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[Sticky] Solar Power Output – Let’s Compare Generation Figures

 
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Solar Photovoltaic (PV)
Last Post by Toodles 23 minutes ago
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 Tim441
(@tim441)
Prominent Member Contributor
Joined: 3 years ago
Posts: 286
01/07/2025 1:25 pm  

@toodles June figures confirm my GivEnergy app AND portal both returning incorrect data 

😬😢

GIVENERGY
Import 579.1
Export 829.3
Solar 747.75

METER readings taken early on 1st june/1st July. Slightly out of sync. Will update with Octopus readings once they're in that app. Usually a day or so later
Import 939
Export 1227

Without doubt true solar prod is higher. Perhaps circa 900.

June 2024 was 853

June 2023 was unknown as inverter outage for 2 weeks. At a guess 800. May 760, Jul 652

June 2022vwas 773

Meter imports & exports seem right as I'm force charging batteries at night and force exporting in day (on IOG tariff)

Ideally would like to install another app to monitor solar in particular - not sure if that's possible without going to effort of installing Raspberry kit or something?

I have an EM115 meter in standalone  consumer unit ... I guess I need to look at those readings. Perhaps the EM115 has problems

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 1988
01/07/2025 2:13 pm  

@tim441 Bearing in mind my 8.1 kWp. array is not ideally orientated and that I do have some issues with part-time shading, my production is fairly respectable I think. I have 5 panels on the house roof (one being in proximity to the chimney) facing SWW, two on the old garage roof facing SE, four on a flat roof facing SE and ten garden mounted facing SSE. From May to September, the majority of panels are above any shade lines by ~09:30 and remain clear until ~18:00. Regards, Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 1988
01/07/2025 2:15 pm  

Oh, and I might add that each panel has its’ own Enphase IQ7A microinvertor. Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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