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Hi Dave
Simon is pretty right about solar panel output. I have 3x20watt panels on my shed roof, and they feed through a charge controller to 4x40amp hour deep cycle batteries and then to a 500watt pure sine wave inverter. This provides emergency power to run my instant gas hot water, and also 12volts for my astro equipment.
The most I have seen in amp hour output is 3.5, but this should suffice for what you want.
Solar has the advantage of reliability-virtually nothing to go wrong with it,and is much cheaper than a GOOD generator and more portable.
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