AC300 & Roof Solar Arrays

On Bluetti’s website it states that roof solar arrays are only applicable with AC300 systems (at least as compared to the AC200 MAX). It also says that solar expansion module is sold separately.

I don’t get it! I bought six 100 Watt Renogy rigid solar panels. What difference does it make if I put them on my house roof OR make them portable so I can take them out of storage and put them out on the ground on an “as-needed-basis” (i.e., power outage situations)?

And what is a “solar expansion module” and how much does it cost? Why can’t the solar panels simply be hooked directly into the AC300? Any help will be truly appreciated.

same questions - I emailed the company to see if they could shed some light on the Solar Expansion Module as well. We’re planning to use the AC300 to support an off-grid cabin, and are also planning on mounting panels on the roof, rather than get them out on demand. Will post here the response I get, unless someone else is able to answer!

Hi there,

Yes, AC 300 is applicable with roof solar arrays. But AC300 must work with B300.

"A solar expansion module " is B230 or B300. Here is the link:

(Sale will start at PDT 7 pm 15 September. You can buy it on Bluetti official website with an early bird price. Limited quantity, First come first serve.)

The reason why the solar panels can’t be hooked up into AC300 is that there is no battery in AC300.


Oooooohhhh, I just assumed a battery was needed period, lol, so didn’t understand why the roof solar array part mattered. Thanks for the clarification! Got the pre-order alarm set for tonight!