[Tfug] UPS sizing

[johngalt1]

----- Original Message ----- 
From: "Choprboy" <choprboy>
To: "Tucson Free Unix Group" <tfug at tfug.org>
Sent: Wednesday, December 31, 2008 7:46 PM
Subject: Re: [Tfug] UPS sizing


> On Wednesday 31 December 2008 17:27, Zack Williams wrote:
>> tridges for APC units, glued
>> with the fuse/connectors installed for the same price as
>> two
>> batteries.
>>
>> They're very reasonably priced - an RBC7 for a SmartUPS
>> 1500 costs
>> about $115, which is about the same as online before
>> shipping, and as
>> these things weigh 25-35 pounds, shipping isn't trivial.
>>
>> - Zack

The reason this seems reasonable is because APC branded
replacements are fscking outrageously priced. (partially due
to the fact that the cost includes return shipping for
recycling.)

> There are better places to buy... You can get the
> replacement batteries for
> the RBC7 pack from Gruber Power in Phoenix (you just take
> the wires/connector
> off your existing pack and plug them on the new). Shipped
> and delivered in
> one business day for about $85 from their website (a bit
> better price if you
> get more or have a regular account), $65 from their Ebay
> store.
>
> http://www.gruberpower.com/gruberpower/advertising/Batteries/Batterypacks/apc/
>
> http://cgi.ebay.com/RBC7-UPS-Battery-RBC-7-APC-SU1250-SU1400-SU700_W0QQitemZ170290862817QQihZ007QQcategoryZ48479QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Agreed.

I uninstall the fuse first and replace it last. That way,
there won't be any potential across the terminals when you
install the wires and connector. Stick the batteries
together and protective caps on with double sided tape.

These batteries can generate large peak currents. On that
pack, even the fuse is pretty big - on the order of 100
amperes. So if you make a mistake and do something stupid,
it would suck to perform an unintentional welding experiment
with your ring, watch band, screwdriver, or pliers.