[aprssig] Emergency power from your EV/Hybrid

[Bob Poortinga]

Probably overkill for most applications, but there are larger off-grid
inverters out there that can take high voltage DC input such as this AIMS
30kw model. The specifications state that it can handle up to 600v DC input.

<
https://theinverterstore.com/product/30kw-pure-sine-power-inverter-charger-300-vdc-240-vac-split-phase/
>

I'm sure that there are others out there that fit the bill. This is an area
that is seeing new models being introduced regularly.

Bob W9IZ


On Tue, Sep 7, 2021, 10:40 AM Rick Green <rtg at aapsc.com> wrote:

> On Tue, 7 Sep 2021, Andre wrote:
>
> > Why not use a offgrid PV inverter?, there are a lot of those available
> and
> > they can handle up to 800 V or in some cases even more.
>
>   Actually, No.  The offgrid inverters are generally designed for 46V DC
> input.
> The HV DC inverters on the market are mostly grid tie/ utility power
> synchronous
> only.  I have not found one with a local clock source that will start and
> run
> without AC already present.
>    There have been some experiments using a small UPS to power a 'nano
> grid' and
> fool the grid-tie inverter into starting.  See Bob's website for links.
> I would suspect this arrangement to have some voltage regulation stability
> issues, The larger grid presents a very low impedance load, which does not
> vary
> radically when a single device starts up.  With your home 'microgrid', the
> load
> can instantly double when your deepfreezer needs to start.
>    It wqs mentioned in another post that the EVs on the market have
> 100-200amp
> DC-DC converters to maintain the 12v battery and accessories. So you could
> use a
> 1.0 to 2kW  'trucker' inverter for essential loads only.   Are there any
> 200-350VDC to 48VDC  DC-DC converters on the market, capable of supplying
> ~250amps for a ~10kw off-grid inverter?
>
> --
> Rick Green
>
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