Why EZ Watts?
Everything you need to master your power
Stop guessing how long your battery will last. EZ Watts gives you precise, real-time insights with zero complexity.
Power Station Management
Choose from a curated database of popular power stations or create custom profiles for any battery setup.
Real-Time Battery Estimates
Instantly see whether you have a power surplus or a looming deficit as you add devices and usage times.
Efficiency Loss Calculations
Accounts for AC, DC, and USB efficiency losses so your battery projections are more accurate.
Depth of Discharge
Factors in your battery's DoD to protect battery health and give you realistic usable capacity.
Smart Optimization Tips
Get actionable advice to extend your battery life and make the most of your available power.
Intuitive Interface
Beautiful theme-aware design with light and dark mode, easy-to-use sliders, and clear visual feedback.
Video Showcase
EZ Watts Explainer
Introducing EZ Watts for iOS and Android
App Preview
See EZ Watts in action
A beautiful, intuitive interface that makes off-grid power management effortless.
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Powerful Tools
A comprehensive suite for energy planning
EZ watts is more than just a battery projection calculator... dive into tools designed to empower every aspect of your offline power setup.
Power Capacity Planner
Plan your entire power system, from battery capacity to inverter and surge requirements, ensuring you have the right gear for every adventure.
Wire Gauge Calculator
Ensure safety and optimal performance with precise wire sizing for both simple hookups and complex DC circuits, factoring in voltage drop.
Solar Capacity Calculator
Determine the solar panel wattage (and battery capacity) you need based on your daily power consumption, sun hours, and system efficiency.
Solar Wiring Calculator
Provides safe wire sizing (and minimum voltage drop recommendations) for DIY solar panel installations - accounting for different voltage and battery chemistries.
Simple Electrical Conversion
Convert between Watt-hours, Amp-hours and Kilowatt-hours for 12v, 24v and 48v.
Advanced Electrical Conversion
Effortlessly convert between Watt-hours, Amp-hours, Kilowatt-hours, and perform advanced conversions for DC, single-phase, and three-phase AC circuits.
About
Meet the Creator

If you’ve ever stared at a power station and wondered, “Can I run all this gear at the same time — and for how long?”… you’re not alone. I’ve been there more times than I can count. Whether it’s trying to keep a fridge running overnight, squeezing in a quick coffee in the morning, or making sure a heater doesn’t drain everything before sunrise — off-grid power is always a balancing act.
That’s exactly why I built EZ Watts.
I didn’t set out to create an app at first. I was just trying to solve a problem I kept running into during my own van life setup. Every time I added a new device or changed how long I used something, I had to mentally juggle watts, hours, and battery capacity. And honestly? It got old fast. I wanted a simple way to know, not guess.
So I created a tool that does exactly that.
With EZ Watts, the process is simple. I select my power station — whether it’s something from a major brand or a custom setup — and then I add the devices I plan to use. Maybe it’s a 12V fridge running all day, a USB fan for a few hours, and a kettle for a quick boil. Then I set my battery level to match what I actually have at that moment.
From there, the app does the heavy lifting.
Hi, my name is Ray and this might be the part I’m most excited about: I built this app myself. Not a big team. Not a company with a huge budget. Just me, solving a problem I cared about.
And now I get to share it with a community that understands exactly why it matters.
If you’re living off-grid, traveling, or just trying to better understand your power setup, I think you’ll find this tool incredibly useful. Give it a try, see how it works for your setup, and let me know what you think. I’m always looking to improve it—and your feedback helps shape what comes next.
Because at the end of the day, this isn’t just an app. It’s a better way to manage your power.
If you're interested in vanlife or would like to see a video tour of the minivan camper conversion, check it out on YouTube:
How It Works
Three simple steps to energy clarity
Add Your Devices
Simply add your devices, specify their wattage and usage time. Choose from presets or create custom entries.
See Your Power Balance
Instantly view your real-time battery balance with accurate runtime estimates factoring in all efficiency losses.
Optimize and Go
Get smart optimization tips, plan your solar and battery setup, and head out with complete confidence.
Get In Touch
We'd love to hear from you
Have a question, found a bug, or want to suggest a feature? Drop us a message and we'll get back to you as soon as possible.
Quick Response
We typically respond within 24-48 hours.
Comprehensive Help
Access our in-app FAQ section and detailed help modals for instant answers.







