[Asterisk-Users] UPS rating for SOHO asterisk box

[Terry H. Gilsenan]

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Jean-Michel Hiver
> Sent: Wednesday, 1 June 2005 6:45 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box
> 
> Daryl G. Jurbala wrote:
> 
> >>-----Original Message-----
> >>From: asterisk-users-bounces at lists.digium.com
> >>[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> >>Jean-Michel Hiver
> >>Sent: Tuesday, May 31, 2005 5:22 AM
> >>To: Asterisk Users Mailing List - Non-Commercial Discussion
> >>Subject: Re: [Asterisk-Users] UPS rating for SOHO asterisk box
> >>
> >>    
> >>
> >[...]
> >  
> >
> >>Regarding this, I have done this hack yesterday:
> >>
> >>- Remove the battery from an existing UPS
> >>- Rewire the UPS onto biggest car lead acid battery (12v) you can 
> >>find.
> >>
> >>Et voila! Bigger capacity. Put the batteries in parrallel 
> and you do 
> >>get monstruous UPS capacity... the only trouble with it is that 
> >>re-charging the batteries may take some time.
> >>    
> >>
> >[...]
> >
> >Congratulations....you've just given this part-time small town fire 
> >marshal and 14-year fire service veteran nightmares.
> >
> >Kids....do NOT try this at home.  The inverters in small 
> UPSes are not 
> >designed to deal with runtimes that exceed the batteries in 
> them.  If 
> >you run this setup well past the time it was designed to run 
> (by adding 
> >3, 4, or more times that battery capacity it was ever 
> designed to have) 
> >that chances of a catastrophic inverter failure (meaning flash, boom,
> >fire) are very real and very likely.
> >  
> >
> Ouch...
> 
> In the test I have done, I replaced a HR 1224W F2F1 lead acid 
> sealed battery by a fulmen heavy duty 95 amp/hours battery.
> 
> The UPS flattened the battery out after 70 minutes instead of 
> the original 15 minutes. However, charging *is* slow: it's 
> been now 36 hours and it's still charging.
> 
> Looks like I'll be better off buying a proper smart charger 
> along with a decent inverter. I wouldn't want to fry the house :)

I have many sites that have a 35amp Charger with 2 x 400ah 900CCA deep cycle
batteries (10 year warranty), and 1000VA inverters.

The combination makes for perfect power and about 2.5 days run time with my
network kit whish consists of several Dlink wifi access points, 1 xbox
(hacked into a router/firewall) and a vsat system.

Total cost for the power kit AUD$1400 all up, and not a single second of
downtime in over a year.

On the flipside, I have seen a ups flare when the transformer overheated and
melted the varnish, nasty!

Regards,
T