If you go Goal Zero, go with their newer Lith-Ion-based units, even though it comes at a serious premium for the watt-hours you're getting. It fits the purpose so much better. And in terms of lifespan, I see it as a way better set of products versus their first gen products.
I'm with VegasPhotog wrt the ROI of a battery vs. a generator. Right now, if you don't mind burning dinosaurs, genuinely nothing really comes close yet to the instant convenience delivered per dollar. The top-tier gensets offer legitimately effective muffler/silencers, making it less offensive. You can't, however, get away from the fact that you're beholden to how much your fuel container can carry. And even if you're happy with a the genset's carbon footprint, the fumes generated do intrude on your interaction with nature. And it's apples-vs oranges...gensets *produce* on-demand power...they don't *store* power. So...while it wins the dollar value and lifespan, there's definitely a trade off.
Goal Zero ... It's definitely the go-to name in camping-oriented personal-sized power-storage & solar power production. iNergy is a distant 2nd player in the market. I saw their product years ago, and it doesn't look like they're going for anything but a tiny slice of the market.
Anyone watching their product lineup over the years has noticed that their first gen products were based on sealed lead acid technology, which does offer decent power density. But its weight blew chunks. Who's gonna bring a 100+ lbs of a 1250 watt-hour battery pack into the woods? The same person who's happy to bring *two* daisy-chained 50 lb Honda EU2000i's, cranking out 4k watts of Goal-Zero-butt kicking power, that's who! Lead Acid batteries also have lousy deep draw characteristics, and short lifespan when abused (or I should say, when used as one typically does in this application). So, I was thrilled to see them finally roll out Lith-ion-based products. Such a no-brainer.
And they do a *terrific* job of pairing up the energy storage with nicely integrated, purpose-built charge controllers, and thoughtfully-provisioned ports and daisy-chaining options, and pairs nicely with their family of solar gen products. They're seriously well designed pieces of kit. I looked into building comparable units out of parts readily-available from the RV industry, and it's completely doable, but you just don't get it packaged quite so nicely. So...really well-specified products, but it's a hell of a premium to get it all buttoned up in their nicely-designed boxes.
Btw, want to know the way enginerds maximize value from Goal Zero's engineering chops? Get your hands on the smallest power station, and dismantle it. Connect the battery leads to as big a battery as you can get your hands on (of the same chemistry)...voila...still pricey, but way less than shelling out $3k for their top tier power station.
Wtf is with their website only working on Internet Explorer??? It's like they're living in the 20th Century!