u/Ratty4547

I’ve been testing PW3 export behaviour and it appears the decision logic ignores solar generation, instead focusing on whether future import prices are lower than the current export price.

Test setup:

Solar generation continuously >4kW throughout the test
Export price set to £0 for Peak (P) and Super Off Peak (SOP)

Tariffs:
Export: £1/kWh from 11:30–13:00 (MP)
Import: £5/kWh during export window (MP)
Import: £10/kWh from 13:00–18:00 (P)
Import: £0/kWh from 18:00–20:30 (SOP)
Import: £10/kWh from 20:30–24:00 (P)

Observed behaviour:
At 11:45, PW3 decided to export from the battery.

Then I changed only one thing:
Changed 18:00–20:30 import price from £0 (SOP) to £10 (P)

Result:
PW3 almost immediately stopped exporting from the battery and switched to charging instead.

What’s interesting is that solar generation remained >4kW the entire time, so the export decision seems driven by future import pricing ignoring anticipated free solar availability (13:00 onwards).

Additional context:
System has been running Self-Powered for the last 3 days
No grid imports during that period
Battery (PW3+1) was at 100% at the start.
Overnight usage supplied from solar-charged battery

Until today my solar was not using the PW3 inverter. I now have two new strings attached directly to the PW3 inverters.

It appears that even though the battery is charged to 100%, with solar exporting excess solar, I cannot set a price plan that causes the battery to export at the same time (peak export price is at 4pm).

Is that normal, i.e. PW3 can’t export from battery and directly attached solar at the same time?