Given the relatively temporary nature of the use case, in your shoes I’d opt for a rechargeable power bank of some description instead of relying on a small solar set up.
I’ve used a dash camera connected to a power bank for a similar purpose. I’m sure an rpi would sip power in comparison.
“Ireland does not give preferential tax treatment to any companies or taxpayers,” stated a spokesperson from the Irish Ministry of Finances.
I wish the media would eviscerate these people like they used to.