Bluetti ac500 + b300k Portable Power Station and Battery for $1200 at Costco

eric102

Today 1:39 AM

418 Comments

Joined Feb 2010

eric102Today 1:39 AM

418 Comments

I have one of these and four batteries in use 24/7 for 4 plus years. No issues and still occasionally getting software updates. Works great as a whole house UPS grid backup and solar generator. My hodgepodge collection of solar panels brings in 2,600 watts. Great deal, I think I paid over 2k back then just for the AC500, no battery included.

Last edited by eric102 September 8, 2026 at 06:43 PM.

MinhTrinh

Original Poster

Pro

Today 2:27 AM

6.8K Comments

Joined Nov 2006

MinhTrinhToday 2:27 AM

Original Poster

Pro

6.8K Comments

Quote from eric102

:

I have one of these and four batteries in use 24/7 for 4 plus years. No issues and still occasionally getting software updates. Works great as a whole house UPS grid backup and solar generator. My hodgepodge collection of solar panels brings in 2,600 watts. Great deal, I think I paid over 2k back then just for the AC500, no battery included.

I know right. The battery by itself is $900 (refurbished) to $1100 (new on sale). I just dont need another AC500 inverter. Otherwise, i would jump on this set up.

BeepBopBeep

Today 2:42 AM

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Joined Jul 2013

BeepBopBeepToday 2:42 AM

2.8K Comments

How do I determine what size battery I would need? Is there a calculator? My average monthly consumption is 2000KWh

Caleo

Today 3:42 AM

6.7K Comments

Joined Dec 2004

CaleoToday 3:42 AM

6.7K Comments

Quote from BeepBopBeep

:

How do I determine what size battery I would need? Is there a calculator? My average monthly consumption is 2000KWh

Depends what you want to power. 2000kWh/mo is pretty heavy consumption. That's about 66kWh/day, or a continuous average of almost 3kW.. it's not really realistic to expect any portable battery backup solution to handle that kind of power for more than a couple hours, period. You'd have to spend a fortune buying proprietary batteries for units like this or Ecoflow's just to last 8+ hours (like 30kWh worth) as if nothing happened.

You're probably running central AC a lot, and one of these as a 'whole home backup' would likely be at or near overload with just that alone, nevermind everything else you might have running simultaneously.

If you can dial it back to just your fridge, chest freezer, and maybe a few other essential circuits during an outage, you could have a fridge/freezer & some lights and other moderate loads (~600-800W total average) last 12hrs+ with 10kWh worth of batteries.

Last edited by Caleo September 8, 2026 at 08:45 PM.

Bluetti ac500 + b300k Portable Power Station and Battery for $1200 at Costco

$1,200

$1,500

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