That means they reckon it’ll handle the startup current for a typical inductive load up to 10A, so you should be fine.
If your pressure pump has electronic control, it probably doesn’t start the pump immediately once it receives power, so your pump startup draw won’t be immediately when the Astute contacts close, which should help it cope a bit better too – it’ll only see the pump startup after the relay has closed and settled.
I’m actually running a pool heatpump (not inverter based) on one. Stable current draw is 11.7A, but:
- the water pump part is 800W which starts up immediately (contact close → inductive startup)
- the heatpump takes about a minute to get its bearings before starting.
So far it’s working fine… but after this check I’ll probably replace it with a motorized breaker I have lying around. Never only buy one.