Private home energy planner
See where your energy really goes.
Connect bills, meters, appliances, tariffs, heating, solar and upgrades. All data stays on your device.
1,37 PLNall-in kWh
38%self-use
590 kWhlatest period
🔒 Bill and meter data never leaves your browser.
Local · no account
Your energy profile
Last update: · v
Summary
All rates and parameters come from your data.
Consumption between readings
Latest bill
Meter log
A lower reading is flagged and requires checking meter replacement or correction.
| Date | Meter | Reading | Usage | kWh/day |
|---|
Bill analyzer
The all-in rate contains all charges. The marginal rate excludes fixed charges.
| Period | Dates | kWh | Total | PLN/kWh cał. | PLN/kWh zm. |
|---|
Appliance inventory
Prefer measurement, then manufacturer data, and only then an estimate.
| Appliance | kWh/mies. | Cost/month | Readingdby kWh |
|---|
Tariff comparison
Enter rates from a specific tariff and validity period.
Energy scenarios
These are supporting estimates, not system sizing or an economic guarantee.
Solar
Battery storage
EV charging
Upgrades
Comparison uses your costs, savings, lifetime and discount rate.
| Modernizacja | Inwestycja | Net saving | Payback years | NPV |
|---|
Backup and export
IndexedDB is not a backup. Regularly download a ZIP or encrypted backup.
Date and reports
Readings and bills CSV, JSON, ICS and a printable PDF report.
Full backup
The ZIP contains project data, CSV and a reminder. JSON import opens a project.
Encrypted backup
PBKDF2-HMAC-SHA-256 + AES-256-GCM. The password cannot be recovered.
One source of truth
Every number has a source, period and assumption.
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Bills
Separate fixed and variable charges and calculate the real all-in kWh rate.
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Meters and CSV
Record readings, import intervals and detect gaps or unusual growth.
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Home scenarios
Compare heating, solar, battery, EV and upgrades with your own rates.
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Privacy
No account, backend or document uploads. Backups can be encrypted.
⚙️
Transparent formulas
Results show rates, efficiency and period instead of hidden magic.
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Offline and PWA
Saved projects and core calculations work without a connection.
REKLAMA · miejsce zarezerwowane poza narzędziem
SEO + wiedza
Guides from bills to home upgrades.
EnergiaTo
How to read an electricity bill
Charges, periods and readings without guesswork.
EnergiaToEnergy supply vs distribution
Why a bill contains several different types of charges.
EnergiaToFixed and variable energy charges
What saving one kWh changes and what it does not.
EnergiaToHow to calculate the real kWh cost
All-in rate, marginal rate and when to use each.
EnergiaToHow to track meter readings
Dates, corrections, replacements and data consistency.
EnergiaToMonthly energy analysis
How to compare periods of different lengths.