Nightvolt Astro Power Planner

Nightvolt is a power planning desk for portable astrophotography. Add the equipment in your rig—mount, cooled camera, computer, dew bands and other loads—with each item's rated watts and expected active time. Enter your battery's watt-hours, an efficiency assumption, reserve and planned session length. Nightvolt calculates usable energy, average draw, night demand, estimated runtime and headroom from those entries. Mark optional equipment and switch between the full rig and essential-only profile to see the effect on estimated runtime. Save multiple named rigs on your device. A real, one-page PDF field sheet includes the source, loads, both profiles and the calculation assumptions for your bag or observing partner. This is an estimate, not live monitoring or an electrical safety certification. Nightvolt does not connect to a battery or telescope, read device current, forecast weather, or model temperature, battery aging, discharge curves, connectors or peak current. Verify specifications and follow equipment manuals. One purchase includes the complete offline iPhone and iPad app. No account, subscription, ads, analytics, tracking, cloud sync or developer-operated upload. Files leave the app only when you use the iOS share controls.