EZ Watts
Smart Power Management

Take Charge of Your Power

The ultimate mobile companion for off-grid adventurers, RV enthusiasts, and van dwellers. Transform complex power calculations into effortless insights.

Download on App Store and Google Play
Free to Download
No Account Required
EZ Watts App

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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Dashboard TEST

Power Selector

Find your power station

Device Manager screenshot

Device Manager

Add and edit your devices

Converter screenshot

Dashboard

Manage everything here

Solar Calculator screenshot

Solar Calculator

Plan your solar panel needs

Wire Calculator screenshot

Conversions

Advanced Electrical Conversions

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

Ray standing in front of his minivan camper

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:

Ready to take charge of your power?

Whether you're planning your next off-grid expedition, preparing for emergencies, or optimizing your mobile workspace - EZ Watts provides the clarity and confidence you need.

Download on App Store and Google Play

How It Works

Three simple steps to energy clarity

01

Add Your Devices

Simply add your devices, specify their wattage and usage time. Choose from presets or create custom entries.

02

See Your Power Balance

Instantly view your real-time battery balance with accurate runtime estimates factoring in all efficiency losses.

03

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.