified installer)
Critical loads panel circuit schedule (which breakers feed which circuits)
UL 9540 or UL 9540A certification for the battery system
Equipment receipts and warranties

Future-Proofing Your Critical Loads Panel

Plan for These 2026-2028 Additions

EV Charging Circuit (40A, 9.6 kW): Even if you don’t have an EV yet, run a dedicated conduit from your subpanel to the garage. When battery systems grow to 40+ kWh or V2H (vehicle-to-home) becomes standard, you’ll be ready.
Induction Cooktop Circuit (40A, 9.6 kW): As gas appliances are phased out in some states (California, New York), induction cooking is becoming the standard. A dedicated circuit on a 100A subpanel ensures you can cook during outages.
Heat Pump Water Heater Circuit (30A, 7.2 kW): Heat pump water heaters are 3-4x more efficient than electric resistance heaters, making them feasible on battery backup with proper load scheduling.
Smart Panel Upgrade Path: If you install a traditional critical loads panel now, you can still upgrade to a Span or Lumin smart panel later. Keep the circuit schedule documented for easy migration.

Home Battery Backup Time Calculator — Calculate exactly how long your battery lasts on critical loads
Smart Electrical Panel + Home Battery Integration — Compare Span, Lumin, and Schneider smart panels
Whole Home Battery Sizing Calculator — Size your battery system for backup and TOU savings
Home Battery Installation Mistakes to Avoid — Common pitfalls during battery installation
Tesla Powerwall 4 Cost vs Savings — Detailed Powerwall economics analysis
Home Battery Permit & Inspection Guide — Navigate permitting requirements by state
Home Battery vs Generator Comparison — Compare battery vs fossil fuel backup options
Best Home Battery Systems Summer 2026 Ranked — Top-rated battery systems for 2026

Ready to Set Up Your Critical Loads Panel?

Setting up a critical loads panel is the single most impactful decision you’ll make for your home battery system. It determines your backup runtime, your daily savings through optimized load management, and your family’s comfort during outages.

Next steps:

Use our Home Battery Payback Calculator to model your savings
List your essential circuits using the tier system above
Get quotes from 2-3 certified installers who can design your critical loads panel
Verify your battery system includes a compatible gateway (Tesla Backup Gateway, Enphase IQ Controller, or FranklinWH aGate)
Schedule your installation before peak storm season — installer backlogs in summer can extend wait times to 8-12 weeks

Have questions about which circuits to prioritize? Use our calculator tool above, or consult with a certified battery installer who can perform a site-specific load assessment.