I am looking for a high voltage standalone DC to AC inverter that can
take a 300V-500V DC input and generate a pure sine ware 120V and/or
240V AC output. It needs to be able to handle at least 2000W.

I am looking for a non-grid-tie replacement for a <a
href=http://www.cosolar.com/catalog/cat_grid_tie.htm>Sunnyboy
2500U</a> grid-tie inverter for use in a solar system. I want to avoid
the need to rewire the pannels, thus the requiement for the high input
voltage.

Hello bigjosh,

I hope I didn't seem to jump to any quick conclusions. I work in this
field quite often, and as you noted, this is probably a bit expensive.
Finding similar solutions would cost about the same, and of course,
custom solutions will cost even more. It's expensive for the
maufacturer as well, so they probably only carry several assets at any
given time.

As noted, here is the one seemingly good product I was able to locate
:


Product : 6kva Ace Series 
Company : Transistor Devices 
Inputs  : 24, 48, 120, 270, 400VDC with 75% to 130% range (@520V max)
Output  : 50Hz, 60Hz or 400Hz Factory Set - 2% independent of input 
Rating  : 6kVA Nominal, 7kVA Overload 
URL     : http://www.tdipower.com/pro_industrial.htm 
Notes   : Many more listed on the same page.


Here is a company in Wisconsin that states they can make custom DC to
AC inverters that may also be worth a closer look, although the ones
they do carry are smaller and have a maximum DC input of 48 volts :

TSi Power
1103 West Pierce Ave
Antigo, Wisconsin 54409
800/874-3160 
http://www.line-conditioner.com/DC-to-AC-Inverter.htm
Note : Statement is at the bottom of the page


I was able able to find two more companies, who proudly display the
fact that they can offer custom power conversion solutions. They are
however, not located in the United States. Again - we are probably
talking high dollar items, but it may be worth a look :

Pivotal Power (Canada)
http://www.pivotalpower.com/

Amalgen Technologies
http://www.amalgen.com.au/power_electronics/inverters.asp


For your comparison and notes (extended project information), you may
want to have a look at this company. They list relative prices on the
site, and claim they offer financing, although the layout can be
rather hard to read. They may be willing to offer a partial solution :

CiSolar
http://www.cisolar.com/Catgrid.html


I hope this answers your question to your satisfaction. I wish there
were more suitable resources for your request in a moderate price
range, but at least we have a solid starting point.


To assist with this answer I searched Google for :

high voltage "dc to ac" inverter
://www.google.com/search?q=high+voltage+%22dc+to+ac%22+inverter

high voltage "dc to ac" inverter 500
://www.google.com/search?q=high+voltage+%22dc+to+ac%22+inverter+500


Thanks for the very challenging question. Should you need any
clarification, please do not hesitate to ask. I am willing to help as
much as I can.

SgtCory

Hello bigjosh,

This is a tough one, mainly because of the input. I was able to find
one that seems to fit your requirements. Most others I was looking
into can't meet your VDC input requirement.

If you can accept this one good product as an answer, I can post it
and look for some more custom solutions. How many products you were
expecting to find that are not custom made for your answer?

Here's the one I found :

Product : 6kva Ace Series
Company : Transistor Devices
Inputs  : 24, 48, 120, 270, 400VDC with 75% to 130% range (@520V max)
Output  : 50Hz, 60Hz or 400Hz Factory Set - 2% independent of input
Rating  : 6kVA Nominal, 7kVA Overload
URL     : http://www.tdipower.com/pro_industrial.htm
Notes   : Many more listed on the same page.

This unit does indeed fit the requirements stated in my question
exactly - please repost as an answer.

The question is, how much do they cost? (They look very expensive)

I'll try to get pricing info tommorow and post a comment.

Thanks!

The comments somehow missed my attention until I was already answering
your question - I came to much the same conclusions as sgtcory.  I'm
glad I didn't accidently hijack someone else's commission:

The folks at Transistor Devices Inc. seem to have several products
that might fit the bill:

Up to 2500W:
http://www.tdipower.com/acp/pdf/ace.pdf

Main inverter page with more options:
http://www.tdipower.com/acp/prod.htm

Pricing appears to be by quotation only which may be a bad sign.

(successful) Search terms:
500V DC-AC inverter

-Haversian