Solar panel production figures

Bumper day today, almost 40 kWh exported.

SolarEdge: 12.8 kWh
Garage: 7.81 kWh
North west roof: 5.99 kWh
House rear wall: 6.54 kWh
Peak power was 5.97 kW at 13:24

Total generated today: 33.14 kWh
Total exported today: 39.464 kWh
Total imported today: 23.341kWh
 
Givenergy app says 12.64kw, Solis says 13.9... so maybe somewhere in between?????

To be fair the Solis may be more accurate today as I was messing about with the electrics (unrelated) and kept shutting the AC inverter down.

Anyway, that's absolute max today the curve was perfect, all be it we get shading from next door from about this time of year till about mid March.
 
I have a slight difference between my Solis and GivEnergy readings, I put it down to the solis reading DC and the GivEnergy reading AC via a CT clamp which is likely to have a bit of tolerance. Sometimes they are pretty close, others they can be a bit out.

Likewise when I check my GivEnergy export reading vs my smart meter, my smart meter is consistently higher by a few %.

It’s all within an acceptable margin of error mind.
 
Last edited:
An uninspiring 14.3: kWh

On a separate note, updated photo @Simon D
Simon D said:
Octopus is now installing my Heat Pump should be finished on Friday.;)

Monday 7.37 kWh
Tuesday Only 3kWh as I had to shutdown the system for Octopus
Wednesday 14.85 kWh
Thursday 10.18 kWh
Click to expand...
Of heat pump ducting adjacent to West facing panels now scaffolding down:

ibb.co

Screenshot-20241021-103357-2 hosted at ImgBB

Image Screenshot-20241021-103357-2 hosted in ImgBB
ibb.co ibb.co
 
john_smith said:
My curve plummet from 13:40 :-(
Click to expand...

I corrected that for you :p

b0rn2sk8 said:
I have a slight difference between my Solis and GivEnergy readings, I put it down to the solis reading DC and the GivEnergy reading AC via a CT clamp which is likely to have a bit of tolerance. Sometimes they are pretty close, others they can be a bit out.

Likewise when I check my GivEnergy export reading vs my smart meter, my smart meter is consistently higher by a few %.

It’s all within an acceptable margin of error mind.
Click to expand...

My Solaredge total has always read higher than the generation meter. I have an ET112 energy meter on the Solaredge cable, so the Victron can see what it's generating and that is very accurate when compared to the generation meter. The Victron system is always 5% over on import and export compared to the smart meter, so I always use the smart meter readings, which HA can access.

I think one of the differences is the Solaredge reports actual generation but the inverter uses some power itself so what the generation meter and ET112 see is what's left over. Yesterday the SE dashboard reported 13.2 kWh and my Victron system reported 12.8 kWh, but that's only 400 wH and I'm sure the inverter would use more than that, so likely other inaccuracies, perhaps caused by measuring the DC generation as you say.

CT clamps are pretty poor at reading low currents, and I'm guessing the Victron Quattro uses CT clamps internally to monitor what I'm drawing from the grid, hence it's inaccuracies.
 
How have you managed to get home assistant to read your smart meter data in real time?

I’ve got an Octopus home mini on mine and it can read import ‘live’ but not export. My neighbour has a home mini on his and he can see live import and export but he has a different smart meter.
 
Last edited:
b0rn2sk8 said:
How have you managed to get home assistant to read your smart meter data in real time?

I’ve got an Octopus home mini on mine and it can read import ‘live’ but not export. My neighbour has a home mini on his and he can see live import and export but he has a different smart meter.
Click to expand...
i cant get live export on my mini either. Export is next day for me
 
b0rn2sk8 said:
How have you managed to get home assistant to read your smart meter data in real time?

I’ve got an Octopus home mini on mine and it can read import ‘live’ but not export. My neighbour has a home mini on his and he can see live import and export but he has a different smart meter.
Click to expand...
I use a Hilderbrand Glow IHD, it doesn't give live export power (see below), so that figure for HA is taken from my Victron system. HA connects to the Glow display via MQTT, as it does to the Victron system as well.

Some smart meters have a bug in their firmware that means they don't report live export power, they only report live import power. You get access to all the kWh/meter readings though throughout the day.
 
Ron-ski said:
My panels are more west than north, they are west north west. They generated pretty much 25% of yesterdays generation, there is 5.22kWp of panels, or 33.6% of my total capacity.

Which way does yours point, and what's the ratio? Their generation seems really low compared to the others, or is something shading them now?

Edit: I see from PV Output that it's 18x SE, 11x NW, so I'm surprised that the NW panels are producing so little.
Click to expand...

They are more NNW really, 327* ish. They aren't shaded at all. Some solar calculations shows that today the sun dipped below the horizon at 249* vs July where it is setting at 312*. I expect your WNW panels will fare rather better for a few more weeks :)
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom