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Non-returnable. Transportation of this item is subject to hazardous materials regulation
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Availability:
In Stock.
Arrives
Tuesday, Nov 3
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At a glance
- Condition
- New
- Set
- BLUETTI 2xB300K
- Model
- B300K
- Weight
- 65 lb
- Wattage
- 5529.6 watt-hours
- Fuel Type
- Electric
- Power Source
- Solar Powered
- In the box
- BLUETTI 2 B300K Batteries
- Warranty
- 5 Year Manufacturer
Features 5
- [Universal Expansion Compatibility] - B300K links smoothly to Apex 300 via its expansion port, letting you upgrade capacity flexibly to fit any situationno hassle, just seamless power scaling.
- [Next-Generation Cells] - Boasts advanced cells with 4,000+ cycles to 80% capacity, boosting lifespan by 15%. They also hold up better in high temps, keeping performance steady when its hot.
- [Next-Gen Design Architecture 2.0] - B300Ks wireless internal setup cuts down on failure chances and saves space, making this expansion battery pack more compact and easier to carry.
- [Built-In USB Charging Port] - Doubles as a huge power bank with a USB port, perfect for unexpected needs. Pair it with any compatible BLUETTI power station to add extra versatility to your setup.
- [What You Get] - BLUETTI expansion battery B300K2, CA90 battery extension cable for solar generator Apex 300 and user manual.
Description
BLUETTI B300K for Apex300 BLUETTI Elite 100 mini BLUETTI Elite 100 V2 BLUETTI Elite 200 V2 BLUETTI Elite 300 BLUETTI Elite 400 BLUETTI Apex 300+B300K What power station can the B300K be connected with? B300K can be connected to BLUETTI power station models: AC200L, AC200MAX, AC300, etc. However, this B300K with CA90 battery extension (short cable) can only be connected to Apex 300. What's the recharging ways of B300K? B300K's charging input power matches that of the connected host power station, allowing it to be charged simultaneously with the host through wall chargers, solar panels, car chargers, or generators. Can the B300K battery module be used alone? Yes. B300K features an 12W USB-A making the battery module works flawlessly when standalone. B300K & portable power station charge together, reaching 80% in 45 min. Does this mean both reach 80% at the same time? "80% charging in 45 minutes" refers to the B300K's maximum charging capacity. If the energy storage device's input power is insufficient, it will not be possible to charge both devices to 80% in 45 minutes.
Specs 20
| Brand | BLUETTI |
|---|---|
| Wattage | 5529.6 watt-hours |
| Fuel Type | Electric |
| Power Source | Solar Powered |
| Recommended Uses For Product | Home Backup/Off-grid/Emergency/RV/Camping/Outdoor |
| Item Weight | 65 pounds |
| Voltage | 120 volts |
| Special Feature | 2764.8Wh Ultra-Large Capacity, 4000+ Long Cycles, Built-In USB Charging Port, Ultra-Fast Charging Speed, Wide Compatibility |
| Product Dimensions | 20.67"L x 12.87"W x 8.23"H |
| Additional Features | 2764.8Wh Ultra-Large Capacity, 4000+ Long Cycles, Built-In USB Charging Port, Ultra-Fast Charging Speed, Wide Compatibility |
| Item Dimensions L x W x H | 20.67"L x 12.87"W x 8.23"H |
| Brand Name | BLUETTI |
| Model Name | B300K |
| Model Number | B300K |
| Item Highlight | LiFePO4 Extra Battery Backup Solar Generator for Home, Emergency, Road Trip |
| Number of Packs | 2 |
| Number of Items | 1 |
| Unit Count | 1 Count |
| Manufacturer | BLUETTI |
| Manufacturer Part Number | B300K |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Tuesday, Nov 3
This item is non-returnable:
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
Non-returnable. Transportation of this item is subject to hazardous materials regulation
View our full returns policy here.
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Top Amazon Reviews
Best Powerstation for the money!
