I'd like to hear from community members their experience of solar power supplies. Given the below power requirement, how would one determine the optimum solar configuration that would "reasonably" guarantee power 24/7 all year round?
Of course, it will be location dependent to allow for latitude and inclement weather days. Let's say in this case it's Sydney, Australia. I'd be very interested to hear both calculated and rule-of-thumb answers.
Nominal Voltage: 12-volt
Load: 3-amps constant
Battery Amp-Hours: ?
Solar Watts: ?