I would like to invert up to 1500W of PV power to help feed domestic load and use any PV surplus (if any) to charge the battery.
Examples:
1000W PV, load > 1000W : invert all
2000W PV, load > 1500W : invert 1500W & send 500W to battery
2000W PV, load = 1000W : invert 1000W & send 1000W to battery
Said differently : load has priority up to 1500W.
Is there a Victron equipement(s)/setup that can achieve this ?
All of them will need some kind of programming to achieve this, but in short yes.
The multi rs is the easiest to set up. Is an all on one programmed over bluetooth.
More serious systems and control use the ESS assistant and a multiplus or quattro with a GX and mppts.
That being said if you are a programmer the multi rs can also be manipulated as well.
Thank you Alexandra. I am a professional programmer (20 years experience).
I looked at the manual for Multi RS Solar, but I'm not sure how I would achieve conditional PV power distribution. Section 4.8. says it can be programmed with VE.Direct (no further details), section 4.12. "Programming with VictronConnect" mentions no control based on power, except for ignoring AC input when loads are low (4.12.5). ESS controls (4.12.7) caters to the battery (keep charged, sustain, ..).
How would you go about programming the Multi RS Solar for my declared purpose ?
There are quite a few settings for the balance.
You can control the battery charge amps in the system.
Battery discharge level as well.
In Victron systems DVCC is how that is often done. Varying that figure changes where the solar goes. And ofcourse you can smart switch loads on and off as well.
The GX is how it is done look up venus OS large and Node Red. Root access to the GX allows custom scripts.
Alot of guys use modbus as well and home assistant integrations. The modification section on the forum and git hub is loaded with ideas and experiments.
Ok, I now understand what you mean by "programming".
When it comes to that, I would rather use a Unix like OS (Venus OS), there I'm right at home.
Indeed, if scripting, although DVCC sets a hard limit for DC current, if that limit can be programmatically updated based on inverter output load, PV power can be regulated (to any criteria, actually). DC load, if present, can be accounted for by means of a Victron shunt (add to inverter load).
I'm not sure how familiar with the Victron solutions you are, but to your knowledge this really can only be achieved via programming ?
I have a fairly simple working knowledge (can load drivers and a few basics) but node red is where i am comfortable and regularly use that.
