Goal Zero is serving a niche market, with lofty ideals.
In theory, their solution looks workable, in practice, I expect they fall short for most application.
Solar panels aren't durable components, somewhat delicate. Not ideal traveling companions.
Batteries are the expense of electric storage. Lead acid is old hat, which indicates high prices are not due to high tech, but niche marketing ploy. Also lead acid is expensive to ship.
Lithium batteries are more current tech. Since goal zero doesn't use them, it leaves me to believe they're not a high tech company. They add window dressing to old tech. Doubt their window dressing is worth the expense, but that's my opinion.