[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:offgridsolar at sti.net>offgridsolar at 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.peltz at gmail.com>jay.peltz at 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:jeffc at villagepowerdesign.com>jeffc at 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
>"we go where powerlines don't"
><http://members.sti.net/offgridsolar/>http://members.sti.net/offgridsolar/
>e-mail <mailto:offgridsolar at sti.net>offgridsolar at sti.net
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