--- title: How Many Enphase Batteries Should I Get? description: This article will discuss the Enphase batteries we offer, as well as outline the process for determining how many Enphase batteries you need.  --- [Skip to content](https://knowledge.projectsolar.com/migration/how-many-enphase-batteries-should-i-get#main-content) English Show submenu for translations ![project solar logo - for light bg.png\]](https://knowledge.projectsolar.com/hs-fs/hubfs/project%20solar%20logo%20-%20for%20light%20bg.png?height=20&name=project%20solar%20logo%20-%20for%20light%20bg.png) Open main navigation Close main navigation - English Show submenu for translations - projectsolar.com projectsolar.com Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [FAQ](https://knowledge.projectsolar.com/migration?hsLang=en) 2. [Custom Solar Projects](https://knowledge.projectsolar.com/migration/custom-solar-projects?hsLang=en) # How Many Enphase Batteries Should I Get? ## This article will discuss the Enphase batteries we offer, as well as outline the process for determining how many Enphase batteries you need. If you plan to include backup in your home solar system, you may be wondering how many batteries you should purchase. Here, we'll briefly explain battery capacity and show you how you can use Enphase's [online estimator](https://estimator.enphase.com/v3) to quickly size a battery system that will suit your needs.   ### How Much Does a Solar Battery Back Up? Project Solar offers Enphase's IQ 5P batteries, which have a 5.0kWh capacity. Each battery can power 15.9 amps, which means they are commonly connected to a 15-20A breaker. While some customers do opt for full-home backup, a single battery usually can't back up an entire home for an extended period. Instead, batteries can be configured to back up essential circuits (lights, refrigerators, Wi-Fi routers, etc.), or multiple batteries may be purchased to provide more capacity. Enphase battery systems are expandable: you can add multiple batteries to your system or add more batteries down the road as needed. It takes some understanding of electricity and a little math to size a battery system perfectly (our team can help), but you can get a good idea of what you need by using Enphase's estimator tool. Check out the section below to learn how to use this tool.   ### The Enphase Estimator Enphase offers a helpful tool--the [Enphase Estimator](https://estimator.enphase.com/v3)--to help you determine how many kWh of batteries would be necessary for your specific circumstances.  To use this resource, simply enter your address, and answer the questions about your home. If you already have a solar quote from Project Solar, you can also enter your system size to increase accuracy. Choose an option for a battery system that fits your needs, and make sure to adjust the calculator based on appliances you want to back up. If you'd like to backup an appliance that isn't listed, you can add it manually. You can refine your results as you wish, and then download your system summary. Once you're done sizing your battery storage system, contact our Customer Experience Team and we can add it to your Project Solar design and contract.   - [Solar Basics](https://knowledge.projectsolar.com/migration/solar-basics?hsLang=en#main-content) - [Solar 101: The Fundamentals](https://knowledge.projectsolar.com/migration/solar-basics?hsLang=en#solar-101-the-fundamentals) - [Solar Insights: Deeper, More Technical Info](https://knowledge.projectsolar.com/migration/solar-basics?hsLang=en#solar-insights-deeper-more-technical-info) - [Custom Solar Projects](https://knowledge.projectsolar.com/migration/custom-solar-projects?hsLang=en#main-content) - [Full Service Install](https://knowledge.projectsolar.com/migration/custom-solar-projects?hsLang=en#full-service-install) - [Financial Information](https://knowledge.projectsolar.com/migration/financial-information?hsLang=en) - [Project Solar Power Bank Products](https://knowledge.projectsolar.com/migration/project-solar-power-bank-products?hsLang=en) - [Additional Info](https://knowledge.projectsolar.com/migration/additional-info?hsLang=en) [![Chill listening crop-3](https://knowledge.projectsolar.com/hs-fs/hubfs/project%20solar%20logo%20-%20for%20light%20bg-1.png?width=201&height=17&name=project%20solar%20logo%20-%20for%20light%20bg-1.png "Chill listening crop-3")](https://projectsolar.com) At Project Solar, we aim to make solar so incredibly easy and affordable that it becomes the financially prudent energy option for all homeowners. Copyright © 2026, Project Solar