| Author |
looking for a 144V DC inverter...
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| danny burstein 2005-09-13, 2:24 pm |
| eyup, that's 144 VDC. 12 Volt ones are easy. 24 Volt ones
are fairly common as well. And 48V, while pricey, are
also off the shelf.
But 144VDC? Haven't found any...
Suggestions welcome. Thank you
--
_____________________________________________________
Knowledge may be power, but communications is the key
dannyb@panix.com
[to foil spammers, my address has been double rot-13 encoded]
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| danny burstein wrote:
> eyup, that's 144 VDC. 12 Volt ones are easy. 24 Volt ones
> are fairly common as well. And 48V, while pricey, are
> also off the shelf.
>
> But 144VDC? Haven't found any...
>
> Suggestions welcome. Thank you
>
We use black boxes from a company called EXELTECH. They are located in
Fort WEorth, Texas. I have a phisical address but no info on any web pages.
The one I have says:
DC 108V (Sys): 1.5 A @ 124.2V (Nom)
AC 117V 1.07 AS 60 hz.
I imagine they make something geared more to your 144Vdc requirement.
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| Contact Chad Lampkin of Michigan Energy Works. His phone number is
616-897-5161 or 616-340-5743. He manufactures high quality 3kw+ 144
vdc transformerless inverters. I have personally used his inverters
for about 17 years and wouldn't use anything else. Efficiencies are
much higher (95-98%) with high voltage.
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| Jim Baber 2005-09-21, 9:21 pm |
| Jim wrote:
Don't forget SMA Sunny Boy. They have a very complete line of
inverters. Mine (4) are running at 353-354 vpv (that's Volts from photo
voltaic) as I write this they are averaging about 900 Watts at 239 VAC
output, but it is 16:45 PM and that is well after my peak output. (Today
they peaked at 2125 Watts each about 13:15 PM.)
Jake wrote:
>Contact Chad Lampkin of Michigan Energy Works. His phone number is
>616-897-5161 or 616-340-5743. He manufactures high quality 3kw+ 144
>vdc transformerless inverters. I have personally used his inverters
>for about 17 years and wouldn't use anything else. Efficiencies are
>much higher (95-98%) with high voltage.
>
>
>
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| Solar Flare 2005-09-21, 9:21 pm |
| Cool! These inverters put out 240vac? What about a centre tap at 120vac?
"Jim Baber" <jim@baber.org> wrote in message
news:5pSdnXwNptXdbKzeRVn-vA@comcast.com...
Jim wrote:
Don't forget SMA Sunny Boy. They have a very complete line of
inverters. Mine (4) are running at 353-354 vpv (that's Volts from photo
voltaic) as I write this they are averaging about 900 Watts at 239 VAC
output, but it is 16:45 PM and that is well after my peak output. (Today
they peaked at 2125 Watts each about 13:15 PM.)
Jake wrote:
>Contact Chad Lampkin of Michigan Energy Works. His phone number is
>616-897-5161 or 616-340-5743. He manufactures high quality 3kw+ 144
>vdc transformerless inverters. I have personally used his inverters
>for about 17 years and wouldn't use anything else. Efficiencies are
>much higher (95-98%) with high voltage.
>
>
>
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| Solar Guppy 2005-09-21, 11:21 pm |
| The Sunnboy (Jim's are SB-2500U's) only sync's with household 240 vac grid,
they are not a stand-alone inverter. Not grid, no output. Also, as nice as
the Sunnyboy is it is becoming a dated design. There are more efficient
inverters and lower cost per watt as well
The original poster wanted as converter for 144DC , the lowest the Sunnyboy
will operate on is ~230VDC but needs a much higher "wakeup voltage" , from
the factory its configured as 300 VDC.
for the specs for all CEC certified inverters, from independent and verified
testing check out the CEC web-site at
http://www.consumerenergycenter.org...e_inverters.cgi
"Solar Flare" <sflare@hotmail.com> wrote in message
news:W4OdndO24sZna6zeRVn-vw@golden.net...
> Cool! These inverters put out 240vac? What about a centre tap at 120vac?
>
> "Jim Baber" <jim@baber.org> wrote in message
> news:5pSdnXwNptXdbKzeRVn-vA@comcast.com...
> Jim wrote:
> Don't forget SMA Sunny Boy. They have a very complete line of
> inverters. Mine (4) are running at 353-354 vpv (that's Volts from photo
> voltaic) as I write this they are averaging about 900 Watts at 239 VAC
> output, but it is 16:45 PM and that is well after my peak output. (Today
> they peaked at 2125 Watts each about 13:15 PM.)
>
> Jake wrote:
>
>
>
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| dirt farmer 2005-09-22, 12:21 am |
| > Contact Chad Lampkin of Michigan Energy Works. His phone number is
> 616-897-5161 or 616-340-5743. He manufactures high quality 3kw+ 144
> vdc transformerless inverters. I have personally used his inverters
> for about 17 years and wouldn't use anything else. Efficiencies are
> much higher (95-98%) with high voltage.
>
What kind of efficiencies are you talking about?
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| Chad's inverters are stand alone for battery charging. The 3 kw is
about 12" x 12" x 6" deep and weighs about 4 pounds. It draws 10 ma no
load. It doesn't have a sleep mode - It's always on, totally silent.
Efficiencies are 95+ and VERY trouble free.
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