Long Term Storage - Runhood Rallye 1200

Greetings,
In September 2023, I purchased a Runhood Rallye 1200 Modular Power Station via a Kickstarter Project.
I planned to use it during retirement. However, I ended up continuing to work up until now and it will probably be another 6 months before I get the chance to use the Runhood.
During this time, I had the unit stored in my attic and I must admit that I have never plugged it in.
Given that batteries are a component of this product, my question is, will the Runhood still work, having never been plugged in over this long period?
Additionally, if I don’t plan to use it for another 6 months, should I plug it in at this time, or should I continue to store it as is until I finally need to use it?
Any information on what to expect when I finally attempt to use it in six months would be appreciated.