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Ubify Media & Design Operations
UI/UX & DIGITAL MEDIA SPECIALISTS
About This Tool
Homeowners and solar installers review annual true-up bills to verify whether grid exports balance seasonal household electricity consumption. Real-world utility billing tariffs (such as California NEM 2.0 or NEM 3.0 net billing tariffs) aggregate 12 consecutive months of interval energy meter data, offsetting peak kilowatt-hour generation against off-peak grid power imports using avoided cost rate schedules. This web calculator implements a simplified client-side 3-factor proportional model, generating comparative power metrics from your entered generation figures with zero server telemetry.
How to Use
- 1
Enter your annual solar system kilowatt-hour output or primary electricity figure.
- 2
Specify the utility energy tariff rate multiplier in the second input field.
- 3
Set your safety margin or grid interconnection reserve coefficient (minimum divisor 0.01).
- 4
Examine the calculated billing index, geometric root value, and power self-consumption percentage.
Frequently Asked Questions
How is the annual billing index determined?
The tool calculates output = (solar output × tariff rate) / max(0.01, reserve coefficient), together with root mean sqrt(output × rate) and consumption ratio (output / (output + rate)) × 100.
Does this calculator import hourly smart meter green button records?
No. This page uses a 3-field numerical estimator rather than ingesting granular 15-minute interval smart meter XML or CSV files.
Are your home electric bill numbers uploaded to any server?
No. The script runs entirely in local browser memory without transmitting electric utility data.