Re: [RE-wrenches] Low voltage DC v. higher voltage DC

[Drake]

Can optimizers be used with the Sky Box?

At 07:38 PM 9/25/2018, you wrote:

A more recent spec sheet shows the MPPT window starting at 200v instead of 250v, which is a significant improvement.

Brad

On Tue, Sep 25, 2018 at 2:41 PM Dave Angelini Offgrid Solar <<mailto:offgridso...@sti.net>offgridso...@sti.net> wrote:

AEE had a training course webinar. The screenshot is from them and they
say October...

On Tue, 25 Sep 2018 11:49:10 -0700, Jay <<mailto:jay.pe...@gmail.com>jay.pe...@gmail.com> wrote:

> Hi all
>
> What is the news on the skybox?Â
>
> Last I checked it was still MIA
>
> Jay
>
>
>
>> On Sep 25, 2018, at 9:13 AM, Jeff Clearwater
>> <<mailto:je...@villagepowerdesign.com>je...@villagepowerdesign.com> wrote:
>>
>> Hi Dave and All.
>>
>> Reasons for HV batteries off grid?
>>
>> 1) Smaller cable size (I just did an 18 Kw off grid with 4 SIs and the
>> cable costs alone were in the order of $400) and increased flexibility
>> locating batteries and inverter.  10 AWG plug and play.
>>
>> 2) Higher efficiencies.  Easy integration on the DC bus.
>>
>> 3) Integration with GTBB battery tech and systems. Why have two
>> standards and two sets of equipment?  The line between Off Grid and
GTBB
>> will blur as more GT customers want more storage and more Off-grid
>> customers want the option of grid hookup at some point.   For
developing
>> countries as off grid micro grids grow they can merge.
>>
>> 4). Integration with Electric Vehicles as  storage for either GTBB or
>> Off-Grid - can integrate on the DC bus seamlessly.
>>
>> These are the reasons that seem obvious to me. I’d be surprised if the
>> manufacturers are not thinking this way. Though you may be right as I
was
>> surprised that Outback went 48V with the Skybox. And it’s been a hard
>> sell to get SMA to support US off-grid. If the equipment could do both
>> seamlessly they would have more market.
>>
>> And High Voltage safety is not really an issue with proper (standard
>> electrician) training and as the only electrician or customer interface
>> is a plug or set of small non-energized terminals. Having high voltage
DC
>> in you car is more dangerous. House fires are caused by amperage leaks
>> (much higher in Low V) (and shorted PB-acid) way more than voltage
leaks.
>>
>>
>> I’m off to SPI. I’ll ask them . . From what I understand Pika is
heading
>> that direction.  I imagine Powerwall too if they ever decide to support
>> off-grid.
>>
>> Best
>>
>> Jeff
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
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--
Dave Angelini Offgrid Solar
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