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Solar Battery
& Backup

Solar batteries store the energy generated by your solar panels.
Shop the best solar battery and backup brands like Crown, Fullriver, LG, Enphase, and more.

Solar Battery
& Backup

Solar batteries store the energy generated by your solar panels.
Shop the best solar battery and backup brands like Crown, Fullriver, LG, Enphase, and more.

Save Time & Money with your
FREE Battery Guide

Our free Solar Battery Guide will help you learn how to choose the right batteries for your storage-based solar system. With a comparison of battery types, battery bank sizing tips and more, everything you need to know about adding batteries to your solar system is right here in this guide.
Download FREE Guide

Save Time & Money with your
FREE Battery Guide

Our free Solar Battery Guide will help you learn how to choose the right batteries for your storage-based solar system. With a comparison of battery types, battery bank sizing tips and more, everything you need to know about adding batteries to your solar system is right here in this guide.
Download FREE Guide

Questions? Chat with us!

Wil has been a part of the solar industry for over 20 years; as an electrician, solar installer, support technician, and more. He's also been living off-grid since 1996. Wil and the rest of the Unbound Solar team are here to answer any questions you have about designing a system that will fit your needs.
Give us a call—we’re here to help.

The Do-It-Your-Way Solar Guide

We answer all your questions in one easy-to-navigate Do-It-Your-Way Solar Hub. Ready for total control with more choices and faster payback?

Deep Cycle Batteries 101

Today’s solar batteries are better than ever. So are the devices that regulate and protect them. But you still need to do your homework to make sure you get the best solar battery storage solution for your needs.

There are two main kinds of deep cycle batteries: lead acid and lithium. Lead acid batteries have a lower upfront cost, while lithium batteries have the longest lifespan. Flooded lead acid batteries require maintenance, and more expensive sealed lead acid batteries are maintenance free.

Batteries are the primary storage source for off-grid systems, but they also work as an emergency backup power source for grid-tied systems. Installing a grid-tied system with a solar battery backup also gives you the option to sell excess stored power back to the utility company at a later time.

We use deep cycle batteries to store power generated by solar panels, but they have plenty of other applications. Small electric vehicles and industrial equipment like forklifts, floor cleaners, scissor lifts, and golf carts are also powered by deep cycle batteries.

For more in-depth info on batteries, be sure to read our battery basics and battery maintenance pages

FREE Solar Battery Guide

Battery Types

Lead Acid Battery Bank

Flooded lead Acid

  • Lowest upfront cost $$$$
  • Typical lifespan: 5-7 years
  • Requires maintenance

Lead acid batteries represent a tried and true technology that has been around for years. Flooded lead acid batteries have the lowest upfront cost, but the tradeoff comes in the form of maintenance — every month you’ll need to check the water level, adding distilled water to keep them topped off. These batteries expel built-up hydrogen gas, so they need to be installed in a vented enclosure. They also need periodic equalize charges.

Shop Lead Acid

Sealed Lead Acid Battery Bank

Sealed Lead Acid

  • More Expensive $$$$
  • Typical lifespan: 3-5 years
  • Maintenance-free

Sealed lead acid batteries are a variation of lead acid that eliminates the maintenance. But these come at a higher price and usually a slightly shorter lifespan. There are a few types of sealed lead acid batteries – gel and absorbent glass mat (AGM.) There are some differences in battery construction, but generally speaking, both types are used in off-grid solar and have similar benefits.


Shop Sealed Batteries

Lithium Battery Bank

Lithium

  • Highest upfront cost $$$$
  • Typical lifespan: 10+ years
  • Maintenance-free

Lithium batteries are the most efficient. They waste significantly less power in the charge/discharge process. They can also be cycled deeper, using more of their capacity. Lithium batteries come in different types. The off-grid batteries we use are called Lithium Ferro Phosphate (LiFePO4, commonly called “LFP”). The long lifespan and high charge/discharge rates make LFP batteries the ideal solution for off-grid systems

Shop Lithium

Shop All Solar Batteries for sale and compare pricing and specs.


Complete Solar Power System

Looking for a complete system?

Deep cycle batteries store extra solar power, essentially turning your home into your own power company. If you’re looking at batteries, chances are you also need a complete off-grid system, including solar panels, racking, a power center and more.

You’ll need several batteries to support a full-scale system. So we’ve taken the time to put together 12, 24 and 48 – volt battery banks specifically designed to work with our off-grid systems.

Still not sure what kind of system you’re looking for? Get our FREE Getting Started Guide. It covers all the basics of solar power. If you already know off-grid is your thing, check out the links below to size up the right batteries for your system.

Download Our Solar Battery Guide

A poorly designed system can ruin your batteries. Our Solar Battery Guide will help you size your battery bank properly and keep things running smoothly.