Plan My Panel

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Panel capacity

Peak recorded load Peak recorded load Highest Main watts ever seen — from the in-memory accumulator this hour and the SQLite history of all previous sessions. Only ever climbs; resets only if the database is cleared. The grey tick marks the NEC 80% continuous-load limit (24,000 W), above which sustained draw is unsafe for a 125 A service. —

0 W 24,000 W — NEC 80% 30,000 W max

Live vs expected Live vs expected Green bar is the current Main draw, updated every second via SSE. The amber marker is the learned baseline — average peak wattage for this same hour of day across all past sessions. Turns amber when live exceeds expected by more than 30%. Shows "learning…" until at least 2 data points exist for this hour. —

0 W — expected 30,000 W max

Circuits Circuit status Live — probe active, reading every second Historical — probe moved, past data preserved Names sync from the Emporia app automatically.

Circuit		Now (W)	Hour max (W)	All-time max (W)

Breaker downgrade advisor

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Live data stream

Whole-home peak — last 7 days

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Your vehicle

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Model

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EV charging headroom

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Generate EV Readiness Report

Create a personalized one-page PDF report that shows whether your panel can safely support an EV charger. Perfect for sharing with electricians.

Current Panel State

Service Amps: —

Current Peak Load: —

Current Usage: —

Add New Load

Remove Existing Load

Your Simulation

No changes yet. Add or remove loads above.

Added: 0A

Removed: 0A

Simulation Results

New Peak Load: —

Percentage of Panel: —

NEC 80% Limit: —

Remaining Headroom: —

0% 80% NEC 100%

Reference: permits, costs & rebates ▸

Permit rules for:

Select a state above to see permit requirements.

Typical Cost Estimates (2025)

New 240V/60A circuit$800 – $2,000

Panel upgrade (125→200A)$3,500 – $6,500

EVSE hardware (48A)$400 – $900 (ChargePoint, Emporia, Wallbox)

Total installed (no upgrade)$1,200 – $3,000

Federal & State Credits

Federal tax credit30% of EVSE + install cost (up to $1,000) — IRS Form 8911

Utility rebatesCheck your utility's website — many offer $500–$1,000 for EVSE installs

Panel upgrade rebatesMany utilities offer $500–$1,500 for service upgrades

Questions to Ask Your Electrician

Panel slotsIs there a free 2-pole slot for a 60A breaker?

Wire runDistance from panel to charging location?

LicenseWhat's your contractor license number? (verify online)

PermitWill you pull the permit, or do I need to?

Results sourced from Google Maps. Always verify license status at your state's contractor licensing board (e.g. cslb.ca.gov in CA) before hiring. Cost estimates are general ranges and will vary by job complexity and region.

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Your panel configuration and preferences are saved per account.

Panel configuration

Timezone

Used for graph time display

Service size

A @ 240V

Main breaker rating — common values: 100 A, 125 A, 200 A

NEC continuous-load limit

NEC Article 220 — sustained loads must not exceed this percentage of service capacity (80% is the code default)

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