My EV can draw 48A (about 12.5kW) by itself, and of course the FlexBoss21 can only output 12kW on battery alone.  I am guessing that if the grid went down when the EV is charging, the inverter would shut down and the house would lose power.

My goal is to shed the EV load in this situation.  Either it should always be off when the grid is down, or it should be contingent on PV power and be shed fast enough that the inverter never shuts down.

It isn't clear that I can do this in the Smart Port settings.  It seems like they always require a policy based on SOC.  My goal here isn't to keep the batteries from draining (though obviously I also want to prevent that), but to keep the inverter from overloading.  I don't want to add another inverter simply to accommodate off-grid EV charging - I can do that easily enough with a generator, or by reducing the EV charging rate and changing the smart port policy to allow it (but I also don't want to permanently reduce my charging rate just to cover the scenario where it is charging and I lose the grid).

Is there a way to accomplish this?  

• add a feature in the PV charge priority mode which allows the inverter to increase the "PV Charge Power" in the event that solar clipping would otherwise occur;
• when enabled, PV charge priority would allow PV charge power to increase/decrease between set PV charge power and max PV output available as solar conditions vary
• if feature not possible within PV Charge Priority then suggest creating new working mode that would allow this mode of operation

Background

System:

• 15.6kW PV connected to 18kPV with 2x 14.3kWh EG4 indoor batteries with Gridboss

Grid connection & account type:

• net-metered account with 10kW to grid limit;
• Time of Use electricity account with lowest rates 11pm to 7am everyday & highest rates 4-9pm workdays (highest rate is approx 10x that of lowest rate)

working modes setup and logic: 

• goal is to have batteries at 100% by 4pm daily without wasting solar & maximizing solar export to grid
• 2300-0700 AC charge mode with weather optimize setup to charge batteries overnight during lowest rates
  • weather optimize SOC settings which allow for sufficient room to absorb any excess solar during the following day
• 0700-1600 PV charge priority with PV charge power set sufficiently high to allow system to not clip solar output
• 1600-2300 self-consumption mode to avoid highest electricity rate periods

issue:

• when setting PV charge power to approx 2.5-4 kW, the system begins to charge batteries before reaching the 10kW max grid export and usually charges the batteries too much by the time max solar output hits later in the day
• if the suggestion above could be implemented then I could set the PV charge power to zero which would allow solar to first power loads then grid export until such time that solar output increases sufficiently to maximize grid export; once at max grid export (or max combination of load/export reaches inverter's 12kW AC limit) then any excess PV could be directed to batteries

I have tried a number of different working modes however to date I have not been able to achieve what I am thinking is the optimal setup given the existing working modes.  If I have missed something regarding the other working modes, please feel free to offer some advice. 

Thanks,

Ian

• TOU Super Economy roughly 12am-4am

• Sun Hours roughly 9am-5pm (although varies by season, of course)

• No excess PV ever sent to the grid

1. TOU Super Economy end to Sun Hours start (i.e., 4am-9am)

    a. No charging

    b. Battery powered loads

    c. No grid usage except at minimum SOC or load exceeds battery/inverter capability

2. Sun Hours (i.e., 9am-5pm)

    a. AC Coupled Flexboss21 Load Port (or DC PV input or AC Coupled Smart Port) priority to charge the batteries or power loads

    b. Battery and/or PV powered loads

    c. No grid usage except at minimum SOC or load exceeds battery/inverter capability

3. After Sun Hours to TOU Super Economy start (i.e., 5pm-12am)

    a. Battery powered loads

    b. No grid usage except at minimum SOC or load exceeds battery/inverter capability

4. TOU period Super Economy start to TOU Super Economy end (i.e., 12am-4am)

    a. Charge batteries at maximum rate to achieve 100 SOC at TOU Super Economy end

    b. Grid powered loads

Based on my introductory understanding of the Working Mode Settings it seems like AC Charge Mode during TOU Super Economy, Self Consumption Mode after Sun Hours start to TOU Super Economy start and after TOU Super Economy end to Sun Hours start... Not sure about during Sun Hours because the AC Coupling of PV to the Load port seems to require AC Charge Mode to charge from the AC PV (load port) input... The problem is I want to charge from the Load ports input but NOT grid input...

I did find  the graph by day, which updates every 5 minutes, but it updates Power, not kWhr total.

I changed the graph to view by month, and the bars are showing daily total power generation, but "todays" bar does not seem to update. Is it possible to force an update, or set an auto-update period? I would have thought it would follow the parameter in settings and update every 5 minutes?

I'd really like to see the running total/graph of production and use for "today" in kWhr.... How can I do this?

Is there a decent step-by-step available anywhere?

or, a youtube?

My system install was just completed but I do not have any monitoring system yet.  I want to set up the system for self consumption to use the pv to power the loads, then the batteries, and the grid will kick in if there is not sufficient pv/battery power. No grid sell back ever.  There is not a working mode or self consumption option on the inverter window lcd.  What are all the settings that I need to check off in order to get it to operate the way i want.  I have 8 eg4 ll batteries and two solar arrays  consisting of 12 450 watt solar panels.  is there any detailed manual that explains all the settings in the lcd display .

I have high level flow diagrams that describe two common modes for my 18kPV:Grid Outage and Peak Shaving.  It's actually been tricky setting this up to match my desired flow.  I'm working with EG4 and Signature Solar on this, and scanning these forums.  Making progress, but not yet there.   If I figure it all out I'll share more ;)

2. Peak Shaving.  I've made good progress with EG4 assist (I'm peak shaving now!)  The settings are confusing at best, but can work.  Still need to trigger a Battery Quick Charge at the end of the process. Any ideas are appreciated.