Set name: BLUETTI Apex 300
This is hands down the best powerstation I have out of a few I have personally used. Dual MPPT ports make solar generation so much easier than most. Ability to natively support 240v is a hands down winner. Plus you can’t forget the ability to expand storage from Bluetti or making your own. Considering purchasing another to work as a home backup.
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Reviewed in the United States on August 20, 2026 by Jonathan Sailer
Great unit
Set name: BLUETTI Apex 300+2xB300K
I've been using this set up for my off grid needs and it works awesome. I charge it with 4 320watt panels and by mid day it gets to 100%. It helps run a hybrid mini split, charge batteries, power my star link, travel trailer and many other things.
Reviewed in the United States on August 14, 2026 by Miguel Garcia
Loving it
Set name: BLUETTI Apex 300
This is an important improvement over the AC200 and even the AC300. With it being nearly the same size and output power as the AC300, it has actual capacity which is huge for saving space. We usually avoided bringing the AC300 camping because it took up a lot of space and still requiring an extra B300. This AP300 now has weather alerts and my favorite feature, the ability to wake up and power back on the AC outlets. This is the first bluetti battery that I've seen have this feature and is important as an emergency battery with solar.
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Reviewed in the United States on August 8, 2026 by Anonymous
Home Backup Power paired with EV
Set name: BLUETTI Apex 300+B300K
I've only needed to rely on this a couple times, but it's worked great. I set up a a generator inlet and an interlock to my panel, so I can power my home during an outage. I love the fact that it outputs 240v so I can power both legs of my panel, and even some lower demand 240v appliances. Last outage we had the power went out while we were drying clothes, and we were able to power the heat-pump dryer with the battery. I also have an EV that has V2L capability, so I'm really happy that I'm able to charge the battery using a 120v plug connected to my car while powering my house through the battery. The car can only output about 15 amps, so the battery acts as a buffer with a higher output. I only have the one station so I still have to be careful about which loads I turn on. We don't get power outages all too often, but our area does get them occasionally. It's a much cheaper solution than getting a whole home battery, especially when I already have about 75KWh sitting in my car. It could in theory last for days as long as I use the car to keep it topped off.
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Reviewed in the United States on July 16, 2026 by Nicholas Coppola
Bluetti Apex 300 Rec’d Was Damaged and Used!!!
Set name: BLUETTI Apex 300
Ordered a “New” Bluetti Apex 300 on December 1, 2025. Received 10 days later. As soon as I opened the box, it was obvious it was used. After I opened the sealed white bag an Apex 300 is shipped in, the entire top of Apex 300 was streaked from where it had been crudely wiped off. First picture even shows where one of the Bluetti labels on the top was faded out from being wiped with something wet…some kind of unknown cleaning solution. There was even a piece of masking tape with an arrow pointing to several scratches. When I pulled the Apex 300 totally out of its Bluetti box, the display glass was scratched, filthy and had fingerprints (and not mine since I used the handles). All sides looked like the top…smeared from a wet cloth, smudges everywhere and at least one fingerprint clearly on the display. When I tipped it up to see the bottom, it was the worst…absolutely filthy and barely wiped. Then I stopped, went and got my IPhone 15 Pro, and I took the following pictures. That is where the return process from hell started with Bluetti. See first you have to email them and wait to receive an Ai Bot response. It’s nothing but babble about customer service, but upon further investigation and after calling Bluetti’s Customer Service, I did find out that all emails are read and responded to by a Bluetti Ai Bot and only then does a real person review the response emails. Every Ai email I rec’d is this combination of some conciliatory fake apology about how you must feel and then apologies galore. Every single email I rec’d was the same. Through some critical writing though, I was able to get this Bluetti Ai Bot to admit the unit I received was in fact not new simply because of the little piece of masking tape with the arrow. That would be more consisted with a returned or remanufactured Apex 300 the Ai bot admitted. Bluetti asked for pictures. I