Battery Runtime Calculator
Estimate usable battery energy, runtime, and DC current from bank voltage, amp-hours, usable depth of discharge, efficiency, and load.
Open calculator →Power Systems Calculators
Battery, solar, and distributed-power sizing calculators for energy storage, runtime, and renewable generation planning.
Every calculator below is a focused interface over an existing Neutron STEM Lab engineering engine. Use the standalone route for a fast result, then move into the linked workbench when the calculation becomes part of a larger design or simulation.
Solar Array Size Calculator
Estimate PV array wattage, panel count, daily harvest, and charge-controller current from daily energy and solar resource assumptions.
Open calculator →Continue into the full engineering workbenches
The standalone calculators are intentionally narrow. These linked workbenches use the same underlying engines while adding broader analysis, simulation, comparison, and design workflows.
DIY Power System
Plan, simulate, document, and export a small off-grid, backup, mobile, workshop, or experimental power system from one shared load list: compare 12 V/24 V/48 V/higher-voltage DC architectures; screen selected equipment against calculated requirements; build a project BOM and printable engineering report; size batteries, inverter, solar, PV strings/MPPT, DC wiring and distribution; model battery aging/temperature/Peukert effects; simulate hourly through 365-day PV, battery, grid/shore, and generator dispatch including measured CSV profiles; optimize bounded design scenarios; project multi-year reliability/lifecycle costs; and transfer synchronized engineering values into compatible Electrical, Electronics, and Control workbenches.