<div dir="auto">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.<div dir="auto"><br></div><div dir="auto"><<a href="https://theinverterstore.com/product/30kw-pure-sine-power-inverter-charger-300-vdc-240-vac-split-phase/">https://theinverterstore.com/product/30kw-pure-sine-power-inverter-charger-300-vdc-240-vac-split-phase/</a>></div><div dir="auto"><br></div><div dir="auto">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.</div><div dir="auto"><br></div><div dir="auto">Bob W9IZ</div><div dir="auto"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Sep 7, 2021, 10:40 AM Rick Green <<a href="mailto:rtg@aapsc.com">rtg@aapsc.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Tue, 7 Sep 2021, Andre wrote:<br>
<br>
> Why not use a offgrid PV inverter?, there are a lot of those available and <br>
> they can handle up to 800 V or in some cases even more.<br>
<br>
Actually, No. The offgrid inverters are generally designed for 46V DC input. <br>
The HV DC inverters on the market are mostly grid tie/ utility power synchronous <br>
only. I have not found one with a local clock source that will start and run <br>
without AC already present.<br>
There have been some experiments using a small UPS to power a 'nano grid' and <br>
fool the grid-tie inverter into starting. See Bob's website for links. <br>
I would suspect this arrangement to have some voltage regulation stability <br>
issues, The larger grid presents a very low impedance load, which does not vary <br>
radically when a single device starts up. With your home 'microgrid', the load <br>
can instantly double when your deepfreezer needs to start.<br>
It wqs mentioned in another post that the EVs on the market have 100-200amp <br>
DC-DC converters to maintain the 12v battery and accessories. So you could use a <br>
1.0 to 2kW 'trucker' inverter for essential loads only. Are there any <br>
200-350VDC to 48VDC DC-DC converters on the market, capable of supplying <br>
~250amps for a ~10kw off-grid inverter?<br>
<br>
-- <br>
Rick Green<br>
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