Camp Power Calc helps you figure out how big a battery, solar panel, and inverter you actually need for off-grid camping and van life. It goes through your real appliance list โ fridge, lights, phone, heater โ and shows the watt-hours, not just a single number. No login, runs entirely in the browser.
Purpose-Built for Camping/RV Use
The tool is specifically designed to help campers and RV owners calculate their power needs, making it more relevant and tailored than generic power calculators.
Free to Use
As an online calculator, it appears to be freely accessible without requiring payment, making it easy for anyone planning a camping trip to estimate their power requirements.
Helps with Trip Planning
By calculating power needs in advance, users can better prepare their battery systems, solar panels, or generators before heading out, reducing the risk of running out of power during their trip.
Accessible Online
Being a web-based tool, it can be accessed from any device with internet access, including smartphones, making it convenient to use while planning or even during a trip.
Simplifies Complex Calculations
Power consumption calculations for multiple appliances and devices can be complex; the tool automates this process, saving users time and reducing calculation errors.
Because it's built by someone who actually camps off-grid. The appliance library comes from real gear lists (not marketing specs), the output shows watt-hours per device (not just a total), and you can tweak individual items to see how adding a 12V fridge or swapping LED bulbs changes your battery needs. No signup, no app download, no email capture โ open the page, run the numbers, done.
Most camping power calculators give you a single "you need X Ah" number and stop there. CampPowerCalc breaks it down by appliance โ fridge, lights, phone charger, heater โ so you can see exactly what's drawing power, adjust the list, and understand the tradeoffs. It supports 6 languages, runs entirely in your browser with no server upload, and is built from real van life and RV camper feedback rather than generic assumptions.
Van lifers, RV owners, overlanders, and car campers who are planning or upgrading their off-grid electrical setup. Also useful for pre-purchase research โ figuring out whether a 100Ah battery or 200W solar panel actually covers their real load before buying gear.
I built it after spending weeks reading Reddit threads (r/vandwellers, r/overlanding) and forum posts where people kept asking the same question: "How big a battery do I really need?" Every answer was either a spreadsheet link or a vague "it depends." CampPowerCalc turns that spreadsheet into an interactive tool that walks through your actual appliance list and shows the math.
Vanilla JavaScript with a static frontend hosted on Cloudflare Pages. No backend, no database, no user accounts โ all calculation happens locally in the browser. The site uses next-intl for 6-language support (English, German, French, Spanish, Japanese, Chinese) with hand-written native translations.
Van conversion DIYers Overland vehicle builders RV campers planning boondocking trips Outdoor gear reviewers sizing power setups Pre-purchase researchers comparing battery/solar configurations
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Check the traffic stats of CampPowerCalc on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
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