Solar PV Hints, Tips & Troubleshooting
Comments
-
-
Join Date:Posts: 7926
For everyone else's benefit, 269V and 281V(!!) is referenced in this ESBN document;
Conditions Governing the Connection and Operation of Micro-Generation (Section 2.2 Interface Protection Settings)
Solis have translated these settings into Solis parameter names here:
I'm not sure if anything else is configurable unfortunately.
Supply spec is 230±10%, but as per above the ESBN requirements for inverters are approx 230±17%. I presume this is to avoid solar PV inverters exacerbating issues around the fringes of supply spec.
Next time it happens follow the yellow ESBN vans up to Loughshinny 38kV station and see if any of them will let you in on what the cause is. 😉 Probably a ground fault on one of the other phases. If it is any help, my local 38kV station is also fed from Glasmore and I saw no issues this morning.
1 -
-
-
-
Advertisement
-
-
Now that's a bit cheeky! seems the 100W import bias was a bit too much but it gives a good place to start. I'll get my smart meter import data after the weekend and see what the offset would need to be. I'm thinking more like 15-20W but will see.
You can see the import below. It ended up that the battery was only covering the peaks. Base load is like a square wave due to the fridge-freezer.
Do you mean the offset? I don't think there's any front end for it and it's only on one specific version so far, not general release.
0 -
-
-
-
Advertisement
-
-
-
-
-
-
-
-
-
-
-
Advertisement
-
-
-
-
-
So my import and export issues are still ongoing. They scaled back the import to 50W but TBH it's still dancing around now, just importing about 1.5kWh per day instead of 2.5kWh. It seems that it struggles to provide power to the base load which is below 200W, so it jumps between import and export while the battery sits there doing feck all - unless an appliance or something bigger turns on.
What I did find that was if I set it to timed discharging it would provide the power from the battery. Lowest I could go was 4A which is about 200W or a bit above. That means a tiny export.
It begs the question, where the feck do I go from here? I've a hybrid system that doesn't want to use it's battery properly when DC power drops off. You can see where I set it to discharge about 11pm. No import and export is reduced also... but I don't think it's practical to set this on and off effectively manually controlling what should be the automatic self-use state.
Note that the import & export are from myenergi as the solis readings aren't showing half of this.
0 -
@silver_sky just had a look myself and I think it must be doing it too but not as much
At night while covering the base load it does seem to run at a constant export, as you can see sits under 0 most of the time but it's small enough, under 50w.
This data comes directly from a shelly CT on the mains cable so I trust this over the BS that Solis logs.
Willing to bet it does it for everyone to some degree and I would say the 20ms reaction time of the inverter is either not enough or the 20ms value is a lie like the 100a charge/discharge rates.
0 -
-
Any tips on making my Myenergi products less crap?
They do function correctly initially, in that they start charging when there is excess. But they don't stop.
My Eddi was trickling along like this all day, even though the car was plugged in and charging.
And although the car wills tart charging when there's excess, it won't stop when the sun goes down. It keeps on charging at 1.4kW.
Its a real waste of space currently as I always have to check and manually stop the charge via the app. Not so smart.
1 -
Sounds like you're on eco charging rather than eco plus:
Not sure where to change the setting (I've a wallbox but they've the same set of options: charge grid, charge sun only, prefer sun but take grid if it's dull)
0 -
Advertisement
-
