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Grid Tie Inverter with battery options?
#11
Though noone have 6ph at home. 3ph is more common. So its not relevant in this discussion though
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#12
(08-15-2019, 05:11 PM)not2bme Wrote: Schneider Conext XW+ and Outback GS. They both are grid-tie capable and are 48V. Both are I believed to be certified in the US.

On a side note the original GS was designed by the same engineer as the XW, back when it was Trace Engineering and he moved to Outback then I believe to Midnite.

Thank you for these suggestions!  I will take another look at the Conext.  I did not know about the Outback GS.  It seems to be certified.   At first glance it appears to do what I want, but approaching twice the cost of the StorEdge.  $4300 for an 8kva outback vs $2400 for 7.6kw storedge.  I think the outback has more surge capacity, which is very desired.  The outback has a 34w idle current and the efficiency from 0-2kva goes from 0 to ~90% more or less linear.  So a 1kva load is around 50-60% efficient.  If I am going to run it at night when my house is mostly at idle, couple hundred watts, it will run quite inefficiently.  
I need to spend some time with the manuals.
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#13
(08-20-2019, 06:40 PM)rearden Wrote:
(08-15-2019, 05:11 PM)not2bme Wrote: Schneider Conext XW+ and Outback GS. They both are grid-tie capable and are 48V. Both are I believed to be certified in the US.

On a side note the original GS was designed by the same engineer as the XW, back when it was Trace Engineering and he moved to Outback then I believe to Midnite.

Thank you for these suggestions!  I will take another look at the Conext.  I did not know about the Outback GS.  It seems to be certified.   At first glance it appears to do what I want, but approaching twice the cost of the StorEdge.  $4300 for an 8kva outback vs $2400 for 7.6kw storedge.  I think the outback has more surge capacity, which is very desired.  The outback has a 34w idle current and the efficiency from 0-2kva goes from 0 to ~90% more or less linear.  So a 1kva load is around 50-60% efficient.  If I am going to run it at night when my house is mostly at idle, couple hundred watts, it will run quite inefficiently.  
I need to spend some time with the manuals.

Does the StorEdge work in 2 way using the grid? Meaning will it charge the battery off the grid if you don't have solar producing? As far as I'm aware all SolarEdge products require a DC input from solar to invert. This may be an important point if you already have solar the Radian, Conexant and Magnum inverters can all AC couple.
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#14
(08-20-2019, 06:40 PM)rearden Wrote: Thank you for these suggestions!  I will take another look at the Conext.  I did not know about the Outback GS.  It seems to be certified.   At first glance it appears to do what I want, but approaching twice the cost of the StorEdge.  $4300 for an 8kva outback vs $2400 for 7.6kw storedge.  I think the outback has more surge capacity, which is very desired.  The outback has a 34w idle current and the efficiency from 0-2kva goes from 0 to ~90% more or less linear.  So a 1kva load is around 50-60% efficient.  If I am going to run it at night when my house is mostly at idle, couple hundred watts, it will run quite inefficiently.  
I need to spend some time with the manuals.

Bottom line is you must expect inefficiencies in the system. Those graphs might be misleading though, so if you think if the linear scale is accurate then you might want to confirm by contacting the manufacturer. I think they err on the conservative side and may be better than you think. I wish I had some data for you but my XW+ is still in the box and I plan to take some data during the build when I find the time! For example my current inverter the PIP2424lv is about 80% efficient at about 400W monthly average and 75% efficient at around 250W monthly average. That's a 3000kva inverter.

You can always throw more panels and batteries to overcome the inefficiencies. You can also redesign by having multiple smaller units with higher efficiencies at lower ranges so you can have slave units that only power up when the extra power is needed. Therefore it is in power save mode (typically under 5W).


I looked up the StorEdge website and I couldn't make heads or tails on the units.
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