Build your power plan around the energy you use. Practical guides and calculators help you connect batteries, solar charging and protected wiring for RV, marine and off-grid systems.
Four tools. One connected system.
Start with daily energy use, then work through storage, charging and wiring. Each calculator is a planning aid with visible assumptions.
Size your battery bank
Turn daily watt-hours and reserve days into a capacity estimate.
Estimate battery runtime
Check how long a chosen battery may support a steady load.
Plan your solar array
Estimate panel wattage from daily energy use and available sun.
Check 12V voltage drop
Compare current and cable length with a voltage-drop target. Ampacity needs a separate check.
Different trips. The same planning discipline.
The energy balance is a useful starting point in every setting. Installation requirements depend on the equipment and where it is used.
RV & camper
Balance overnight loads, off-grid days and the time available for solar, alternator or shore charging.
Marine
Separate house and starting needs. Account for wet locations, corrosion and the marine standards that apply.
Off-grid
Plan for seasonal sun, longer autonomy and backup charging. Check the rules for a fixed installation.
The essential planning guides
Read the context behind the numbers before choosing equipment or installing a system.
Size an RV battery bank
Build a load audit, choose autonomy and check peak current.
Choose a lithium battery
Compare usable energy, BMS limits and charging compatibility.
Work out your solar needs
Connect daily demand with realistic seasonal charging.
Plan safer 12V wiring
Calculate round-trip voltage drop and verify protection.