I'm looking for alternatives to the increasingly flaky Predheat and am after a definitive answer regarding WW.
Does WW work with IOG and a Ohme Home Pro? If IOG schedules a charging session outside of the normal off-peak will WW see it and stop the battery discharging into the car?
My set up:
Gen 1 HY5 inverter
2 x 8.2 batteries
Ohme Home Pro
No car integration possible (Genesis GV60)
Thanks in advance.
Zakalwe Thanks for your interest.
If you do not see your IOG mapped charges in the Octopus app, but instead see them in the Ohme app only, it means we do not have visibility on them as Octopus does not have these mapped charges exposed via their API.
Ohme must have their own mechanism of determining green slots and settle this with Octopus after the fact somehow.
Ok, thanks for the reply.
So if IOG issues a charging window outside the off-peak period via the Ohme integration, WW cannot see it and as such the GiEnergy battery will discharge into the car?
A separate Home Assistant automation will probably be needed then to prevent the battery discharge. I wonder if anyone has one to hand?
I am in the same boat.
AFAIK Ohme Pro + IOG + Solar + Battery + WW doesn't work that well because Ohme do the scheduling themselves with their app rather than use the Octopus setup.
This means WW can't find out about on the fly charge slots so can't stop the battery discharging into the EV when they happen. Might be worth asking on the WW forum in case things have changed.
Also, Ohme FAQ says that their app/setup can't stop solar battery discharging into the EV with IOG.
One option I am considering is use WW to handle the defined IOG charge slots and with Ohme,, set the 'confirm all charges' to yes on the app so when I plugin, I can stop Ohme charging until I approve the plugin which i can do in the evening so Ohme only uses the overnight slots.
Arranging the wiring of the chargepoint so that it happens before the CT clamp for givenergy is the simplest way to prevent GE attempting to cover that part of the load. Another option might be a separate CT clamp around feed to the chargepoint so you can detect it. Then presumably feed that into home assistant or similar.
I'm currently learning about using esphome without home assistant, to feed sensors into my own scripts, and I think that supports ct clamps. Or I think Shelly do one. (A charity shop near me had one of those OWL monitors with USB support. I was quite tempted, but didn't in the end - I already have a non-USB one as a display for HP, and I record usage through one of my Zappi's CT clamps. (Got fitted for solar, but that's not much use to me.)
I thought I'd read somewhere that Ohme was going to get incorporated into Octopus' app. Maybe that got abandoned, or just hasn't happened yet.
I guess Eon Next Drive is always a simpler option...
DD Shelly do a couple of energy monitors that support CT clamps. I have three of the EM’s monitoring various circuits in my house including a non-integrated FIT solar array.
There’s also a DIN rail mounted EMpro which I believe is more accurate.
DD Arranging the wiring of the chargepoint so that it happens before the CT clamp for givenergy is the simplest way to prevent GE attempting to cover that part of the load. Another option might be a separate CT clamp around feed to the chargepoint so you can detect it. Then presumably feed that into home assistant or similar.
That's a non-trivial piece of work if the charger is wired into the main consumer unit, as mine is.
If your portal shows actual meter data from the meter tab (which I know in Givenergy terms is ambiguous as there's several things named like that, but it's the big table that shows ID1, ID2 and so on) then I beleive you can just hook up another GEM120 meter as ID2 and then poll that directly via the inverters dongle?
There is an unofficial Ohme integration for Home Assistant that works very well and can be used to automate pausing or charging the battery when the car is charging. The Octopus integration doesn't pick up the cheap slots so isn't any use.
I created my own automations using Node Red. Speak To The Geek has created an automation blue print for controlling Givenergy batteries. It used the Octopus integration, but I expect it would be easy to adapt it to use the Ohme integration instead.
This is a link to the Speak to the Geek article
https://www.speaktothegeek.co.uk/2025/02/charge-givenergy-batteries-during-intelligent-octopus-go-cheap-slots/
Despite what the article says, I think you could use his blueprint with an Ohme charger, but you would need to create a binary sensor to indicate when the Ohme is charging (there isn't a suitable sensor in the Ohme integration itself).