Section
Category: Power
Supplies, batteries, and inverters: ratings that survive temperature, not just the nameplate.
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Lithium-ion, LiFePO4, and lead-acid: which chemistry fits the job
Energy density, cycle life, charging, and what happens when a cell is crushed or overcharged are the buying criteria. The word “rechargeable” is not one of them.
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Grid-tie, off-grid, and hybrid inverters in plain language
A grid-tie inverter sells power back to the utility and stops when the grid stops. Off-grid runs from batteries. Hybrid can do some of both. The wiring and the permit follow that choice.
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How to read a switching power supply before you mount it
Wattage on the label is not the specification. Voltage, current, derating, hold-up, and isolation decide whether the supply survives the cabinet.