Alright Techie#1,
First I donno much technical but hope the below clarifies some points:
1 I have not opened SUA750i(will try that) but as my 800VA had 2 7ah, I presume the same. This is because for APC 1.5 to 2.2 to higher(3,5,7,10, kV) that demand enormouse battery resources uses Exide batteries. Any APC dealer will show you that happily. I saw th ones needed for a 2.2 KV model. Just for the info part, he quoted 42K for the model with 4 Exide 28 ah batteries(very costly)(APC Smart-UPS XL 2200VA 230V No Battery)
For this 1.5kv model he quoted ~19K. Load of 1980 watts(APC Smart-UPS 1500VA USB & Serial 230V) and 1kv for ~12K (APC Smart-UPS 1500VA USB & Serial 230V) - both sporting internal APC batteries.
2 Numeric is the next best or comparable to APC, as I heard, but you can configure APC with their net agent software all the oltage, surge etc... a lot, even with a SUA750i one too. But I suggest you go for 1kv or more but all are pure sinewave.
3 I do not know but guest AOC needs direct mains to be effective:huh: and am not sure I answered your questions well - any o it.
But yes Numeric is as good as APC but I went for APC since I need to power my A/V receiver too, just for switchng off when mains off. See for the connections before going for APC. in another forum APC pure sinewave was supported a lot, so I opted for that or else would have changed the batteries for APC 880VA for just 1600rs(apc make).
PS: Exide batteries is as good or better to APC or panasonic, which by the way is deployed in big server oriended companies, heck most companies.
