The Bluetti Expansion Battery Packs: All You Need to Know About the Bluetti B230, B300, B300S, B500, and B80 Expansion Batteries

Readers are what keep us going. We may get commissions for the purchases you make through the links.

Bluetti is a leading vendor of solar-based portable solar power stations, and it offers a wide range of impressive external batteries to go with its rich portfolio of modular batteries, covering both portable and home batteries.

The B230, B300, B300S, B500, and B80 are some of the notable extra batteries that the brand has on sale as of this writing.

The B80 is the brand’s smallest extra battery, which is designed for the smallest modular power station, the AC60, while the B500 is the biggest one that goes only with the brand’s home battery pack, the EP900.

The other models – the B230, the B300, and the B300S – are kind of universal models as they are compatible with multiple power stations like the AC200 Max, AC300, AC500, and more. By the way, the B500 and the B80 work exclusively with their base models, the EP900 and AC60.

Here is our detailed take on Bluetti’s B230, B300, B300S, B500, and B80 extra battery modules.

Update in May 2023: The B80 Extra Battery: The B80 is an 806 Wh expansion battery exclusively designed for the AC60, the smallest modular power station from Bluetti. Using this battery, you can expand a unit of AC60 up to 2015 Wh.

Update in April 2023: The B500 Extra Battery: This is the extra battery pack for the brand’s much-touted home power backup system, the EP900. It is a 4960 Wh LFP battery that only works with the EP900.

Bluetti B300S Release Update, November 2022: Bluetti launched the B300S extra battery along with its much-touted base model, the AC500, on Nov. 24th, 2022, for the Black Friday sale on its official website for a price starting at $4499 (the bundle). The separate price of the B300S is around $2300.

B300S Crowdfunding Release Update: Bluetti unveiled the AC500+B300 combo on Indiegogo on September 1, 2022. The B300S battery alone has an early bird price starting at $1799.


Bluetti B230 Extra Battery Module


  • 2048Wh LiFePO4 Battery Pack.
  • Compatible with AC200 Max and AC300.
  • 500W AC Charging Input.
  • 100W USB-C PD, USB-A 3.0 QC, and 12V Sockets
  • 8.9 x 16.5 x 11 In and a Weight of 48 Lbs.

Bluetti B300 Extra Battery


  • 3072Wh LiFePO4 Battery Pack.
  • Compatible with Bluetti AC300. 
  • 500W AC and 200W Solar Charging Inputs.
  • 100W USB-C PD, USB-A 3.0 QC, and 12V Sockets. 
  • 10.5 x 20.5 x 12.5 In and 79.6 lbs Weight.

Bluetti B300S Extra Battery Module


  • 3072Wh LiFePO4 Battery Pack.
  • Self-Heating Battery Pack. 
  • 500W AC and 500W Solar Charging Inputs.
  • 100W USB-C PD, USB-A 3.0 QC, and 12V Sockets.
  • 1000-Watt Dual Charging.
  • 240V Split Phase Bonding.
  • 20.5 x 12.5 x 10.5 in. and 79.6 lbs.

The Bluetti Expansion Battery Modules

Even though the Bluetti extra battery modules are designed to add additional storage capacity to the brand’s power stations, some of them come with separate charging outlets and inlets.

See, for example, that the B300 has a 200-watt MPPT controller to let you directly charge it from the sun, while the B300S has a 500-watt solar input and is a self-heating battery pack.

Bluetti launched the B230 and B300 battery packs with its AC200 Max and AC300 power stations.

The B300S is the latest model that Bluetti launched with its apex AC500 power station. But with a converter cable and a DC Enhancer D050S, the battery modules can be used with almost all of the brand’s large power stations, like the EP500, AC200, AC200P, EB150, and EB240.

With the DC Enhancer, you can charge these battery packs directly from a 500-watt solar source via its AC input. That said, you can attach the B300, which has an overall solar output of up to 700 watts, along with its built-in solar charging input.

Meanwhile, the B300S can accept up to 1000 watts of power with solar and AC inputs.

Bluetti B230 Expansion Battery Module

As you know, this is the smaller variant of the duo. It equips a 2048Wh LifePO4 battery pack with an individual AC input of 500 watts. It has no solar charging option, but you have multiple charging options.

They are single pieces of a Type-C USB 3.0 100W Power Delivery port, a USB 3.0 Quick Charge 18W port, and a 12V/10A carport. Even without connecting it to a power station, it can power up your essential USB and DC devices.


As said above, the Bluetti B230 hit the stores along with the brand’s AC200 Max. At its debut, it was only available in bundles with the modular power station.

The B230 is a highly compact and ultra-portable battery pack. You can easily take it on its built-in carry handles and enjoy access to unlimited portable power. It has a size of 16.5 x 8.9 x 11 inches and a weight of 48 lbs.

