Completely. Everything runs in your browser — importing a file makes no application-server data request and sends no file, usage, or billing data to the application server. The page does intentionally load Cloudflare Web Analytics, so anonymous pageview and bare allowlisted interaction events may reach Cloudflare; those events contain no usage data. When you import data (a file, or the optional "Connect with ConEd" Green Button Connect path, where usage flows from Con Edison directly into your browser tab and is analyzed there, exactly like a downloaded file), the page keeps a private monitoring history in this browser's local storage so it can track what you actually paid vs. the best eligible plan over time: monthly summaries, the bill totals you imported, and the plan facts you declare — never raw hourly data, account identifiers, or credentials. It stays on your device, covers the newest 36 months, and the page's Delete stored data button removes it permanently, on the spot. The only application-server contact on the connect path is a one-time exchange of the authorization code for your access token at the site's /api/gbc/token endpoint (because the app's client secret can't live in a browser) — a request that carries only the code, never usage data; that token is kept only in your tab's session storage — never stored, never logged — and disappears when you close the tab. Your ConEd password is never asked for.

Will switching your ConEd rate plan actually lower your bill?

Q: Is ConEd Time-of-Use worth it?

Time-of-Use charges more for electricity used 8am–midnight and much less midnight–8am. It only saves money if a large share of your usage is overnight (e.g., EV charging). For most homes — where usage peaks in the evening — Time-of-Use costs more, not less. This tool shows you the exact number for your home.

Q: What are the Steady Use and Smart Energy (demand) plans?

These bill on your peak demand in kilowatts (kW) — the most power you draw at once — rather than total kWh. They tend to reward flat, steady loads (heat pumps, always-on homes) and punish spiky ones. This tool derives your peak demand from the interval data to estimate them, something a kWh-only comparison can't do.

Upload your Con Edison usage export and find out — precisely, for your real usage. Most people don't save, and we'll tell you honestly if that's you.

🔒 Your usage and billing contents stay on your device: parsing and analysis run entirely in your browser, and importing a file makes no application-server data request or usage-data upload. The page intentionally sends anonymous pageview and bare allowlisted interaction events to Cloudflare Web Analytics; those events contain no file bytes, readings, bills, identifiers, or credentials. When you import, the page keeps a monitoring history in this browser's local storage — monthly summaries only, never hourly data or identifiers, newest 36 months, deleted permanently with one click. Connecting your ConEd account (when offered below) keeps the data boundary — your interval and billing data flow from ConEd directly into this tab and never touch this site's application server; the only analysis-server contact is a one-time exchange of the authorization code for your access token. If you choose the paid report after it becomes certified, checkout sends only the fixed product and amount to the hosted payment provider, never your usage.

Drop your ConEd Green Button file here — .zip, .csv, or .xml or click to choose a file Upload the .zip as-is — no need to unzip. Both CSV and XML (ESPI) exports work.

I charge an EV at home

Include SmartCharge NY’s published 10¢/kWh incentive for charging midnight–8am in the Time-of-Use estimate. This is a what-if scenario: Con Edison currently says Residential Time-of-Use customers are not eligible for SmartCharge NY, so verify your eligibility before switching.

Your situation — applies ConEd’s published eligibility, enrollment-timing, and lock-in rules to your result. Stays on your device like everything else.

ConEd service area Current plan Meter Months on current plan

Solar / net metering ESCO supplies my power Heat pump

Plan most recently left Months since leaving

Optional history enforces TOU’s one-year minimum and each plan’s 18-month re-enrollment block. Leave a value blank when you do not know it.

How do I get my ConEd file? (about 60 seconds)

Sign in at coned.com and open My Account.
Go to Billing & Usage → Energy Use (or search “Green Button”).
Click Green Button “Download my data”, choose CSV or XML (both work), and pick the widest range (up to ~1 year for the most accurate result).
ConEd emails/gives you a .zip — drop it here as-is, no need to unzip. It never leaves your device.

