LED Guys Electrician C10 Licensed · #1137497 · Van Nuys, CA
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Home Electrical Load Calculator

Fill in your home details and appliances to find out if your panel can handle a Level 2 EV charger — or what upgrade you may need. Based on NEC 220 residential standards used by licensed electricians in California.

NEC 220 Standard Level 2 EV Readiness Panel Upgrade Guidance Built by a Licensed C10

How this works: This calculator uses the NEC Article 220 Standard Method — the same approach used by LADBS-licensed electricians in Los Angeles County. Enter your home details, check off your appliances, and add any custom loads. Results are estimates — a licensed electrician should always perform a final load calculation before any panel work or EV charger installation.

1
Your Electrical Panel
Found on the main breaker label inside your panel door

Look at the main breaker inside your panel — it shows 100, 150, 200, or 400. Most San Fernando Valley homes built before 1990 have 100A service.

Used to calculate your general lighting and receptacle load (NEC 220.12 — 3 VA per sq ft). Auto-filled from address lookup if available.

Helps estimate likely panel size and wiring type for older homes.

2
Kitchen, Laundry & Water Heating
Check every item that applies — even if rarely used
Appliance Type / Notes Amps
Cooking Equipment
Range / Oven
Cooktop (separate)
Microwave (built-in / OTR)
Dishwasher
Garbage Disposal
Trash Compactor
Wine Cooler / Beverage Fridge
Refrigerators / Freezers ~7A each
Laundry
Clothes Dryer
Washer (electric)
Washer-Dryer Combo (240V)
Water Heating
Water Heater
3
HVAC — Heating & Cooling
NEC requires using the larger of heating vs. cooling load
Equipment Size / Notes Amps
Cooling
Central AC (split system) ~19A/ton
Mini-Split Units (total) ~8–15A each
Window / Portable AC units ~8–15A each
Commercial Chiller / Packaged Unit varies
Heating
Electric Baseboard Heaters 1500W/unit
Electric Radiant Floor (circuits) ~8A/circuit
4
Outdoor, Pool, Shop & Specialty Loads
Hardwired or 240V circuits outside the main living area
Appliance Size / Notes Amps
Pool & Spa
Pool Pump
Pool / Spa Heater
Pool Lights (12V transformer)
Hot Tub / Jacuzzi
Sauna (electric)
Irrigation / Sprinkler System
Garage / Workshop
Garage Door Opener(s) ~5A each
Air Compressor (shop)
Welder
Table Saw / Woodworking Tools
Battery Storage / Powerwall
Specialty / Entertainment
Home Theater / AV (sub-panel)
Security / Alarm System
Outdoor Landscape Lighting
Outdoor Kitchen / BBQ (electric)
5
EV Charger Goal
What charger are you planning to add?
6
All Other Loads
Add any hardwired or 240V load not listed above — commercial equipment, medical devices, specialty circuits, etc.

Use the preset buttons below to quickly add common loads, or click "Add Custom Load" to enter any appliance by name and amperage. All loads entered here are added at 100% demand unless you adjust.

Load Description Amps (240V) Demand %

Your Results

Fill in the form and click Calculate

Your load calculation will appear here once you complete the form and click Calculate.

Get a Free Professional Estimate

This tool gives you a solid starting point. Jorge will perform the official NEC load calculation at no charge before any work begins — and pull the LADBS permit so your installation is fully covered.

