Stiebel Eltron Servicewelt COP figures compared with OpenEnergyMonitor
We have a Stiebel Eltron WPL25 ASHP with access to lots of data via their Servicewelt portal. This includes data on heat produced, power consumption and COP. This data is created using a proprietary algorithm. I'm trying to get a figure for percentage uncertainty for this data, but so far SE are unable to provide this. They say that their data is a guide. Question: has anyone fitted OpenEnergyMonitor level 3 (with heat meter) to a SE heat pump and compared actual measurements with the data SE provide?
@shaeney are you running OpenEnergyMonitor?
Buy Bodge Buster – Homeowner Air Source Heat Pump Installation Guide: https://amzn.to/3NVndlU
From Zero to Heat Pump Hero: https://amzn.to/4bWkPFb
Subscribe and follow our Homeowners’ Q&A heat pump podcast
I also have the WPL25.
I find the Steibel Eltron Portal very, very basic.
So I also run a Home Assistance Green Pi, which gives me far better information and graphs/visuals. However, its integrated with the SE data via CanBus. So its their data, as opposed to a separate monitor.
I do have a SunSynk inverter with a CT clamp on the entire supply, so I can kinda see whats happening at a higher level too.
So today so far, total consumed is 40KWH
EV took 20KWH
Battery charge took 12KWH
Heat Pump is reporting 3 KWH on Hot Water and 4KWH on Heating.
So I think it's there, or there abouts correct.
Hope this helps!
@shaeney thank you. SE have 2 portals. The standard offer is very basic - connects to the WPM (HP manager/controller), but the online portal is much more comprehensive: https://servicewelt.stiebel-eltron.de/ You need an account and have access to everything as far as I can see. You can select parameters and graph over periods of time. You need to call them to get access.
I have billing quality meter on the compressor supply, and a CT clamp on the controls/pumps supply. If I compare the kWh used between this meter and what SE is recording for the compressor via the portal, I am getting 7% difference - actual use is 7% higher than SE is presenting.
The problem is that I have no way of measuring the actual heat produced (I don't have OpenEnergyMonitor) - so I have no way of working out the margin of error for the heat produced data provided by SE (ie, is this also 7%?). So I can't assign a margin of error figure to my COP calculations.
I am preparing a presentation for a village meeting on heat pumps and I want to be as rigorous as possible with my data. This is the video we created for our project which is to encourage retrofitting: https://www.youtube.com/watch?v=Ucf0-L8y9Q0
- 21 Forums
- 1,962 Topics
- 42.6 K Posts
- 69 Online
- 2,277 Members
Join Us!
Heat Pump Dramas?
Thinking about installing a heat pump but unsure where to start? Already have one but it’s not performing as expected? Or are you locked in a frustrating dispute with an installer or manufacturer? We’re here to help.
✅ Pre-Installation Planning
✅ Post-Installation Troubleshooting
✅ Performance Optimisation
✅ Complaint Support (Manufacturer & Installer)
Latest Posts
-
RE: Volumisers in Heat Pump Systems: Does Placement Matter?
@jamespa Agreed. I think it’s a case of much over muchn...
By Mars , 38 minutes ago
-
@eliuccio Unfortunately, whilst I agree with a lot of...
By JamesPa , 1 hour ago
-
RE: Newbie out of her depth – Samsung AE120RXYDEG 12kW heat pump
@bami I think if the heat loss documentation matches a ...
By bontwoody , 1 hour ago
-
RE: What is the best strategy for operating a very oversized heat pump?
@jamespa I'm afraid that's over my head but if anyon...
By IRMartini , 2 hours ago
-
RE: Setback savings - fact or fiction?
And here in case any one wants it is the code I used in...
By cathodeRay , 2 hours ago
-
RE: Samsung Gen 7 R290 12kW is not behaving how I expected
Definitely its in the 20xx FSVs. Conversely it may be...
By JamesPa , 2 hours ago
-
RE: Towel rails. An unexpected final hurdle
We have both Normal Rad for heating the room and then a...
By IRMartini , 4 hours ago
-
RE: Heat Pump Sizing & Installation Costs
Perhaps useful to have installed date too? To get conte...
By Tim441 , 6 hours ago
-
RE: SolarPV tables / online calculator
I'd be interested what others find whilst using that we...
By Majordennisbloodnok , 8 hours ago
-
RE: F.788 Building circuit pump reports internal fault - Vaillant Arotherm
Guess I have to wait for engineer visit. I really hope ...
By jeegnesh , 20 hours ago
-
RE: Act now to defer the UK road tax increase on EVs
@majordennisbloodnok Damn right sir. my attempt at iron...
By Jancold , 23 hours ago
-
RE: ASHP and heating issues in new build house
That’s good gives you more capacity. It made me think, ...
By Terry1812 , 1 day ago
-
RE: Seewet manhole cover within r290 exclusion zone
Thanks! I asked Vaillant, and they say I should be fi...
By dbrb2 , 1 day ago
-
Looking for the Grant Aerona 3 setting to turn off completely at 20 OAT
I'm running my Aerona 3 on WC and the 'warm end of that...
By damonc , 1 day ago
-
RE: Do I just go with the lowest quote for my heat pump?
So after signing in Sept in two weeks the install may s...
By Jancold , 1 day ago
-
RE: Victorian Semi Retrofit / Extension ASHP and UFH Advice
When you are renovating is always a good time, as it ma...
By JamesPa , 1 day ago
-
RE: Just one room not reaching desired temperature
Looks like this issue is now resolved. Aira installed a...
By ChandyKris , 1 day ago
-
There have been several people on the OpenEnergyMonitor...
By RobS , 2 days ago
-
RE: Say hello and introduce yourself
Good point @jamespa But that probably strengthens @ch...
By Transparent , 2 days ago
Latest Topics
-
Heat Pump Sizing & Installation Costs
By Mars 8 hours ago
-
Volumisers in Heat Pump Systems: Does Placement Matter?
By Mars 9 hours ago
-
SolarPV tables / online calculator
By MichelleC 16 hours ago
-
By Toodles 2 days ago