Australia vs UK
@Pompous Git: I see that the base interest rate in Australia is currently 1.5%; in the UK it's 0.25%, making PV a correspondingly better investment compared with sticking your savings in a bank. And of course the tariff models are separate. But I didn't get PV just for financial reasons.
You also dis the technology on the grounds that it can raise your neighbours' voltage and blow their appliances. Yes, that might happen if there are two of you on the end of a long piece of damp string, but in my suburban setting it has no noticeable effect at all on the voltage, which I monitor at the most sensitive point - the inverter, as I have a low impedance supply. So you can't generalise, especially considering that the maximum power it has ever generated is about 3.5kW, which is scarcely more than a kettle. Putting on a kettle will reduce the voltage the same amount as full sun (with clouds around it, i.e. momentarily) will increase it. In addition, IIRC the distribution company has the right to refuse permission for you to connect if it thinks there is enough installed capacity in the area to cause an issue, but I would be interested to know how often this has happened, if ever.
You may not be aware that in the EU a simple fudge was made to harmonise the UK/IRL 240V with 220V elsewhere by mandating that all appliances must operate at 230V+6%-10%; this would not have happened if things would be upset too easily.
PS "MIssus"? How presumptuous!