Call (818) 588-7819 Jorge@ledguyservice.com

How to Read Your Results

What is a residential load calculation?
A residential load calculation estimates the total electrical demand of your home — all appliances, lighting, HVAC, and any new loads you want to add. Under NEC Article 220, a licensed electrician must verify that your panel's rated amperage is sufficient to handle that total demand before adding circuits. This calculator uses the Standard Method (NEC 220.14) which is accepted by LADBS for residential permit applications throughout the City of Los Angeles.
What does "available headroom" mean?
Available headroom is the difference between your panel's rated capacity and your estimated current load. Per NEC 210.20, continuous loads should not exceed 80% of panel capacity. If the calculator shows at least 40–50A of usable headroom, a Level 2 EV charger can likely be added without panel work. Less than that, and Jorge will recommend a load management device, a sub-panel, or a full 200A panel upgrade depending on your situation.
What is the NEC 220 Standard Method?
NEC Article 220 defines how electricians calculate the total electrical load for a residential property. It includes general lighting loads (3 VA per square foot), small appliance circuits (1500 VA per circuit, minimum 2 circuits), laundry circuits, and all fixed appliances. For loads over 3,000 VA, NEC allows a 35% demand factor on the remainder — which reduces the calculated load to reflect real-world usage patterns. This is the same approach used by LADBS-permitted electrical contractors in Los Angeles County.
100A vs 200A panel — what is the real difference for EV charging?
A 100A panel delivers roughly 80 usable amps of continuous capacity (at the 80% NEC rule). Once you subtract typical residential loads — HVAC, water heater, kitchen appliances, lighting — the remaining headroom may be as little as 10–20A. A Level 2 EV charger needs 40–60A of dedicated circuit capacity. In most cases, 100A homes require a panel upgrade to 200A before a Level 2 charger can be added safely and legally. A 200A panel gives roughly 160 usable amps — plenty of room for an EV charger plus all other home loads.
What is a load management device?
A load management device (such as a Span panel, Emporia Vue, or a dedicated EV energy management controller) monitors your home's real-time electrical usage and automatically reduces charger output when other large loads — like your AC or oven — are running. This allows some 100A homes to add an EV charger without a full panel upgrade. Jorge evaluates whether this option is viable for your specific home during the written quote.
What happens if I install a charger without a permit in Los Angeles?
Installing an EV charger without a permit from LADBS is a code violation throughout the City of Los Angeles. Consequences include: potential voiding of homeowner's insurance; a required disclosure obligation when selling your home; potential fines and a LADBS correction notice; and rejection of your federal 30C tax credit filing. LED Guys pulls all permits before work begins — every time, no exceptions.
Why does address lookup help?
The address lookup queries public property records to retrieve your home's square footage, year built, and other details. This saves you from having to find this information manually and reduces input errors. The data is pulled using publicly available assessor records for California properties. The tool uses this to pre-fill the square footage field, which determines your NEC general lighting load. Jorge will verify all measurements during the free on-site estimate.
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Certified by Tesla Energy for Wall Connector and Powerwall

The Tesla Energy Certified Installer designation identifies professionals who have completed Tesla Energy training, hold deep technical knowledge of Tesla Energy products, and deliver the highest-quality installations for Tesla customers. LED Guys holds this certification for both product lines — a combination very few Los Angeles electricians can offer.

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Wall Connector Certified Installer

LED Guys is certified by Tesla Energy to install the Tesla Wall Connector and Universal Wall Connector to Tesla's own installation standards. That certification covers the full scope of a residential or commercial Wall Connector project: conductor sizing per NEC Article 625, dedicated circuit breaker selection, conduit and wire routing, GFCI breaker protection per NEC 625.54, and proper grounding and bonding at the panel.

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The Wall Connector delivers up to 48 amps on a 60-amp circuit, the fastest Level 2 charging Tesla offers for home use. Its built-in amperage adjustment (12, 16, 24, 32, 40, or 48 amps) means it works with any panel — from a 100-amp service with limited headroom to a 400-amp commercial main. Tesla's NACS connector is now the North American charging standard (SAE J3400), so the Wall Connector charges Teslas natively and other EV brands via adapter or native NACS port. The Universal Wall Connector adds a built-in J1772 connector for households with mixed EV brands.

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Certified for Tesla Powerwall home battery installations — whole-home backup, Backup Gateway integration, solar coordination, and Charge on Solar setup so your Tesla charges from excess solar production automatically.

Powerwall installations include gateway wiring, backup circuit selection based on your household's critical loads, and utility interconnection paperwork for LADWP net metering. Jorge configures Storm Watch, self-consumption mode, and time-based control through the Tesla app so your system responds automatically to grid conditions and rate schedules.


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When a project calls for custom-fabricated LED lighting — a coffered ceiling with built-in linear channels, back-lit niches, under-cabinet strip lighting with dimmer controls, or a commercial lobby with signature pendant fixtures — Jorge sources components from GlowbackLED and installs them to their technical specifications. Every GlowbackLED installation includes proper driver placement, dimmer compatibility verification, and clean concealed wiring so the finished result matches the design intent.

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