48V Battery Voltage Charge: Why Do Batteries Die? - ShopSolar.com
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48V Battery Voltage Chart

Short on Time? Here’s The Article Summary

The article from Shop Solar Kits introduces the 48V battery voltage chart to help understand battery capacity and how it relates to powering homes with solar energy. It explains that as a battery's charge depletes, its voltage output decreases. The chart provides voltage percentages corresponding to different battery charge levels.

For solar power, battery capacity is crucial for storing energy generated by solar panels. The panels convert sunlight into electrical energy, which is stored in batteries through an inverter. The article emphasizes not using batteries beyond 50% capacity to prevent degradation. To power homes completely with solar, understanding battery voltage charts helps determine the minimum voltage batteries needed to store solar energy. Deep cycle solar batteries are recommended for frequent charging and discharging, with lithium batteries being a newer, longer-lasting option. Choosing the right inverter is also crucial for efficient energy use.


Here at Shop Solar Kits, we’re on a mission to make solar simple. Our 48V battery voltage chart was created so that you can understand the power your batteries pack, and what they can and can’t power. 

We’ve included a brief explanation to help you understand battery capacity, and how you can power your home with solar.

What Is a Battery Voltage Chart?

A lithium-ion battery voltage chart explains a battery’s voltage capacity compared to its charge. 

48v battery full charge voltage chart

Interestingly, a battery actually has a higher voltage capacity at full charge than the advertised battery. For example, a 12V battery will have a capacity of around 14.6V when it’s fully charged.

As the charge depletes, the voltage output of the battery gets a bit lower. The battery will have a voltage output closer to the advertised output as its charge decreases.

48V Battery Percentage Chart

As explained above, the 48V battery percentage chart shows you the voltage output capacity of a 48V battery in relation to its current charge. The voltage output is based on the battery having zero load attached to it. 

This means there is nothing currently attached to it that can draw power out of the battery. Have a look at the chart below to see how a battery’s capacity changes as it loses charge.




100% (charging)


100% (resting - not on charge)

















Learn More About Battery Capacity

In terms of solar power, battery capacity is important if you’re using solar to power your home. Your solar panels are responsible for trapping the sun’s energy, and they do this using photovoltaic cells. 

48v battery charge chart

This energy then creates an electrical charge that moves in response to an electrical charge inside the panel. This creates electricity. But how does that electricity get to your appliances to power them?

Your panels need to be connected to an inverter through installed wires, and your inverter stores this power in batteries inside it. The power can’t move directly from your panels to your appliances for a few reasons.

Firstly, and most importantly, you need to store the power generated by your panels so that you can use it when the sun isn’t shining. If this didn’t happen, you’d only be able to use the power generated during daylight hours.

Secondly, your inverter converts the power to the correct format for your appliances and releases it without causing any power surges. It’s safer and more regulated. Our solar panel voltage chart can help you understand this better.

The capacity of your battery dictates how much power you can store and use. The bigger your battery’s capacity, the higher your chances are of being able to go completely off-grid.

You also need to keep in mind that you shouldn’t use your battery beyond 50% of its capacity. This causes it to degrade over time, meaning you’ll need to replace your batteries more often, and this can get expensive.

Power Your Home with Solar

48v battery chart

If you’re looking to power your home completely with solar, understanding battery voltage charts is the first place to start looking. They can give you an understanding of how much voltage a battery can supply as its charge depletes.

This is useful because once you’ve calculated the voltage needed to power your home, you can establish the minimum voltage batteries needed to store the power your panels create. 

If you don’t think 48V batteries are going to work for you, have a look at our 52V battery voltage chart. These might be a better fit for your needs. 

If you only want to power a few things in your RV or while you’re camping, the 6V battery voltage chart or our 24V battery voltage chart might be what you’re looking for.

Deep Cycle Solar Batteries

If you’re going to be using and recharging your batteries often because you have a lot of appliances to power, deep cycle solar batteries are for you. 

Deep-cycle solar batteries are designed to handle repeated charging and discharging at a rapid rate. The difference between a deep cycle battery and a regular battery is that while a deep cycle battery can handle bigger loads over a longer period of time, regular batteries can handle bigger initial needs.

The best comparison battery to use to understand the difference is a car battery. A car needs quite a lot of power to start, and a regular battery can handle this. It provides short bursts of energy. Deep cycle batteries can’t provide this surge of power, but they can provide power for longer periods of time.

Deep cycle batteries are available in 48V options, so the above table will help you understand how they’ll deplete over time. The newest deep-cycle solar batteries are lithium batteries, but previously you could get flooded lead batteries or seal lead acid batteries.

The newer lithium batteries last twice as long, weigh much less and require little to no maintenance.

It’s also important to choose the right inverter for your needs. Get in touch with us if you need some help choosing the right inverter for your 48V deep cycle batteries.

We’re always happy to help! You can reach us at 1-877-242-2792, and we’ll let you know what your best options are, taking your budget into account.

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Article by

Cody Oehm

Cody is the Head of Marketing at Shop Solar, and joined the company in spring of 2022. 

He has an entrepreneurial background and has been in the ecommerce industry since 2015. With 4 businesses under his belt and a drive to make a bigger impact, he decided to team up with Shop Solar on their mission to make solar simple and affordable. You can browse best seller's here.

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