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Hybrid and more

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DamonHD:
Here is a press release for the IQ8:

https://newsroom.enphase.com/news-releases/news-release-details/enphase-energy-launches-iq8-industrys-first-microgrid-forming

Other brands (eg Outback I think) do inverters that restrict the amount that is exported to grid, to 0 if necessary.

Rgds

Damon

SparWeb:
That's true.  Outback, Schneider, and SolarEdge (and some others) have inverters that allow "self-consumption" modes that do not export to the grid, and prefer your generation system over the grid to minimize your consumption of electricity you must pay for.  This works, but it comes with specific installation conditions to make this technically possible.  For instance, if a temperature sensor switches on a large heating load in your house, then that's a drastic shift in the supply/demand balance within a fraction of a second.  The system needs to know exactly what's going on with your loads at all times.  It is absolutely not possible to do this with "I'll keep an eye on things then flip the switch here and push that button there".

You also need an extremely large generation system (lots of PV or wind) to keep up with winter demand (assuming you live in the Northern Hemisphere above (approx) latitude 40 degrees).

Yianie123.:
Thank you everyone for your input.  I have found the perfect hybrid inverter at a non-perfect price.  The Aims hybrid does everything I want, but the price is  way to high.  It seems that the only difference is a circuit and current transformers that measure the household load, then compensates with solar, battery or grid, without back feeding the grid. Any access will charge batteries.  But the price is $2700+.  That is a hard pill to swallow as compared to big screen tv, washer/dryer, or living room furniture.  Any any additional options are appreciated.

joestue:
https://www.amazon.com/dp/B0CFNPWXGD

https://www.amazon.com/dp/B0CGMWL9ZM

Looks like the term to search for is solar inverter charger to find the cheaper solutions.

Now as for your ac system, is it a hard starting compressor or an inverter?

You have to have a direct grid connection to handle the 140 amps locked rotor current.

https://www.renvu.com/Solis-10kW-S6-HV-Single-Phase-Hybrid-Inverter-with-Tigo-Transmitter

If your heat pump is an inverter, an isolated 400 volt dc power supply to supply the  dc bus directly, offsetting the utility load. You can use 60hz transformers to generate 265 to 280vac and a diode block to do this. The dc bus runs at 380v in many of them, i would only be concerned about trying to push to much power in through a small inefficient tx because under no load you may over volt ans it will trip an error code.

If you are willing, a single phase scroll compressor can be driven from a vfd. You need a 4 to 6 amp rated 120vac to 240vac transformer, and you may need an additional 208:32v transformer to push current through the capacitor aka start winding.

You can then augment the vfd with a 340v power source.

Lowest i would run a scroll compressor is 45hz due to the lubrication problems.

Yianie123.:
Thank you again, but the inverter must have current transformers that clamp to L1 and L2 to measure load from grid to panel.  Then supply the right amount of Solar or battery power and backup from grid if need be with feeding into the grid.

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