#myenergi — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #myenergi, aggregated by home.social.
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12 months electricty costs to Jan 2026
https://u3a.social/display/c66bfb1b-1869-7f9a-8b48-622593479090
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Year to October electricity costs
https://u3a.social/display/c66bfb1b-1769-2ea1-5235-637586336994
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@CatherineFlick I think they are struggling, but maybe try myenergi.info forum.
My bug bear is lack of local API (you'll loose control of your devices should myenergi fail).
Still, they do seem to be pushing out beta builds of the libbi software, so maybe not all is lost.
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#myenergi seemed to make some changes on the server so charge-from-grid and max charge functions disappeared.
https://myenergi.info/charging-libbi-from-the-grid-t15566-s10.html
https://myenergi.info/charging-preference-slider-for-libbi-grid-charging-t15609.html
fustrating ...
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Yea! The last 12month home electricity was negative, ie I made a profit.
Thanks to #solar, #myenergi (#zappi + #libbi) #octopusenergy, #homeassistant I averaged -£2.33 per month ... thats including hot water and car charging.
I think the biggest effect was the lowering of the standing charge in April ... but also improving automations and making use of octopus saving sessions & free electricity.
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@monotoneTesco I have a #myenergi hybrid inverter/battery (https://www.myenergi.com/product/libbi-battery-storage/) and #marley integrated panels (https://www.marley.co.uk/solar-roof-tiles/solartile)
A little more here https://plord.co.uk/blog/home-electricity-1-year-update/
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Last year's average monthly electricity cost was £1.04, including electric car charging and hot water. So export solar as much as I can, charge house battery over night with cheap electricity and automate everything. Make money over summer that covers most of the winter costs.
#octopusenergy #octopusintelligent #solar #battery #myenergi #homeassistant
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Home electricity – 1 year update
(see https://plord.co.uk/b/8vd)
A year or so ago I presented How to reduce your electricity bill to zero talk (initially over on u3acommunities.org computing group) – it’s now been running for a year, so time to check progress.
General approach
After getting my solar + house battery installed, I’ve tried to reduce my electricity (£ and carbon footprint) as much as possible by :
- Choosing a good tariff plan from energy supplier
- Charge house battery when electricity is cheap
- Use house battery to power house when electricity is expensive
- Use solar to top-up house battery and sell excess back to the grid
- Heat hot water tank when electricity is cheap
- Use any special deals from energy supplier
- Automate with Home Assistant
My specific
This is what I have :
- Octopus intelligent go tariff for electricity import – so overnight I’m charged 7p/kWh. I also get the 7p/kWh when I plug my car in (at which point the whole house gets the rate). Octopus determines when exactly my car is charged based on my requirements. The daytime rate is currently 27.7p/kWh but thats less important since I rarely use it.
- Octopus outgoing tariff for electricity export – this pays be 15p/kWh for anything I can export back to the grid
- myenergi zappi, for car charging, and a myenergi libbi for house storage (with just a 5.1kWh battery)
- 4.5kW peak solar facing south-east (so catches the morning sun)
- Given the above, my main home automation rules via home assistant rules are :
- Charge battery when electricity is cheap (overnight + car charging)
- Heat hot water via immersion heater so that it’s up to temperature as the cheap rate finishes
- If the battery has any charge left at the end of the day, export to grid just before cheap rate starts
- During cheap rate, once battery is charged, export & re-charge
- Join octopus saving sessions (if its worth it)
- During cheap rates enable some ancillary devices (like tool battery charging, pond pump)
- Make use of free electricity when available
- Use a calendar to disable some automations when away
1 year results
Solar was pretty good this year. Expected was 3.97MWh actual 4.06MWh.
So this is what a typical day looks like :
Over 12 months, winter time costs but summer earns :
So over this period, the totals are :
- 4,060kWh of solar
- 7,048kWh imported, costing £563.43 + £220.17 standing charge = £783.60
- 4,638kWh exported, earning £694.87
- £26.69 of saving sessions and other “gimmics”
- Giving a total cost of £62.04 / year, or £5.17 / month – so not quite zero as the talk predicted
- Since house consumption was 6,469kWh over the year, with no solar/battery/smart tariffs that would have cost about £1,790.80/year
- Estimated savings of £1,728.76 / year, or a return on investment in 4.9 years
- Estimated CO2 savings 888kg/year (carbon negative in june/july/august)
This is for all household electricity use, which includes hot water and car charging. Excluded is car charging away from home. Currently, gas is used only during the winter months for heating.
Problems, risks & concerns
Over the last 12 months, there have been some issues :
- Some automations failed – some due to me, others due to loosing connectivity with the myenergi servers. Means I saved slightly less than I could have done.
