As the number of items in the house that I'd like to be UPS-protected grows, I've been thinking about getting a single largish unit which can supply a decent run time to whatever is turned on, rather than many small units.
I started looking at the options and found I can get large capacity deep-discharge lead acid batteries and quality chargers for reasonable prices but that a high power inverter was going to cost much more than, say, a complete APC UPS of the same power rating.
What's going on here? Are inverters just seriousy overpriced, or are the UPS inverters poor quality and unable to withstand long run times
-- the availabilty of external extendable battery units would seem to suggest they're designed for this.
What's would be a good plan for a high-power UPS that could last, say, an hour or preferably two, without having to start up a generator?
Any thoughts welcome.