Battery charging and power guides
Thirty years of installing chargers, inverters and solar on everything from wheelchairs to mine equipment, written down in plain English. No affiliate filler, no sponsored picks.
How 3-stage battery charging works
What bulk, absorption and float actually do, the target voltages for flooded, AGM and gel batteries, and how long a recharge really takes.
Read the guidehow to size a battery chargerHow to size a battery charger
Pick the right charger in four steps: match system voltage, choose amps from amp-hour capacity, confirm the charge profile, then check the connector.
Read the guidehow to size a pure sine inverterSizing a pure sine inverter and battery bank
Continuous vs surge watts, real surge factors for motors and appliances, the watts-to-amps math, and how big your battery bank needs to be.
Read the guidesizing a solar battery chargerSizing a small solar battery charger
Work out daily amp-hours, pick panel wattage, decide whether you need a controller, and size the battery with a real-world worked example.
Read the guidedc to dc converterDC-DC converters explained
When to buck or boost a DC rail, why isolation matters in military and marine systems, and why tapping one battery in a series string is a mistake.
Read the guideagm vs gel battery chargingAGM, gel and flooded: charging profiles that fit
How the three lead-acid chemistries differ, why gel needs a lower voltage ceiling, how sulfation starts, and what actually reverses it.
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