In the control panel we have options for battery charge power (in watts and controllable from settings and the app) and inverter charge power (percentage, controllable from control panel only).
What does each one do?
As I’ve set my battery charge power in both app, portal and control panel to 3040w but notice it charges at 3.4kw. If I drop it to 2560w it charges at the expected 3000w.
But, if I set the inverter charge percentage to 50%. Then it will limit charge to 3000w as expected.
I only ever change battery charge power to vary my battery charge rate
Inverter charge power I leave set to 100%, I think it is used if you only want to reduce grid charge rate whereas battery charge rate is used for both solar and grid charging.
When you set a charge rate in watts then it gets converted into a number in the range 1-50 in the inverter, so that’s part of why there is a discrepancy between the rate you set and the rate you get. I think also there’s a difference in how and where things are measured, whether in DC or AC for example and whether it is pre- or post-voltage conversion
So… maths.
So if I set it to 3000w is it actually charging at 3000 but shows 3460 in the app. Or… is it actually charging at 3460 and something else math related is going on 
I have an AC3.0 inverter and I see similar in portal and app.
Yesterday evening and early this morning, I saw
Exporting up to ~3180 W
Importing up to ~2870.
I just accept it as ‘one of those things’ and don’t worry about it!
Rob
It is charging at 3460 but (I think) that power is measured on the AC side and so is pre-AC to DC conversion losses, typically around 5%, so you’ll get slightly less going into the battery
Why is it 3460 when you set it to 3000?
The original firmware on the AC3 could only manage 3kW, since then GivEnergy have improved the firmware and so you get a better charge rate as a result.
I have Gen 1 hybrids rated at 2600W but get 2750W charge rate. Discharging I get 2450 I think because whilst the battery is discharging at 2600W on the DC side, by the time it gets converted to AC I only get 2450W of AC.
And then to add to the confusion, with later firmware and BMS’s GivEnergy have introduced temperature limiting charge rate, your battery can still discharge at full rate, but once the battery cell drops below 20 degrees C (often the case in winter depending on where your battery is house), it’ll charge at a slower rate