Practical guides with worked examples and practice problems. Each one links to the calculator that does the maths for you.
Rack kW, PUE, cooling load, yearly energy and cost, with worked examples and practice problems.
Solar & StorageWork out panels, battery kWh and inverter size from your electricity bill.
Components, MW vs MWh, C-rate, efficiency, sizing examples and safety.
BatteriesWhy a 10,000 mAh bank never delivers 10,000 mAh, and how many charges you really get.
FundamentalsRMS, frequency, why the grid uses AC, and how chargers and inverters convert between them.
FundamentalsWatts vs kWh, appliance current, running cost and battery runtime.
FundamentalsResistor and battery formulas with practical, mixed-network examples.
FundamentalsThe V = IR formula, the triangle, worked examples and practice problems.