BLUETTI B300 3072Wh Expansion Battery For AC300/AC200MAX/AC200P/EB240/EB150, Expand AC300 w/ 4 Extra
Extension Battery Pack for AC300 Solar Generator B300 equipped with 3,072Wh capacity. Features with a 100W USB-C, a 12V/10A car output and a USB-A ports, you can use the B300 as a portable power station. The smart MPPT inside of the B300 enables it to recharge quickly through solar power at a 200W maximum loading scale. You can also recharge it by wall socket, car charging or lead-acid battery. Car charging and lead-acid battery charging need to be realized through D050S.
Extension Battery Pack for AC300 Solar Generator B300 equipped with 3,072Wh capacity. Features with a 100W USB-C, a 12V/10A car output and a USB-A ports, you can use the B300 as a portable power station. The smart MPPT inside of the B300 enables it to recharge quickly through solar power at a 200W maximum loading scale. You can also recharge it by wall socket, car charging or lead-acid battery. Car charging and lead-acid battery charging need to be realized through D050S.
Extension Battery Pack for AC300 Solar Generator B300 equipped with 3,072Wh capacity. Features with a 100W USB-C, a 12V/10A car output and a USB-A ports, you can use the B300 as a portable power station. The smart MPPT inside of the B300 enables it to recharge quickly through solar power at a 200W maximum loading scale. You can also recharge it by wall socket, car charging or lead-acid battery. Car charging and lead-acid battery charging need to be realized through D050S.
Extension Battery Pack for AC300 Solar Generator B300 equipped with 3,072Wh capacity. Features with a 100W USB-C, a 12V/10A car output and a USB-A ports, you can use the B300 as a portable power station. The smart MPPT inside of the B300 enables it to recharge quickly through solar power at a 200W maximum loading scale. You can also recharge it by wall socket, car charging or lead-acid battery. Car charging and lead-acid battery charging need to be realized through D050S.
in 11 offers
The lowest price for BLUETTI B300 3072Wh Expansion Battery For AC300/AC200MAX/AC200P/EB240/EB150, Expand AC300 w/ 4 Extra right now is $2,699.00 at Bunnings Warehouse, compared across 10 retailers.
The all-time low was $1,999.00 on 8 Nov 2025 — today's price is 35% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 10 June 2026.
Last updated at 10/06/2026 14:15:43
BLUETTI B300K Expansion Battery | 2,764.8Wh
Free delivery
Bluetti B300 Expansion Battery for AC300 AC500 AC200MAX - by Outbax
Free delivery
Bluetti B300 Extra Battery for AC300 and AC200MAX
Free delivery between 15–22 June
BLUETTI B300 Expansion Battery | 3072Wh( Renew )
BLUETTI B300 Expansion Battery | 3072Wh
Bluetti B300 Expansion Battery | 3072Wh
Delivery $10
BLUETTI B300 3072Wh Expansion Battery for AC300/AC200MAX/AC200P/EB240/EB150, Expand AC300 w/ 4 Extra Battery,Portable Power Station w/ 100W USB-C &
BLUETTI B300 Expansion Battery | 3072Wh For AC300 Power Station
Free delivery between 16–22 June
Bluetti B300 Expansion Battery - 3072Wh
Free delivery between 15–19 June
Bluetti Battery B300
Free delivery
originally posted on generationecostore.com
I bought the AC300 and 2 B300 with 350 solar panels. Good quality and easy to use.It has lots of power.The first time I used it, the batteries together were at 67 percent. I plugged in our refrigerator and it ran for 28 hours before I had to recharge batteries.
originally posted on bluettipower.com
I have 2 B300s and will soon purchase 2 more to max out my AC300. I really love the high quality and feel of the B300. It isn't light but the built in handles makes it easy to maneuver. The massive amount of energy storage in this beast is quite remarkable. The solar industry has came a long way in a very short time, and Bluetti is about as "cutting edge" as it gets.
originally posted on shopsolarkits.com
Service and shipping was very fast. Cannot say enough about this battery and the AC200Max kit I purchased.....simply perfect for me.Be aware that these units are very heavy and are best placed in a position where you don't have to move them. I personally have to move my system around sometimes so I built a quick cart for it.Highly recommend!
| Life Cycle | 3500+ Cycles to 80% Original Capacity |
| Management System | MPPT Controller, BMS, etc |
| USB-A Port | 1 x 18W USB-A |
| AC Input | 500W Max |
| Solar Input | 200W Max., VOC 12-60VDC, 10A |
BLUETTI B300K Expansion Battery | 2,764.8Wh
Free delivery
Bluetti B300 Expansion Battery for AC300 AC500 AC200MAX - by Outbax
Free delivery
Bluetti B300 Extra Battery for AC300 and AC200MAX
Free delivery between 15–22 June
BLUETTI B300 Expansion Battery | 3072Wh( Renew )
BLUETTI B300 Expansion Battery | 3072Wh
I bought the AC300 and 2 B300 with 350 solar panels. Good quality and easy to use.It has lots of power.The first time I used it, the batteries together were at 67 percent. I plugged in our refrigerator and it ran for 28 hours before I had to recharge batteries.
