Solar Battery Cost (A Complete Breakdown)

You’d be surprised at how little concrete information there is on the internet about solar battery cost.

Type in, “cost of a solar battery“, and you’ll be hit with dozens of unrelated articles — “are solar batteries worth it?”, “how much will storage cost for your PV system?”.

Then, at last! You come across an article that you think will give you the answers you need, only to be hit by a wall, a Tesla Powerwall to be exact. Have a look at the cost of these systems – it doesn’t exactly make for easy reading.

That’s why we’ve put together a cost breakdown (based on our independent research) for solar batteries that are far more accessible and modular.

In this article, you’ll finally get the answers you’ve been longing for!

Foreword
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Solar Battery Cost Breakdown

Before we go any further, it’s important that we provide you with some context to the information shown in the tables below:

In order for us to provide you with the most accurate solar battery cost estimates, we collected data from over 100 different batteries, from the following manufacturers:

  • Renogy
  • Battle Born
  • Ampere Time
  • Relion
  • Trojan
  • AIMS Power
  • Canbat
  • SimpliPhi
  • KiloVault
  • MK/Deka Batteries
  • Concorde Battery
  • Future Solar
  • Crown
  • Sun Xtender
  • Outback Power
Example of a 100Ah Solar Battery.

Additionally, we based the solar battery cost estimates according to ampere hour and voltage.


Our Findings

Based on our research, we discovered the following:

  • There are a number of manufacturers that don’t provide the prices for their batteries online. This makes it difficult for online consumers to compare and contrast prices.
  • The majority of the data that we found related to batteries in the 12V range.

Because of this, we felt it important to focus on 12V Lithium-Iron (LiFePo4), AGM, and GEL batteries.

Technically, we could provide 24V and 48V prices but the sample sizes simply weren’t big enough at those ranges (at least in our books) for us to give you accurate cost estimates. The lack of 24V batteries on the market is actually one of the reasons why many are looking to convert 12V To 24V for better efficiency.

Please Note: We will keep an eye on the market and update this article with 24V and 48V cost estimates in due course. So, stay tuned!

Now, let’s have a look at what we found!

Related Reading: What Can I Run Off A 100Ah Battery?


Average Cost Of Lithium-Iron Batteries (LiFePo4)

Ampere HourVoltageAverage Cost (USD)
50 Ah12V$466.69
100 Ah12V$938.28
200 Ah12V$1448.56
300 Ah12V$2480.38

Average Cost Of AGM Batteries

Ampere HourVoltageAverage Cost
50 Ah12V$226.19
100 Ah12V$371.74
200 Ah12V$762.87

Average Cost Of GEL Batteries

Battery Size (Ah)VoltageAverage Cost
100 Ah12V$446.08
200 Ah12V$1183.33

Solar Battery Manufacturer Cost Comparison

Here you’ll find a cost comparison between a variety of manufacturers.

You’ll notice that we haven’t included all of the manufacturers that we originally listed. Again, this is because some of the data sample sizes were too small, or the company simply doesn’t have batteries available in these sizes.


Average Cost Of Lithium-Iron Batteries (LiFePo4)

ManufacturerBattery Size (Ah)VoltageAverage Cost
Renogy50 Ah12V$529.99
Battle Born50 Ah12V$535.00
Ampere Time50 Ah12V$396.47
AIMS Power50 Ah12V$389.00
Canbat50 Ah12V$433,25
Renogy100 Ah12V$816.65
Battle Born100 Ah12V$1049.00
Ampere Time100 Ah12V$529.99
AIMS Power100 Ah12V$649.00
Canbat100 Ah12V$1052.21
Renogy200 Ah12V$1,299.99
Relion200 Ah12V$1,996.95
Ampere Time200 Ah12V$913.32
AIMS Power200 Ah12V$1270.00
Canbat200 Ah12V$1815.06
Battle Born300 Ah12V$2900.00
Ampere Time300 Ah12V$1139.95
Relion300 Ah12V$2914.95
Kilovault300 Ah12V$2600.00
Canbat300 Ah12V$2446.39

Average Cost Of AGM Batteries

ManufacturerBattery Size (Ah)VoltageAverage Cost
Concorde Battery50 Ah12V$230.00
MK/Deka Batteries50 Ah12V$262.50
Canbat50 Ah12V$145.99
Renogy100 Ah12V$285.32
MK/Deka Batteries100 Ah12V$385.00
Concorde Battery100 Ah12V$430.00
Trojan100 Ah12V$460.00
Canbat100 Ah12V$346.83
Renogy200 Ah12V$439.99
Outback Power200 Ah12V$832.50
MK/Deka Batteries200 Ah12V$845.00
Trojan200 Ah12V$855.00
Concorde Battery200 Ah12V$970.00

Average Cost Of GEL Batteries

ManufacturerBattery Size (Ah)VoltageAverage Cost
Renogy100 Ah12V$376.65
MK/Deka Batteries100 Ah12V$398.33
Trojan100 Ah12V$536.66
Canbat100 Ah12V$525,88
MK/Deka Batteries200 Ah12V$960.00
Trojan200 Ah12V$1,190.00
Future Solar200 Ah12V$1,400.00

What Factors Determine Solar Battery Cost?

