[RE-wrenches] Invert first?

[penobscotsolar at midmaine.com]

Dan,
   Is the Xantrex controller available/released yet? I've used the Classic
250 and the Apollo HV but have yet to see/use a Xantrex 600 Voc 
controller.....will anyone who has used one chime in and share their
experience ?



> Hi Eric;
>
> I'll be very interested to hear what others on this list who have far
> more experience than me in large systems have to say about this.
>
> But my first thought is, go DC. The new Xantrex XW high voltage MPPT
> charge controller will take up to 600 Voc from PV and put it into a
> standard battery bank, that roughly puts you realistically at just 30
> amps in your DC lines.
>
> How were you planning to invert to AC at the PV array? Enphase etc? How
> do you do battery backup with an Enphase system (I have no idea, but am
> eager to learn from others here)? Any standard islanding grid-tie
> inverter will need to be right next to the battery bank.
>
> Dan Fink
> Executive Director;
> Buckville Energy Consulting
> Buckville Publications LLC
> NABCEP / IREC / ISPQ accredited Continuing Education Providers
> http://www.buckville.com/
> info at buckville.com
> 970.672.4342 (voicemail)
> 970.373.1311 (fax)
>
>
>
> Eric Thomas wrote:
>> Wrenches,
>>
>> We are designing a super high end grid-tied w/ battery backup system for
>> a customer. Array will be ~15kW; pole or stand alone structure mounted;
>> 250' from home/batteries. My question is: does it make any sense to
>> invert the power at the array and use this ac to make the long run to
>> the batteries THEN connect to a typical battery charger rather than a dc
>> charge controller? Im mostly concerned with huge dc conductors making
>> this run across the property. Havent delved into the specific design
>> enough to size said conductors yet, or specify any equipment, but wanted
>> to know if im barking up the wrong tree ir not.
>> Thanks for the insight.
>>
>> Eric Thomas
>> Founder
>> Solar Epiphany LLC
>> NABCEP Certified PV Installer
>> WA Electrical Contractor # SOLAREL911NR
>>
>>
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