Hi. I have the following setup at home:
[UK mains power]
|
|
|------->{guitar amp, 10 Watts RMS}
|
|
|------->(adaptor giving 9V, 200mA)------->{three 9V pedals, total 150mA}
I'd like to find a way to power this from a battery. I know I will need an inverter, and should expect maybe 90% efficiency from that. Basically I think what I want to know is how many amps my equipment will need, so that I can see what amp-hour rating I need a battery to be, right?
And apparently I shouldn't discharge the battery below 50% or so, in which case we can double everything at the end.
I hope this makes sense. So for example if it turned out that the gear needed 5 amps in total, then a 50 amp/hour battery would do for at least 3-5 hours, right?
Thanks for any guidance here!