East Coast Sun

Ballpark, not a proposal

What could solar save you?

Enter your usage, your city, and your roof. This does the same math I do on the back of a napkin on a first call — then shows you exactly what assumptions it used.

Your details
$

≈ 10,240 kWh/year (after the fixed service charge and HST, at 15.39¢/kWh)

This is a solid ballpark — a real proposal accounts for your roof, shading, panel layout, and whether you've got a big tree next to your chimney. But if this looks worth exploring, get in touch.

Over 25 years, at these assumptions, you could save

$27,309

net of the up-front system cost

System size
9 kW
Year-1 savings
$1,576
Payback
19.1 yr
CO₂ / year
2.8 t
estimated
Estimated system cost (before rebates)$27,000 – $33,750
Estimated annual production10,323 kWh
$0$15k$30k$45k$60kSystem cost $30,150Paid off ~yr 191510152025Year
Cumulative solar savings versus one-time system cost over 25 years. The system pays for itself around year 19.
Assumptions used
  • NB Power rate: 15.39¢/kWh (effective April 14, 2026)
  • Production factor for Fredericton: 1147 kWh per kW/year
  • Orientation derate (South): ×1
  • Cost per watt used: $3.35/W (range $3.00–$3.75)
  • Annual rate increase: 3.0%
  • CO₂ intensity: 0.00027 tonnes per kWh (grid estimate)
  • Net metering: 1:1 retail credit, annual reconciliation

All figures come from src/data/solar-constants.js.

Get a real proposal from Rudi →

How this calculator works

It sizes a system to cover your yearly usage using local production data — roughly 1,133–1,147 kWh per kW of panels per year across New Brunswick, depending on your city — then adjusts for your roof's direction. It values your production at the current NB Power rate under 1:1 net metering, and projects that forward with a modest annual rate increase you can change. Every number is listed in the "Assumptions used" panel, and all of them live in one file (solar-constants.js) that we keep current.

What it can't see: your exact roof, shading from that maple next door, how your panels will lay out, or whether Saint John Energy's different export rate applies to you. That's what a site visit is for.

Like what you see? Let's make it real.

Send me your address and last power bill and I'll pressure-test these numbers against your actual roof.

Get a free estimate