On Fri, 4 Dec 2009, kd4e wrote:
> Good info.
> What I need is a good UPS that doesn't generate hash while
> recharging, maintenance charging, or inline use during a
> grid failure.
> My goal is for everything important to function off-grid
> but I am a long ways from that.
> What would you recommend in the way of a UPS (600W or more)
> that is RF-quiet, reliable, and provides for external
> batteries so the time-up may be extended (without melting
> the inverter)?
1) Large station battery pack (I like the Concord Lifeline AGMs) with a
good PS/smart charger like an IOTA unit. (NEVER NEVER NEVER play with wet
cell or other batts that are not ultra-low outgass types inside. Too many
risks with outgassing or spillage.)
2) 1000 - 2000 watt quality/quite inverter, assume you will need to
build/buy DC side filters and install ferrite on output, maybe an isobar
ultra as well (Isobars, 6 and 8 outlet models seem to have very good
common/diff mode filtration below 2Mhz).
That takes care of the shack.
3) 100ft *heavy* extension cord, I have a nice 6ga silicone jacket one,
meant for running a block heater. More than enough to temp power a 600w
load on the other side of the house.
4) 1000i or 2000i Honda genset
I have 1, 2, 3 though the batt bank is only 210amp/hr (growing by
105amp/hr every 6 months).
I only bother with the inverter if I want to keep a computer up, or watch
TV during an outage.
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