I have 2 B300s and will soon purchase 2 more to max out my AC300. I really love the high quality and feel of the B300. It isn't light but the built in handles makes it easy to maneuver. The massive amount of energy storage in this beast is quite remarkable. The solar industry has came a long way in a very short time, and Bluetti is about as "cutting edge" as it gets.
Service and shipping was very fast. Cannot say enough about this battery and the AC200Max kit I purchased.....simply perfect for me.Be aware that these units are very heavy and are best placed in a position where you don't have to move them. I personally have to move my system around sometimes so I built a quick cart for it.Highly recommend!
This is one of the best back up solar batteries in the market. It's a solid product, though a bit on the expensive side. The modular ability for stacking up B300s for an AC 300 solar generator is phenomenal. The power of the solar generator with 4*B300s is unparalleled. Very useful in these days with unpredictable weather and grid failures. I love this unit :).
First bought Ac 300 and one battery! Also two 200w solar panels. Loved how easy to use. Saved up to buy another battery on prime day. We are getting black outs in CA because of heat and fire risk. So glad to have the system so we can run AC when 104 degrees. Thank you Bluetti.
This is the third battery for my AC300. It is running as a UPS right now but I will install solar panels as money and heat on the roof permit. The power blinked out last week but my internet, WIFI and computer kept running without waiting for them to reboot. No reboot time, that was nice. Everything kept running like nothing happened. No beeping,... the beeping of the old UPS would drive my wife crazy.
2 things that need to change. Remive enable wifi in A300 only with mandatory online registration. It should be available in the LCD Panel itself, enable wifi, and connect to wifi and type password. Period.Second thing is to have the more inventory of smart panels. Bluetti says it's possible, but they don't have inventory. This is very unsatisfactory.Other than that, every works as advertise.
I have been buying products from Bluetti for over a year. I am very happy with their sales, products and especially their service. Best thing we added to our solar panel system. It gives us more autonomy.I recently decided to try Bluetti products coming from using similar products from another vendor. I'm impressed with the build quality and admire Bluetti's modular approach. Have many Bluetti products and they all work great. Good quality battery. I like the Bluetti products and own three of their solar generators! Thank you Bluetti for a robust expansion battery! Service is good but can take some time.
Winter before last we had an ice storm and went without electricity for 8 days. We were cold the entire time. While we have a gas furnace we had no way to run the thermostat or blower. Since then we've been looking for ways not to have to endure that kind of thing again. After doing research we decided to buy a Bluetti AC300 + 1*B300 home backup system, which we recently expanded to two B300 extension batteries.It occurred to me that the Bluetti system could be used for more than emergencies. PGE (as many electricity providers do) has a plan that charges different rates according to the time of day. Peak hours (5-9pm) is the most expensive. The cheapest time is between 9pm and 7am and on weekends. I charge the batteries during the least expensive hours and use ... MoreWinter before last we had an ice storm and went without electricity for 8 days. We were cold the entire time. While we have a gas furnace we had no way to run the thermostat or blower. Since then we've been looking for ways not to have to endure that kind of thing again. After doing research we decided to buy a Bluetti AC300 + 1*B300 home backup system, which we recently expanded to two B300 extension batteries.It occurred to me that the Bluetti system could be used for more than emergencies. PGE (as many electricity providers do) has a plan that charges different rates according to the time of day. Peak hours (5-9pm) is the most expensive. The cheapest time is between 9pm and 7am and on weekends. I charge the batteries during the least expensive hours and use that power during peak hours instead of the grid. In that way I avoid the higher rates almost entirely. Our monthly electricity bill dropped from about $140 on average to $22.16 this last month after we got our second battery. That's a pretty big drop.We do have a couple of solar panels, but because we have so much shade around our house they don't contribute much. I'd say you are better off getting a home battery backup system than mounting solar panels if you have trees shading your home. Storing electricity when it's least expensive pays off in all weather all year round.
I recently purchased a b300 to as an extension to my eb240, I have not used to b300 yet, but the eb240 is fantastic. 1000w inverter is plenty for a car fridge/freezer, single stove burner, lights, phones, camera and laptops. The 2400wh is just as fantastic for a portable battery back up. The only comment i have so far about my b300, is that is a heavy beast. I have had my eb240 charger (200w) on the b300 for 8+ hours and it hasnt charged from 80-100 percent yet....I so i would say getting the 500w charger could be beneficial.
| Life Cycle | 3500+ Cycles to 80% Original Capacity |
| Management System | MPPT Controller, BMS, etc |
| USB-A Port | 1 x 18W USB-A |
| AC Input | 500W Max |
| Solar Input | 200W Max., VOC 12-60VDC, 10A |