writes "I am based in Thailand and I am responsible IT in all the offices for my company.
One office in particular requires a higher level of up-time than the other offices. This office has 12 PC's and one server. All the PC's were built with embedded Atom main boards and SSD's (to keep energy use down and uptime when on UPS) and the monitors are all 20in LCD and as a whole, draw around 150watts each on full load. The server, switch, CCTV and 2 ADSL routers draw about 500 watts all up. For any other wild cards (people plugging in phones to charge, desk fans, etc) I would round off the total Wattage up to 10KW to be safe. This would only cover the IT systems, no lights or A/C (Lights are already dc and have built in UPS that will last for 8 hours)
One thing to take note of is that power outages here are quire frequent. It can vary from 1 — 2 hours for one day a month to having 1 or 2 days without power for 7 or 8 days, especially during monsoon season. We would require a solid 6+ hours up-time from this system.
What are my options? Whilst the budget I have could be quite large if needed, I want to stray away from having to pay huge amounts for UPS as contrary to what most believe, anything IT is not much cheaper here!
I have read a few articles on Ghetto UPS systems using deep cell 12v batteries that can discharge to 90% safely. I have also toyed with the idea of using a generator paired with smaller UPS to cope with the change from mains to gen.
What are you thoughts? Are any other slashdotters in similar scenarios and having to deal with frequent power outages?"