supplied them. Then several days later, Bluetti asked for videos but I had already packaged the USED Apex 300 I rec’d and was ready to return it. The first day they scheduled the return for pickup was a bust and of course for the preverbal wait-all-day pick-up time. I literally checked on the package every 5 minutes on the porch so it was not stolen…first day of work missed at great expense and frustration. Bluetti rescheduled another return pickup several days later because of the weekend, and again I had to wait most of the day missing yet another day of work. Let us also not forget the now close to 10 to 12 hours and even more days trying to correspond with Bluetti’s Ai Bot for some resolution. We also missed being able to claim the 30% Federal tax deduction since the Apex 300 was to be main power station in our grid down backup option since it is a 120/240 unit. By the time our money was credited back to our account, it was too late to order and install any other power station like an EcoFlow. We also could now not claim the1900W of brand new solar panels, line fuses, 8 &10 AWG PV wire, fuses, cutoffs, 2 ga battery cables and new 51.2v LiFePo battery bank. Bluetti offered a generously laughable 5% discount should I want to reorder another Bluetti Apex 300. Now that’s customer service…let me send you a bill for all I’ve lost Bluetti and it would be close to $2500. Tell your Family. Tell your friends. Watch Will Prowse on YouTube and build your own, more capable system for less. More importantly, it’s not that hard, you’ll know and understand building your own modular system that you can fix yourself, it cannot be hacked, turned off, damaged or shut down from planned obsolescence because it has WiFi and Bluetooth. Remember Bluetti now knows your email, internet provider, address, telephone number…think that’s far fetched? Good Luck…now get it done! And yes, I’ll be taking my own advice!
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Reviewed in the United States on January 12, 2026 by Anomonous
Well designed and constructed PS Apex 300
Set name: BLUETTI Apex 300
Bluetti Apex 300 is a quality Power Station. This is my third PS by them. Plan for support during power outages here in Florida. Already used two of my PS when a tree limb took out a neighborhood power line (refrigerator and freezer). From my testing, this PS should keep our refrigerator running for around 14-19 hours in the 80/20 charge guidelines. Refrigerator used about ~4% of PS per hour. Used the app from Bluetti to set up PS, upload firmware, monitor charge status. Heavy (84lbs) so it’s sitting on a furniture dolly to make it easy to move on carpet. An Elite 200v2 is a cheaper, smaller and lighter PS but does not support extension batteries if that is a consideration. 5 year warranty. Battery life is around 6,000 charges to 80% of original capacity. Watch for sales. If you want to add solar panels for recharging PS make sure, if you buy two or more, that the panels are the same wattage, brand and model. Highly recommend for emergency power.
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Reviewed in the United States on July 10, 2026 by Daryl Johnston
Great portable power for large power requirements
Set name: BLUETTI Apex 300+Charger 1
Great unit, they are VERY heavy ~85lbs which makes moving them difficult and the lack of accessories for portability was a little disappointing but for my use I hard mounted mine to the inside of a utility trailer. They put out good power ~3800w but that's only for resistive loads, for any inductive loads (compressors, motors, a/c units etc) it cannot handle any surges above 3800w. Had a 13a 120v air compressor that the startup amperage was too high for one of these Apex 300s, had to bite the bullet and get another one with the Hub A1 and it easily starts the compressor when at its kick on pressure and can run a 20a 120v welder. Just be sure to separate large 120v loads to the separate hot legs coming out of the unit to balance out the inverter.
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Reviewed in the United States on June 6, 2026 by Amazon Customer
Far exceeds my hopes and exspectations!
Set name: BLUETTI Apex 300+B500K
As weather extremes and power outages appear to becoming the norm, I wanted to add on-demand, in-home electric power capacity to my preparedness measures. This Bluetti equipment ( one of two that I purchased) more than meets my current needs, has many useful extra features, is easy to set up and operate. I couldn't be happier. If the need arises, I will definitely purchase additional equipment from Bluetti.
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Reviewed in the United States on September 16, 2026 by Dr J A Marquis