Solar / Battery Storage considerations

Yes, the card will work for Agile Outgoing too, I’ve just tested it, see below, albeit we’re on fixed but it’s getting each period successfully

When you setup teh card you have to include the entity. Just change to the export entity, i.e.


Change the XXXX’s to your own Octopus values.

1 Like

No reason why anyone should be interested but the scaffolding is now all up. Install next week!


Thanks. I’ve been too busy with gardening to play with HA. Where is the Octopus tariff integration?

Flux is the best tariff for me export wise. I won’t be importing until October and then at the cheap rate.


The Octopus integration is available from within HACS ( Home Assistant Community Store). If you don’t have HACS you’ll need to get that first and then you can get the integration add-in…

The rate card is also in HACS and is called octopus-energy-rates-card.

1 Like

What spec is it?


Total 8.2kW, with 4.6 to the rear and 3.6 to the front. Rear is east north east facing with much larger roof area available and front is west south west

I think the batteries are around 14kWh. The inverter is going to be a single 8.2kW unit. I think we are having an Eddi to use surplus generation for hot water

Here is a view of the rear

The house is not detached and the split is not symmetrical - at the rear we have more width at ground floor / rear (35 feet) and much less in the loft / front (20 feet)

1 Like

Some statistics for May verified by Smartmeter
and the Net meter for the inverter. The panel production is from SolarEdge.

Panels 842.27 kWhp
Grid Import 188.77 kWh (168.2 to Batteries, 20.57 to house while batteries charging)
Grid Export 484.52 kWh
Inverter Out 912.25 kWh
Inverter In 168.2

Self Consumption = 912.26 - 484.52 + 20.57 = 448.31kWh of which
EV charger 62.2kWh
ASHP 92.9 kWh

Inverter Efficiency = 912.25 / (842.27 + 168.2) = 90.28%

I don’t entirely trust the figures from the SolarEdge App.

@TimOopNorth I would advise having an Import/Export (Net) meter as you are having battery as the extra cost now is minimal. Better still one with a digital interface for reading either via Modbus or Mbus.


All a bit frustrating - installer hasn’t commissioned the panels etc which were all installed yesterday. Pleased they managed to fit 10 on the front (and 10 rear) as front is a bit more south facing. They held off as they persuaded themselves that we are imminently getting the supply split but there is no date set for that and brother in law is dragging his feet a bit to avoid having to pay a full standing charge (rather than one third).

I am not sure what say we will have in smart meter being installed - will worry about that nearer the time

Anyway, being commissioned a week tomorrow

It takes time to issue the MCS certificate and get the DNO approval letter. I’d certainly recommend Octopus Flux tariff. Octopus are fussy about meters so you might need another if it is fitted by another supplier.

As my figures show we hardly use much at this time of year. I have been waiting for some sun the last two days to charge the car which needs 54kWh. Meanwhile we export 11kWh/ day at 36p/kWh.


I will certainly be signing up with octopus when we get the supply split. My only problem might be the export of wind turbine surplus as we have deemed 50% export on that. Might be worth losing for a better price but then that overlaps with the neighbours’ share of fit including export so unsure what the practicalities will be. The others won’t want overnight tariff differences I don’t think