Solar Whisper

Solar Whisper is an offline planner for home solar systems. Calculate energy output, estimate load coverage, compare panel configurations, and track maintenance tasks — all on-device, with no internet connection, no account, and no subscription required.
Dashboard

The main screen displays your daily load, solar output, coverage percentage, and estimated monthly savings at a glance. The daily energy balance is calculated automatically based on your active scenario and battery reserve.
Appliance management

Add any household appliance manually by entering its wattage, unit count, and daily runtime. The app calculates the exact daily consumption in kWh for each device. Appliances can be toggled in and out of the calculation with a single tap.
Scenario comparison

Build multiple system configurations and compare them side by side: number of panels, array capacity, peak sun hours, export rate, and battery reserve. Useful for sizing a system before purchasing equipment or for evaluating an upgrade.
Maintenance tracker

A built-in task tracker reminds you of recurring maintenance: rinsing dust from panels, checking inverter status lights, and trimming new shade near the array. Each task shows progress since it was last completed.
Monthly reports

The Reports section consolidates projected consumption, estimated solar production, and net energy balance into a single summary. The app calculates self-consumption savings and suggests a concrete next action.
Privacy and offline use

All data is stored exclusively on the device. A reset restores default appliance presets, seasonal solar configurations, and maintenance intervals without contacting a server. The app is fully functional without an internet connection.