Observed arrival · 2026-11-09
OffGridVolts: 60 calculators for off-grid electrics
A free library of calculators for sizing and checking off-grid solar, batteries, inverters, cables, and related systems.
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- For
- Campervan, RV, boat, and cabin electrical planners
- Worth noticing
- Coverage includes Peukert’s law, cold-weather MPPT string voltage checks, airline battery limits, and campsite shore-power calculations.
Field notes
The library is arranged by electrical task, from battery capacity and runtime to solar-panel output, controller sizing, and inverter current draw. Some entries address details that can be easy to miss in system planning, including Peukert’s law for lead-acid batteries and MPPT string voltage in cold conditions. The homepage also includes calculations for campsite hookups and airline battery limits.
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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