Not all batteries are created equal. Yes, we know that’s very cliché but it’s true nonetheless.

So, now that you’ve had a good look at our solar battery cost estimates, let’s dive into the factors that can influence an individual battery’s price point.

Here are some of the factors that determine the cost of a solar battery:

  • Battery manufacturer
  • Battery chemistry
  • Durability
  • Quick charging/discharging
  • Battery capacity

Battery Manufacturer

Any solar-related product’s price tag will depend on the company that manufactures them. This goes for inverters, batteries, panels, EV’s, etc.

This can come down to their manufacturing process, marketing strategy, material cost, and other various overheads.


Battery Chemistry

For those of you who’ve taken a look at the above tables – you may have noticed a significant difference in price relative to the type of battery chemistry/technology.

In this article, we’ve included prices for both lithium-iron (LiFePO4) and lead-acid (AGM & GEL) solar batteries. Out of the 3, LiFePO4 batteries tend to be the most expensive – at least initially. Over time, they actually save you money because they last longer.

To explain this, here’s a brief summary from our article – Lead-Acid vs Lithium-Ion (10 Key Differences):

Levelized Cost Of Storage

The Levelized Cost of Storage (LCOS) is the most appropriate way to compare the cost of different battery technologies. This variable is expressed in USD/kWh and takes into account all of the expenses related to energy storage over the lifespan of a battery.

As batteries are maintenance-free, the only cost you incur is the price of the battery itself. Have a look at the table below

 Lithium-ion 12V, 100AhLead-acid 12V, 100Ah
Upfront cost739.99 USD174.99 USD
Depth of discharge80%50%
Total number of cycles(10 years) – 3600 cycles(2 years) – 700 cycles
Total kWh over lifetime3’456 kWh420 kWh
LCOS0.214 USD/kWh0.417 USD/kWh

As you can see — initially, the price of the lithium-ion battery (LiFePO4) costs 4X more than the lead-acid battery.

However, it lasts much longer and thus it has the lower LCOS. In short, over its lifespan, the lithium battery is two times cheaper than the lead-acid.


Durability

The durability of a battery is another factor that greatly influences solar battery cost.

This metric is rated in the number of cycles (charge/discharge) and in years.

A battery’s tolerance towards intermittent charging/discharging is a good example and indicator of durability.

Why? Solar panels are non-linear generators — their power output varies continuously according to the availability of sunlight irradiation. For instance, a passing cloud can drastically influence power variation (several hundreds of watts).

It stands to reason then that your battery should be ready for such events. Fortunately enough, LiFePo4 batteries can handle power fluctuations rather well.


Quick Charging/Discharging

Batteries that come with quick charging/discharging are naturally more expensive.

Lead-acid batteries don’t support quick charge — this makes them cheaper. Their charging time range from 6 to 15 hours and follow a 3-step process:

  • Bulk charge — charging voltage increases steadily to its maximum value and charging current is kept at its maximum value. The battery will reach up to 80% of its full capacity in approximately 6 to 8 hours.
  • Absorption charge — charging voltage is kept at its maximum value, while the current slowly decreases until the battery is charged at 90-95%.
  • Float charge — charging voltage and current decreases to zero, while the battery reaches full charge.

Conversely, lithium batteries are fit for quick charging.

You’re able to charge them to 80% of their full capacity in just 1 to 2 hours (depending on the power output of your charger).

The remaining 20% will take another 2 to 3 hours. Therefore, you can fully charge a lithium-ion battery in 3 to 5 hours.

Both types of batteries support quick discharge and can provide intense pulses of current (hundreds of amps) if required.


Battery Capacity

Battery capacity refers to the maximum amount of energy that can be stored and extracted from a battery. This is expressed in kilowatt-hours (kWh) as well as ampere hours (Ah/Amps).

However, the actual storage capabilities of a battery can vary significantly from the “nominal” rated capacity because of factors such as:

  • Temperature
  • State of charge
  • The type of electric load connected

In summary though, the higher a battery’s capacity, the more expensive it’ll be.