This tool reads only the file you download yourself, and it never asks for your utility password. The file and its usage contents are not sent to this site's application server; the page's separate Cloudflare Web Analytics beacon may receive only anonymous, bare event names. Prefer not to download anything? The optional Connect with ConEd option above uses ConEd's official Green Button Connect authorization (Share My Data) to pull the same data into this page — same analysis, same data boundary, no password.

How ConEd residential rate plans work

Every Con Edison home is on the Standard (SC1) rate by default. You can switch — but switching only helps if your usage pattern fits the plan. This tool prices your actual usage against each plan so you don't guess.

Is ConEd Time-of-Use worth it?

Time-of-Use charges more for electricity used 8am–midnight and much less midnight–8am. It only saves money if a large share of your usage is overnight (e.g., EV charging). For most homes — where usage peaks in the evening — Time-of-Use costs more, not less. This tool shows you the exact number for your home.

What are the Steady Use and Smart Energy (demand) plans?

These bill on your peak demand in kilowatts (kW) — the most power you draw at once — rather than total kWh. They tend to reward flat, steady loads (heat pumps, always-on homes) and punish spiky ones. This tool derives your peak demand from the interval data to estimate them, something a kWh-only comparison can't do.

Is there a ConEd EV rate?

Not for residential customers — ConEd's EV Time-of-Use rate is commercial-only. This tool prices residential EV homes on the regular plans and can model SmartCharge NY's 10¢/kWh off-peak incentive as an optional what-if. Con Edison currently says Residential Time-of-Use customers are not eligible for the program.

Can anyone switch between these plans?

Mostly, yes — but ConEd attaches real terms to each plan, and this tool applies them to your result: the Steady Use and Smart Energy plans require a smart meter (they bill on peak kW, which only hourly smart-meter data can show); Time-of-Use carries a one-year commitment (ESCO-supplied homes exempt) and an 18-month wait before you can rejoin after leaving; both demand plans can be cancelled anytime but carry the same 18-month re-enrollment block; and ConEd steers solar / net-metering homes away from the demand plans. Switches take effect with a future meter read — typically 1–2 billing cycles.

What is free, and what is the paid report?

The free result always shows the current-plan verdict, a conservative annual savings range, confidence warnings, and the no-savings answer when no eligible switch is meaningful. A one-time $29 self-service report is offered only when the conservative end of the projected first-year savings range exceeds $150. It adds the complete plan comparison, month-by-month counterfactual charges, eligibility and lock-in terms, and step-by-step switching guidance. This deployment's checkout remains unavailable until the accuracy backtest and payment provider are certified. When enabled, card details go directly to the hosted payment provider; usage data stays in this browser.

Is my data private?

Completely. Everything runs in your browser — importing a file makes no application-server data request and sends no file, usage, or billing data to the application server. The page intentionally uses Cloudflare Web Analytics, so anonymous pageview and bare allowlisted interaction events may reach Cloudflare; those events contain no usage data. When you import data (a file, or the optional Connect with ConEd path — Green Button Connect — where usage flows from Con Edison directly into your browser tab and is analyzed there, exactly like a downloaded file), the page keeps a private monitoring history in this browser's local storage so it can answer the long-run questions: what you actually paid vs. the best eligible plan, month over month. That history holds monthly summaries, the bill totals you imported, and the plan facts you declare — never raw hourly data, account identifiers, or credentials — it covers the newest 36 months, it never leaves your device, and Delete stored data in the Monitoring section removes it permanently, on the spot. The only application-server contact on the connect path is the one-time exchange of the authorization code for your access token at this site's /api/gbc/token endpoint — the app's client secret can't live in a browser — and that request carries only the code and redirect URI: your interval and billing data never touch this site's server. The token is kept only in your tab's session storage, never stored or logged, gone when you close the tab. Your ConEd password is never asked for. The full data-handling boundary (what each component sees, processes, and retains) is documented in the repo under docs/notes/gbc-data-boundary.md and docs/notes/monitoring-data-retention.md.