i`ve just had a 2.94kw solar pv fitted and the inverter is a sunnyboy 2500hf(2.5kw) which means i`ll never get more than 2.5kw output i understand efficiency of the system x.8 etc which brings it under 2.5kw if i had a 3kw inverter would i on a sunny day acheive more than 2.5kw if so why do you think the fitting company choose the smaller inverter