Re: (ET) [SPAM] Re: UPS

["Chapin, Tim" <tchapin bf umich edu>]

I wish I was closer, I would bid on them my self..... but here you go
36vdc ups.  Looks very reasonable.    Auction of 3 with 6 back up packs.

Set up a couple tractors with good charger plus house backup unit and a
3rd with a string of packs on it for a long running backup.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=9710968176&rd=1&sspag
ename=STRK%3AMEWA%3AIT&rd=1


-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of Tim
Sent: Tuesday, April 11, 2006 9:41 PM
To: jeremy gagliardi com; ET
Subject: [SPAM] Re: (ET) UPS

Jeremy,

I use a Tripp Lite PowerVerter Alternative Power Source (APS) 3636VR 
which can function as an extended run UPS system or as a mobile DC to AC

power inverter that will recharge its battery source.  This is pretty 
close to what you are looking at, minus the extra smaller 36v source.  I

have had this for approx 3 years and it works great...also used it to 
power my house a couple times for parts of a day.  If I had to do it 
again, I would look at the 2400 watt version and see if Tripp Lite could

modify it to run on 36v VS. 24v.  The new multistage regulated chargers 
in these inverters are definitely better and more efficient than the 
Electrak original.

Here is more info on my setup:

http://www.austinev.org/evalbum/471.html

http://www.ustow.com/Elec-Trak/Tims_E20/

Hope this helps.

Tim



jeremy gagliardi com wrote:

>I've been toying with the idea recently of getting a medium size UPS
that runs on 36VDC.  The idea is to get a unit with its own battery, but
also has an external battery interface to hookup to my ET's battery pack
for backup power to keep some computer/networking systems I have at home
always on (my phone is VoIP, plus 2 servers and a PC).
>
>I've been looking at several Tripp Lite models that are known to
operate on 36VDC and have an external battery pack interface.
>
>In particular, I have my eye on this model...
>http://www.tripplite.com/products/product.cfm?productID=2664
>
>I know UPS's always want to control the batteries attached to them, and
thus will charge them when they get low.  I also know that in the
various "hot swap" UPS models, that when batteries are disconnected, the
UPS's still function without interruption.
>
>My questions to the ET group are:
>(1) Has anyone successfully used a UPS to recharge the big batteries of
an ET?
>(2) Is it better/worse than the stock charger in an E20?  With Landis
controller?
>(3) Does anyone know where to get quick disconnects for high gauge
wire, required for a 36VDC external battery hookup?
>
>Note, I have not looked at inverters, because the idea is that a UPS
would remain functional (on main power) and have its own internal
battery when the ET is disconnected and in use.  When the ET returns, at
first the ET would recharge off the UPS, and when needed it would
provide extended battery run-time for especially long power failures
(such as the wires in front of the house being damaged, which has
happened to me and caused a 4 day outage).
>
>(---------------------------)
> mailto:Jeremy Gagliardi com
> http://Jeremy.Gagliardi.com
>(---------------------------)
>
>
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