3 free tools
Solar & Energy tools built for real work
Energy calculators for battery backup, electricity savings and inverter/load planning with explicit efficiency assumptions. Every tool is designed to expose its inputs and outputs clearly instead of hiding the logic behind a vague score.
☀Battery Backup Runtime CalculatorEstimate battery backup runtime from battery-bank voltage and amp-hours, usable depth of discharge, system efficiency and average load.→☀Electricity Bill Savings CalculatorEstimate electricity bill savings from reduced grid consumption and exported energy using user-supplied tariff, export credit and fixed charges.→☀Inverter Capacity CalculatorEstimate inverter continuous watt/VA capacity and surge requirement from simultaneous loads, headroom and power-factor assumptions.→
Why ToolboxKart Solar & Energy tools?
Fast interfaces, plain-language explanations, mobile-friendly layouts and no unnecessary account wall for the utilities in this release.
Tool first
The working interface appears before long-form SEO content, so you can finish the task quickly.
Transparent logic
Calculators disclose formulas or assumptions where they matter, and analyzers avoid pretending subjective checks are scientific facts.
Reusable results
Copyable output and clean formatting are included where they improve the workflow.