[RE-wrenches] Three-phase off-grid

[Ray Walters]

HI Allan;

I haven't tried the large Exeltech inverters, but I could see some 
advantages to having a separate charging system, and keeping the 
inverters supplying stable power. Everytime a generator coughs or 
switches from one source to another, it seems to cause trouble. The 
generator could be sized smaller, since it wouldn't need any surge 
capability. It would always run the same charger, and the inverters 
would always run the same loads. I'd at least take another look at it 
for my next large project, but cost might be a limiting factor.
Here's a Cummins diesel DC generator, just to think about: 
http://www.cumminspowerproducts.com/DCgensets/Other/10000500.pdf

Ray

On 10/21/2011 4:56 PM, Gary Willett wrote:
> Alan: Thanks for setting me straight about 3-phasing the Outback 
> Radian - I was not aware they are limited to parallel single phase 
> applications.
>
> Regards,
>
> Gary Willett
>
>
> On 10/21/2011 15:29, Allan Sindelar wrote:
>> Gary,
>> I was surprised by this information, as I had presumed that both 
>> units were for single-phase only. So I checked.
>>
>> Mary Raub in tech support at Outback told me that the Radian works 
>> only in 120/240 single-phase, although they are stackable in parallel.
>>
>> Someone in Schneider tech support told me that the XW can be used in 
>> three-phase, up to six units (36 kW). Setup instructions are in 
>> Appendix D of the XW installation guide, found online at 
>> http://www.global-download.schneider-electric.com/85257849002EB8CB/all/5CC689CC3CB7FD10852578BF005EA759/$File/xw-hybrid-inverter-charger_installation-guide%28975-0239-01-01_rev-e%29.pdf.
>>
>> Thanks, Allan
>>
>> *Allan Sindelar*
>> _Allan at positiveenergysolar.com_ <mailto:Allan at positiveenergysolar.com>
>> NABCEP Certified Photovoltaic Installer
>> NABCEP Certified Technical Sales Professional
>> New Mexico EE98J Journeyman Electrician
>> *Positive Energy, Inc.*
>> 3201 Calle Marie
>> Santa Fe, New Mexico 87507
>> *505 424-1112*
>> _www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
>>
>> On 10/21/2011 2:01 PM, Gary Willett wrote:
>>> Allan:
>>> Also, you might consider using six to nine Schneider/Xantrex XW6048 
>>> inverters, or six to nine Outback Radian GS8048 inverters, in a 
>>> 3-phase configuration, with a common battery bank.
>>> Also, Schneider/Xantrex has an 80A 600V charge controller that may 
>>> be advantageous depending on the distance from the PV arrays to the 
>>> inverters.
>>>
>>> Regards,
>>> Gary Willett, PE
>>> Icarus-Engineering LLC
>>>
>>> Icarus Solar Services LLC
>>>
>>>
>>> On 10/21/2011 10:17, Allan Sindelar wrote:
>>>> Wrenches,
>>>> We have been asked for a design for an off-grid system to reduce 
>>>> generator runtime for a mountain resort. Initial projections 
>>>> (consumption measurement results not yet available) suggest 15-20 
>>>> kW of PV and around 30 kW of inverter capacity. However, the 
>>>> generators and existing wiring are three-phase 120/208.
>>>>
>>>> My assumption is that our only options are a set of six Sunny 
>>>> Islands, or 9-12 Outback GVFX3648s. Are there any other options or 
>>>> approaches that I'm missing?
>>>>
>>>> Thank you, Allan
>>>> -- 
>>>> *Allan Sindelar*
>>>> _Allan at positiveenergysolar.com_ <mailto:Allan at positiveenergysolar.com>
>>>> NABCEP Certified Photovoltaic Installer
>>>> NABCEP Certified Technical Sales Professional
>>>> New Mexico EE98J Journeyman Electrician
>>>> *Positive Energy, Inc.*
>>>> 3201 Calle Marie
>>>> Santa Fe, New Mexico 87507
>>>> *505 424-1112*
>>>> _www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
>>>>
>>>>
>>
>>
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