Managed export/battery use

Lins1

I am using Wonder Watt with a GivEnergy battery and IOG. What I observe is that the battery is used for house and export in the evening (I have a schedule set for this), but what I would like to set up is that this would be for a longer period, so that rather exporting at full rate for half the evening, there was a reduced export so that the house could use the battery for longer. Can I set this up somehow? Or does anyone have advice on the best way to balance battery/export to reduce grid import

admin

Lins1 Could be done by reducing your discharge rate.

We could implement a % discharge rate for Giv as part of running an export, but if you discharge at say 1.5kW and you put the kettle on at 2kW, the additional 500W would come from the grid...

warped-carpet

Lins1
I top up my battery overnight, export from 0600 till 1200, solar tops up the battery during the afternoon (orientation favours that time) then I export again from 1900 till 2300. The battery will always favour home demand over export. I rarely draw from the grid during peak hours.

Lins1

admin Thanks I'll play with it and let you know

MrMessy

Unfortunately, there's no way of distinguishing between discharge to house or grid, so whatever power output you set in the inverter applies to both.
As pointed out, if you reduce the output, this could lead to unintended grid draw.

What you could do is leave the inverter on ECO, so it always covers the house load but, set more smaller forced discharge schedules with SoC queries. This would maximise your grid export without leaving you short to cover the house.

There's some examples here:
https://community.wonderwatt.com/d/315-intelligent-octopus-go-limited-beta/237

I keep meaning to write a cheat sheet for this, but get sidetracked. Must get back on that.😳

Lins1

MrMessy Thank you. I'll have a go. I did adjust the % discharge and this is helping so far, but I'm slightly cautious about putting the oven on (!) so will go through your suggestions

MrMessy

Lins1 this may help...
https://community.wonderwatt.com/d/934-wonderwatt-battery-discharge-cheat-sheet-unofficial

ChrisR

warped-carpet Is that not a less efficient method than simply topping the battery up to 100% overnight, and then letting the Solar export through the day? There must be losses involved in charging the battery from Solar, and then more losses in exporting from the battery?

Lins1

@admin hi my export was working in the evening but now nothing is happening in the evening. The grid is powering the house, even though the battery is full and no export happening in the evening. The only way I can export is by setting it up in GivEnergy. My schedules aren't working at all

admin

Lins1 Have you checked if your Eco-mode is on? What is your WattID - the name under the version number in the nav menu...

MrMessy

Lins1 export schedules not working suggests you've paused them here:
https://app.wonderwatt.com/pause

or, they're not "active" here:
https://app.wonderwatt.com/schedules

If your battery isn't powering the house at all, first check you have "Eco on export" set to on here:
https://app.wonderwatt.com/advanced

then, in the Giv web portal, go to My Inverter, ⚙️, and refresh each register. Eco is near the top. You may have inadvertently switched Eco off, or they can get stuck, particularly when playing around with the app.
I would refresh every register whilst you're there, and check they all make sense.

admin

Lins1 My schedules aren't working at all

None of your schedules? Is there anything in the WW activity logs?

Lins1

MrMessy

I have checked the pause

They are all showing as active (the morning one works)

I've checked Eco is on

On GivEnergy I have these settings

I ended up putting in a discharge time for the inverter to try and trigger it, but will this stop Wonder Watt working.

I really appreciate your help

MrMessy

Lins1 settings look fine.

Has your GivEnergy token expired?

Lins1

@admin are you able.to help? I can't create any new messages either at the moment on here

admin

Lins1 What is your WattID please?

Lins1

No. I renewed the GivEnergy token a few weeks ago. Wonder Watt just doesn't seem to trigger the battery use and export for me in the evening

admin

Lins1 Ah - right, your error message in your Activity log says:

Error getting site details: Forbidden

This is typically a GivEnergy token permissions issue, you need to create a new API token with the appropriate permission scopes as defined here: https://community.wonderwatt.com/d/19-api-token/2

That should do the trick.

Lins1

admin I've redone my API token with settings as on the list. Hopefully this will now work. Would you mind checking to see if this looks correct?

admin

Lins1 I think that's fine now, Site settings can be retrieved. And successful charge instruction was sent earlier this evening.

Glad it's sorted!

Lins1

admin thank you!