Bluetti B300 Expansion Battery Module

It is a bigger-capacity extra battery module from Bluetti.

The B300 is equipped with a 3072Wh LifePO4 battery pack, and it will be launched with the brand’s AC300 in September 2021. It is also compatible with most of the brand’s other power stations, including the AC200 Max.

With its extra storage capacity, it is indeed a more reliable option for off-grid users and emergency preppers. Other than the 500-watt AC input, it also has a solar input, as stated above.


Unlike its younger sibling, this one has an MPPT controller and a 200-watt solar charging input. So, you can have a total input power of 700 watts with the AC input. For charging ports, it has the same units as its younger variant, the B230.

The Bluetti B300 has a size of 20.5 x 10.4 x 12.6 inches and weighs 74 lbs. It is also compatible with the company’s special DC Enhancer, so users of old-generation Bluetti power stations will be lucky to get a more powerful extra battery with individual solar and AC charging options.

It has a retail price of $2099 and will be available to you at a debut price of $1599.

Bluetti B230 Vs. B300 Vs. B300S – What to Buy?

The main difference between the batteries is all about the storage capacities of the three Bluetti battery modules.

You have three extra battery modules with the same compatibility features. The most recent B300S is the most advanced one with its self-heating feature and a faster solar charging input.

Using the brand’s convertible cable, you can connect single pieces of the batteries to the AC200 and AC200P through their solar input ports.

If you want to connect more than one unit or use them with the old-generation Bluetti power stations, you can get the special DC Enhancer.

On the Bluetti website, the battery modules are available individually and in bundles with various compatible power stations.

Bluetti B80 Expansion Battery


As was said above, the B80 is the exclusive expansion battery of the brand’s smallest modular power station, the AC60.

Specs-wise, the B80 is an 806 Wh extra battery that you can use with the AC60 to take its storage capacity to higher levels.

Along with being an extra battery, the B80 features its own charging inputs and output ports.

Well, it integrates a 12V carport, an 18W USB-A port, and a 100W USB-C PD port, which can also be used to charge the battery.

What’s more, the little extension battery from Bluetti has an IP65 rating, so it can be used in rough and wet outdoor conditions with no worries.

Yet another lovely thing is that this battery is not only meant for the A60. It can also be hooked up with the brand’s other compact and small power stations, like the EB3A, EB55, and EB70S.

Bluetti B500 Extra Battery


Finally, we have the Bluetti B500. This is the extra battery pack of the brand’s home battery backup system, the EP900.

The B500 is a heavy-duty 4960 Wh LFP battery pack that only works with the EP900 system, which is one of the best home battery packs on the market today.

You need to attach at least two units of the B500s to an EP500 home battery, which is a massive 9000-watt backup system to power your entire house and work site for longer days in the case of blackouts.

Frequently Asked Questions

What is a Bluetti Expansion Battery?

An expansion battery is an add-on battery module that you can use with any of the brand’s modular power stations for additional storage capacity.

The brand’s 100% modular power stations, like the AC500, the AC300, and the EP900, essentially need these battery packs for storage capacity.

The other models, like the AC200 Max and the AC60, which have built-in batteries onboard, can be further expanded with these battery packs.

Bluetti has as many as five different extra battery packs: the B230, the B300, the B300S, the B500, and the B80 are some of them. As you can see, they are specifically designed for the brand’s different models, like the AC200 Max, the AC300, the AC500, the EP900, and the AC60.

Can You Use a Bluetti B300 by Itself?

Yes, most of the Bluetti expansion battery packs, including the B300 and the smallest of the family, the B80, can be used by themselves.

They are all designed like power stations with USB, DC, and solar options for charging and delivering power.

These battery packs have USB-A, USB-C, and 12V chargers, and some models, like the B300, also have solar input for directly charging from the sun.

But they don’t have AC input and output ports, which means you can use these extra batteries as small backup systems to power up your USB and DC devices even without the need for their mother units.

Is Bluetti Weatherproof?

Not all the Bluetti power stations and solar panels are weatherproof, but some of its recent products, like the AC60, B80 extra battery, and AC180, feature an IP65 rating for protection from some bits of water and dust.

When it comes to the Bluetti extra battery packs, the B80 is a waterproof and dustproof model like its mother unit, so you can use it in pool and seaside applications without any worries.

Final Thoughts

That has been our take on the Bluetti B230, B300, and B300S expansion battery modules.

We have checked out all the specs and features of the innovative extra-battery modules.

These extra battery packs make Bluetti a special brand. Even if its competitors like EcoFlow, Zendure, and AllPowers have extra battery packs, Bluetti offers more flexibility and cross-device applications, letting you save money on buying additional battery packs.


Leave a Comment

Sign Up for Our Newsletter

Enter your email and stay on top of things.