Hi, Just had a 2 AIO parallel system installed and I want to set up timed discharge, but when I turned it on it used the full 12kw of inverter capacity to export. I’m based in the republic of Ireland and not an expert on the regulations by any means but I don’t think I’m supposed to export at that rate. I know I can set the maximum discharge rate in the gateway to a lower amount but I’m assuming that if I do that when the house draw is more than the lower rate it will pull from the grid which I don’t want.
Is it possible for me to set the discharge rate specifically for grid export without impacting the maximum house draw capacity?
I’m not sure how things work in Ireland, but in the UK, the DNO tells us what we are allowed to export (as a result of the application to them to install the kit) and the installer sets an export limit on the system.
You can specify “discharge power” in the mobile app (will also be a comparable setting on the cloud page, but I’m less familiar with that).
In the app “inverter Settings” → “battery options” → “discharge power” and set value you’d like.
I have mine set to limit charge rate so it takes the full 6hrs to re-charge overnight to try and keep the inverter cooler and some chemical sympathy for the battery.
But I leave my discharge rate at full because I want to be able to cover all peak domestic load and restricting the discharge rate would prevent that.
There’s not a way to specify an export profile at one rate for a defined period and then have full export rate the rest of the time for house load using either the app or cloud page, think you’d need a third party app or likes of Predbat and HomeAssistant.
Also, not all DNOs automatically apply an effective import or export restriction - I’m “limited” to max 30kW export, but I’d need a three phase supply to achieve that in reality as I’d pop my single phase 100A DNO fuse, which is well above what I’ll achieve with theoretical max export between PV & BESS, even if I added a second AIO when the AIO2 launches.
If you want FULL control of the System and discharge rates etc… then I would recommend you look at “Home Assistant” and the GivTCP Add-on.
You can then setup an Automation to not only set your export time but also to change your discharge rate, if you can write down the logic of what and when you want to do it you should be able to program it.
I have setup things like looking at the Solar Forecast and turning off my hot water so the iBOOST runs etc…
I would also look into PredBat on the Home Assistant - as I think this can also control the export power etc…
( Once you start on Home Assistant you figure out how much it can do )