- I’ve had some issues with the libbi battery – eg trip switches flipping and CT failing. Again, means I saved slightly less than I could have done whilst those issues were fixed.
- Octopus “saving sessions” went national with much less rewards than the previous year. Mostly this meant participating in had a risk of loosing money, so most were skipped
Also, there are some concerns about this approach :
- Tariffs can change … export and intelligent octopus go are now variable rates, which mean they could change at any time
- Although the libbi battery warranty is 10 years with unlimited cycles, there is some concern that additional charge/discharge cycles could wear out the battery quicker
- Changes in home assistant, home assistant plugins and octopus/myenergi API’s
- Myenergi products are only controllable via the myenergi servers (no local API available), so should connection be lost, automations will fail
Next steps
- Continue to monitor – seek out best tariffs and tweak automations
- Consider alternatives to gas central heating – as well as further reducing carbon footprint, this would eliminate gas standing charge
- air-to-water heat pump
- electric boiler
- air-to-air heat pump
- Consider more solar
- Adding some additional panels facing south west on our garage roof would be a benefit since it would catch the evening sun. Eg 2 panels would generate about 670kWh, or £100.50 (ROI about 8 years)
- Consider more battery capacity
- More battery capacity would reduce peak grid usage when the existing batter is depleted (mostly in the winter). However, the yearly cost of peak grid was only £90.78 so it doesn’t really seem worth it.
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It's sunny here again today. The main battery's full so I have plugged in the car to get some free fuel from the sun.
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Last month, March, we got our first negative electricity bill of the year via #octopusenergy intelligent + outgoing tariffs, #solar, #myenergi #libbi and automated by #homeassistant
I plan to write up a 12 month summary soon.
Now its April, peak rate has increased (but we use little of that), offpeak rate remains the same but standing charge reduced ... so April should be pretty good. However, outgoing is now variable, which could have a negative impact.
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#today trying to fix various systems that separately went strange: #myenergi #eddi spuriously giving fault 47 and eg not honouring Grid Limit; OpenTRV stats receiver going nearly deaf.
Latter largely resolved by moving it away from an unrelated mobile data gateway; former has a ticket in for what seems to be a longstanding bug.
Activity now: #hotBath
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Just adding a finishing touch to my solar battery/inverter setup. Should make people think twice before shutting it off.
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As my #heatpump installation is getting closer, #today I have added new #monitoring variables including for the heat pump #H4 boundary consumption...
https://www.earth.org.uk/energy-series-dataset.html#V-hph4
No data yet.
It turns out that my #myenergi #eddi is handling all this round of monitoring expansion. Heat metering etc may follow.
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I know I’ve already tooted about todays #FreeElectricity thanks to #OctopusEnergy but looking back as the day nearly is over, there is definitely a spike between 1-2pm where I def went for it! Image is screen grab from my #MyEnergi account screen today Sunday 18 August
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How to reduce your electricity bill to zero
https://plord.co.uk/uncategorised/how-to-reduce-your-electricity-bill-to-zero/
#Uncategorised #computing #homeassistant #myenergi #octopusenergy #u3a
The next U3ACommunities computing talk will be on 18th June and will cover using home automation + solar + battery + hot water + electric car + smart tariff to reduce your electricity bill. Sign up here https://u3acommunities.org/subscribe-to-computing-forum/.
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@marco
That's surprising. The Netherlands has a great record for electrification. We have Libbi, from #MyEnergi https://www.myenergi.com/nl/ but there are several other suppliers -
New Video!
https://youtu.be/itAWEdqnf7UGivEnergy vs myenergi: a comparison
#GivEnergy #myenergi #solarpv #solarpower #homebattery #zappi #libbi #eddi #harvi #AIO #All-in-one #allinone
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@davehorrigan
Hi Dave,
are there other Mastodon users interested in #myenergi products –namely #zappi + #harvi – I am using myenergi API
https://github.com/twonk/MyEnergi-App-Api.githttps://github.com/ashleypittman/mec
https://github.com/CJNE/pymyenergi
Energy_Report.py
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Well, got the Myenergi, Foxess, Sony TV and Router add-ons running. Maybe leave the Solaredge one for another day. Looking good, although it doesn't look as if I can program the battery charge time from the add-on. That'll be a shame as I wanted to automate it based on solar prediction for the next day. I
#MyEnergi
#Foxess
#homebattery
#homeassistant -
Just installed #homeassistant on a micro pc using the generic x86 download. Apart from a bit of an issue getting an EFI boot entry setup, using Mint live allowed me to sort this, all seems to be running ok. Now I need to get #Myenergi #Zappi, #Harvi, plus #Foxess #homebattery and #solaredge #inverter integrated. Be great to have everything on one display instead of 3 apps. #homeassistant seems to have found my TV and Router automatically so they are on the dashboard. Neat!
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