That's not my set-up... just an internet photo of a Trace Engr. inverter with a boat load of Trojan batteries. Sam's Club sells Trojans for fairly cheap and nothing beats them in performance. Trace is a brand that is top shelf quality--- liken it to Tektronics or HP lab equipment. And yes, those equine trinkets hanging there make for a potentially dangerous event ... even if their is a ventilated cover for that box.
My inverter is an industrial monster pulled from a shop. Not as efficient as modern-day units are at 90%+ but it's bomb-proof kin design and construction. That darn 19" rack mount box weighs about 50lbs.! The Group 31 battery yields something like 225amp/hrs. It's a nice system to have for power during night-time sleep versus hearing a genset roaring away -- save that for daytime hours.