My wife works in the UPS ( Uninteruptible Power Supply ) business. I can get a 600 Amp\hr battery anytime ... if I could carry it !! About 60 kg !!
Just FYI though, modern UPS's work at about 95-97% efficiency nowadays. Older models used to be around 80-85% at best. Electronics and control has evolved a long way.
What intrigues me is it is only 2.5kg ( incl case )????
I know LiPo is lighter than LeadAcid
but can you get 100Ahr at 3.7v with that weight of batteries???
This figure is in litres, so weight for weight, the differential is even higher between LiPo and lead-acid.
The big question for me is safety - LiPo batteries must be carefully controlled for charge current and temperature or they can get very hot and self-immolate. And they must not be discharged below a certain point, which means the battery controller must be quite a bit smarter than an equivalent lead acid controller.