Which Type Of Solar Battery Is Worth The Cost?

Think of it like this — a solar battery’s worth is contextual.

You could go out and buy yourself the most expensive battery on the market, but if its specifications aren’t suited to your needs, then it simply isn’t worth the money.

But that’s a pretty lazy answer — so how do we attack this question?

Well, one of our aims here at Climatebiz is to arm our readers with the knowledge to make informed decisions.

In this case, we’re going to provide you with background information on each type of battery technology. That way, you’ll have a better understanding of what battery type is best suited to your needs.


Lithium-Iron Batteries (LiFePo4) Overview

Battle Born Lithium-Iron battery - Solar battery cost.

LiFePo4 batteries are the most common type of lithium solar batteries out on the market. They have the following components:

  • Positive electrode: Lithium oxide LiFePo4 (Lithium Iron Phosphate)
  • Negative electrode: Carbon
  • Electrolyte: lithium salt (Li+, gel type)
  • Membrane separator

Their working principle is based on the exchange of lithium ions (Li+) from one electrode to another — this is thanks to the electrolyte. This flow of ions generates a current outside the battery cell.

Pros & Cons

Pros
  • High storage capacity
  • Fitted for intermittent charging
  • High power output
  • Very durable (5000 cycles, 10 years)
  • Accepts quick charge
  • Lightweight
  • Tolerates high temperatures well
Cons
  • Substantially more expensive than lead-acid
  • Average safety levels
  • Reduced levels of performance under cold temperatures

Related Reading: Can You Overcharge a Lithium Battery?


GEL Batteries Overview

Renogy GEL battery - Solar battery cost.

The GEL battery is a type of lead-acid battery that was invented 70 years ago by a German company —  Sonnenschein.

It’s both sealed and maintenance-free.

The main feature of this battery is the gel electrolyte. This makes the battery nice and safe — no gas outbursts and electrolyte leakage can occur (under normal usage conditions).

A solar GEL battery contains the following:

  • Positive electrode: PbO2 (lead oxide)
  • Negative electrode: Pb (pure lead)
  • Electrolyte: H2SO4 (sulfuric acid as a gel)
  • Membrane separator

The basic working principle of this battery involves the exchange of H+ ions between the positive and negative electrodes through the electrolyte. This movement of ions creates a flow of electrons (electricity) outside the battery to power a load. The opposite reaction occurs when the battery is charged with solar energy.

Pros & Cons

Pros
  • Relatively cheap
  • Maintenance-free
  • Safe to use
  • Tolerate high temperatures
  • Higher life cycle than AGM
Cons
  • Heavy
  • Sensitive to overcharge and deep discharge
  • Low output power
  • High self-discharge rates
  • Low life duration (500 cycles, 3 years)

AGM Batteries Overview

Canbat AGM battery - Solar battery cost.

The Absorbed Glass Mat (AGM) solar battery is another type of lead-acid battery that was first manufactured in 1980.

It has the same components as a GEL battery, except the acid electrolyte is absorbed on a fiberglass matt. This makes the battery both safe and leakproof.

The working principle is also exactly the same as the GEL battery. A flow of H+ ions between the two electrodes generates a current.

Pros & Cons

Pros
  • Relatively cheap
  • Supports high power load
  • Resistant to cold weather
  • Maintenance-free
  • Safe
Cons
  • Degrades if overcharged
  • Heavy
  • Low life duration (3 years at 50% depth of discharge)
  • Does not support quick charging
  • Low tolerance to intermittent charging

Final Thoughts

It’s rather unfortunate that companies haven’t done more to assist their online customers with solar battery pricing information.

Sure, manufacturers like Battle Born, Renogy, Ampere Time, and Canbat have made an effort, but more can and should be done. After all, consumers are veering away from in-store purchases and relying more on the internet for their product needs – hence the rise of Amazon, etc.

All of that aside, we hope this article has given you a much clearer idea regarding 12V solar battery costs. Rest assured, we aim to add more content and make it even more comprehensive once we’ve gathered the necessary data!

Robert Wortrich

Robert Wortrich

Robert is a content creator and editor. His passion for researching and the environment led him to joining the Climatebiz team. When he isn’t busy writing articles or learning more about everything Green Technology-related, you’ll find him spending time with friends or hiking one of the many wonderful trails that his home – Cape Town – has to offer.

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Don Trembly

Very informative and excellent comparisons.

Kyle Browning

Thanks Don, we are glad you found this article useful.

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