Design your power system without the guesswork.
Tell us what you plan to plug in. We calculate the exact battery, solar panels, and inverter your camper or mobile home needs — in plain English.
Built for the journey — since ancient times.
The Vikings sailed without solar panels. You don't have to. Whether you're heading for the fjord, the mountains or the campsite — Kraftur helps you size a system that keeps the power on all the way home.
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List your gear. Pick from common appliances or add your own.
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Set daily hours. Estimate how long each item runs per day.
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Get your blueprint. We size battery, solar, and inverter instantly.
No Vikings were harmed during this configuration.
Focused tools for off-grid
Smart calculators and comparisons that do the job — without needless complexity.
Planner
List your appliances or pick components — get a battery, solar panels and an inverter that work together.
Analysis & comparison
Compare products side by side — specs, power and weight.
Cable sizing
Work out the right cable cross-section for DC and AC. Voltage drop, current rating and fuse suggestions.
Learn how your power system actually works.
Explanations without the engineering jargon — C-rates, sun hours, battery life and the difference between DC and AC. For those who want to understand, not just follow.
Built in our spare time. Built to be shared.
Kraftur is a spare-time project by two enthusiasts who care about energy, systems and teaching — built to help more people understand their power systems.
The calculations are guidelines and do not replace planning by a qualified installer. Read more.