Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.

Browse every Black Friday offer we could findBrowse every Black Friday offer we could find

View The Sift
popular
popular
MinhTrinh 794 Views
Yesterday 4:41 AM

Bluetti B500K expansion battery for Apex 200 ＆ Apex 300 $1519

$1,519

$1,999

24% off
Bluetti
Get Deal at Bluetti

Why are you downvoting this deal?

Good Deal?
3Comments
Save
Share
Deal Details
Bluetti B500K expansion battery for Apex 200 ＆ Apex 300, AC300, AC500, AC200L, AC200Max

Add 5kwh battery to any of the Bluetti system above to extend run time

On sale for $1599, use code BLUE6OFF to make it $1519


https://www.bluettipower.com/prod...3756903643
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Bluetti B500K expansion battery for Apex 200 ＆ Apex 300, AC300, AC500, AC200L, AC200Max

Add 5kwh battery to any of the Bluetti system above to extend run time

On sale for $1599, use code BLUE6OFF to make it $1519


https://www.bluettipower.com/prod...3756903643

Community Voting

Deal Score
+7
Good Deal
Bad Deal

Why are you downvoting this deal?

Get Deal at Bluetti

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

3 Comments

Sign up for a Slickdeals account to remove this ad.

Yesterday 2:05 PM
3 Comments
Joined Aug 2013
jasonwcYesterday 2:05 PM
3 Comments
FYI, you can use any 51.2V LiFePO4 battery with Bluetti power stations that have a battery expansion port. Watt Cycle sells a custom cable that connects to the battery expansion port on Bluetti power stations (Apex 200, 300 etc.) to a standard ring terminal. It uses 8 AWG high-temperature rated cables and has a built-in 80A fuse, and is rated for 50A continuous current. It's $50 but you can use a 5% off coupon (I used Jasonoid LLC) to drop the price to $45.

You can then hook up the power station to any 5.12V LiFePO4 battery of your choosing. I went with the UL1973/9540A listed Eco-Worthy 51.2V 100Ah Cubix 100, which I acquired from Eco-Worthy's official AliExpress store for $517 ($630 - $110 coupon - $2 perk). This battery has the same capacity as the B500K - 5.12 kWh, bringing the price to 10.1 cents/watt. In contrast, the B500K is 29.7 cents/watt, nearly 3x more expensive. The B500K does have electronic communication with the Bluetti power station, which should help keeping the external and internal batteries balanced. If using your own battery, you will also need a 58.4V battery charger so you can charge your DIY battery to 100% before connecting it to the Bluetti unit (which should also be charged to 100% first), but this is only around $100 and can be used for multiple batteries. This video explains how the setup works with a DIY battery - https://www.youtube.com/watch?v=k3-b13V4isg

See https://slickdeals.net/f/20277234-eco-worthy-cubix100-48v-100ah-5120wh-lifepo4-home-server-rack-battery-526-20-free-s-h?src=SDSearchv3&attrsrc=Thread%3AExpired%3ATrue%7CSearch%3AType%3Anormal%7CSearch%3ASort%3Arecent%7CSearch%3AHideExpired%3Afalse

Will Powers has a good breakdown of the Eco-Worthy 51.2V 100Ah Cubix battery here - https://www.youtube.com/watch?v=4rW7RekF3k8
Last edited by jasonwc November 10, 2026 at 07:08 AM.
Yesterday 5:18 PM
1.1K Comments
Joined Aug 2008
la9eraYesterday 5:18 PM
1.1K Comments
Quote from jasonwc View quoted comment :
FYI, you can use any 51.2V LiFePO4 battery with Bluetti power stations that have a battery expansion port. Watt Cycle sells a custom cable that connects to the battery expansion port on Bluetti power stations (Apex 200, 300 etc.) to a standard ring terminal. It uses 8 AWG high-temperature rated cables and has a built-in 80A fuse, and is rated for 50A continuous current. It's $50 but you can use a 5% off coupon (I used Jasonoid LLC) to drop the price to $45.

You can then hook up the power station to any 5.12V LiFePO4 battery of your choosing. I went with the UL1973/9540A listed Eco-Worthy 51.2V 100Ah Cubix 100, which I acquired from Eco-Worthy's official AliExpress store for $517 ($630 - $110 coupon - $2 perk). This battery has the same capacity as the B500K - 5.12 kWh, bringing the price to 10.1 cents/watt. In contrast, the B500K is 29.7 cents/watt, nearly 3x more expensive. The B500K does have electronic communication with the Bluetti power station, which should help keeping the external and internal batteries balanced. If using your own battery, you will also need a 58.4V battery charger so you can charge your DIY battery to 100% before connecting it to the Bluetti unit (which should also be charged to 100% first), but this is only around $100 and can be used for multiple batteries. This video explains how the setup works with a DIY battery - https://www.youtube.com/watch?v=k3-b13V4isg

See https://slickdeals.net/f/20277234-eco-worthy-cubix100-48v-100ah-5120wh-lifepo4-home-server-rack-battery-526-20-free-s-h?src=SDSearchv3&attrsrc=Thread%3AExpired%3ATrue%7CSearch%3AType%3Anormal%7CSearch%3ASort%3Arecent%7CSearch%3AHideExpired%3Afalse

Will Powers has a good breakdown of the Eco-Worthy 51.2V 100Ah Cubix battery here - https://www.youtube.com/watch?v=4rW7RekF3k8
Love your explanation.
Yesterday 5:41 PM
528 Comments
Joined Mar 2009
twiztid83222Yesterday 5:41 PM
528 Comments
Diy is way better than this. Even plugging a battery in a solar port is 5x cheaper

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

Related Searches

Tech & ElectronicsBLUETTIBluetti