[RE-wrenches] Battery / no-battery

[boB at midnitesolar.com]

On 10/27/2011 12:14 PM, Nathan Jones wrote:
> Gary,
> Sorry to interject on top of your previous reference to AC coupling. I had not read your post before replying. I am not aware of any way to use a single inverter for battery and non battery DC input. My thoughts with Williams first post was an AC coupled arrangement of some sort. I would think that if something like this was in development someone on the list would be aware of it. But then again,maybe they aren't talking.
> Nathan Jones
> Power Source Solar


I may have dreamed this, but I thought for sure that I saw a solar 
grid-tie inverter at SPI either one or two years ago that
had a 48V tap that could be hooked up to a battery.  This was not one of 
the main inverter companies
we use but some Asian company I remember....   Vaguely...   I remember 
that it was kind of odd but
not a real bad idea.  Most inverters do have an internal DC bus so this 
isn't totally out of the question.

If I could see a list of exhibitors from past SPI's, I might be able to 
remember.

boB





> On Thu Oct 27th, 2011 11:35 AM CDT Gary Willett wrote:
>
>> William:
>>
>> Like you, I'm unaware of an inverter that functions as grid tied/interactive, to which a battery bank can be added later to the same product.
>>
>> My guess is that Sunny Boy(s) would be installed first, followed by Sunny Island(s) if battery backup is wanted later.
>>
>> Same thing could be done with Schneider/Xantrex GT grid tied, followed later with an XW inverter/charger.
>>
>> Regards,
>>
>>
>> Gary Willett, PE
>> Icarus-Engineering LLC
>>
>> Icarus Solar Services LLC
>>
>>
>> On 10/27/2011 00:20, William Miller wrote:
>>> Friends:
>>>
>>> Is there such a thing as an inverter that does not need batteries today, but next week you can add batteries?  A potential client tell me a competitor is offering such an inverter.  I have a narrow field of experience with battery inverters:  Trace, Xantrex and Outback, so I might be unaware of a product.
>>>
>>> Thanks in advance,
>>>
>>> William
>>>
>>>
>>> Miller Solar
>>> Voice :805-438-5600
>>> email: william at millersolar.com
>>> http://millersolar.com
>>> License No. C-10-773985
>>>
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