Alpha say: "When the store is fully charged an equivalent domestic hot water output of 50kW gives a flow rate of 18 litres per minute at 60°C, enough to fill an average bath in about 3.5 minutes.
If the store did run out 11 litres/min will still top the bath up. So, an average bath can be filled quicko. Showers will be high pressure.
That's if you have seen large flowrate combi. This man is wanting info to make a decision on a water system for his home. For his situation and needs the Alpha and Greenstar 40kW are ideal.
You acting the goat doesn't help at all.