The UPS's I have used had current limiting on their charging circuits
and never had a problem running bigger external battery banks,but YMMV
depending on the design... However,lightning wasnt so kind. Anyone have
a surplus UPS FS?
kc2cjw wrote:
>The UPS w/ external battery is a great idea. One thing you need to
>watch however is the in-rush current of a nearly drained battery
>stack. If there was an outage which took the batteries down to
>where the UPS shut off, when A/C returned the batteries *might* want
>allot more food than the UPS's charger can supply.
>
>Restated, an array of large GelCels or Edisons capable of 200 Ah
>delivery will toast a 200 VA Triplite's internal charger. Trust me -
> there's a reason big battery arrays have large chargers.
>
>--- In Repeater-Builder@yahoogroups.com, [EMAIL PROTECTED] wrote:
>
>
>>Just to add to Russ, W3CH.
>>The local club in NJ that did
>>this did NOT install the battery's
>>in the UPS. That was not made
>>real clear. They sit next to
>>the APC brand UPS in two Sears
>>battery boxes. This has been working
>>on there repeater for well over a
>>year. Russ is correct it is very
>>cost effective back up power.
>>73,
>>Dean Westbrook, EE,PE.
>>Cook Towers, INC.
>>
>>
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