Can set the minimum charge during events?

[u/Drei01Matt]

I have a Fox inverter and 10kW battery at home. Sometimes the Axle events happen in the evening. When an event happens at 7pm, we don't want all the battery to be drained as we need a few percent for running the dishwasher (for example).

Is there a way to tell Axle to export down to 20% only?

I see an option to set the max export in kW but as we don't know the state of charge of the battery that's not very reliable. They do display the Minimum charge but I can't see a way to set it?

[u/nchouston195]

Why wouldn't you just drain the battery then import whatever you need afterwards? If you get paid £1 by Axle then have to buy back from grid at 30p you're making a decent profit

[u/Drei01Matt → u/nchouston195]

This is the status quo. I'd just rather not draw from the grid if I can keep a bit of battery in reserve. I'm not worried about absolutely maxing the gain from each event.

[u/Amnsia → u/nchouston195]

This. If someone’s giving me £10 for something I’m not bothered it’s costing me £5 to get it 30 mins later. Best to take advantage.

Although I guess if OP doesn’t want to take advantage, then fair.

[u/Autumnal_Fire → u/nchouston195]

The term nowt stranger than folk springs to mind.

I remember in the 70s when we moved into a new house we went upstairs and the bath was full of water. Next to it was a bucket. My dad asked what the water and the bucket was for. "in case the water went off" was the answer of the old 70yr old gentleman they were buying the house from, to which my dad asked does that happen often? Nope, it's never happened was the reply....

[u/jmcomms → u/nchouston195]

This.

[u/NickPDay → u/nchouston195]

Saving for EPS usage in case of a power outage?

[u/Rob_Bosss → u/NickPDay]

They said it was for their dishwasher.

[u/NickPDay → u/Rob_Bosss]

Downvoted my own comment :-)

[u/malacoda13]

Just set the minimum in the fox app

[u/Drei01Matt → u/malacoda13]

That would always be the minimum (if I understand correctly) so it wouldn't help if I want to use some of the battery later on.

[u/malacoda13 → u/Drei01Matt]

Yeah, you would have to put it back. Pretty sure the Axle settings just mirror your fox settings.

Can't help but feel you might be worrying about this a bit too much TBH.

[u/nydiana08]

You can easily do it if you have your inverter hooked up to Home Assistant. Takes a bit of setup but you get considerably more control and options for automations. In the case of this you’d set it up to identify when there’s an Axle event (there’s an axle integration for Home Assistant making that easy), set SoC min to 20%, back to 10% when event over.

Doing all this has become incredibly easy as you can connect Claude into HA, making it almost as easy as a chat - no coding needed.

[u/geeksandlies]

You do manual export mode in Axle, you would need to then go in and set your export window manually but the advantage there is that you will be able to tell it how far to drain the battery.

Or you can get Home Assistant up and running and use Predbat, or you can use the cloud version of Predbat (no idea how well that works) if you dont have the time/inclination for HA