Hello @sschrestensen, a good person to speak to about the electrical grid on the island (and possibly solar panels) is @CaribbeanCowboy. If you have specific question, we can help get your specific responses - after all, that is what the forum is all about.
Regarding shipping from the US, this is usually done via ocean freight from Miami, or Houston. The cost can vary, but it can range from $5K to $10K for a full relocation. The price variants are directly related with how much you are moving. You must be sure to let the immigration offices know (before you tender) that the items are personal items. This will save you on taxes.
The absolute first step is this forum. Then, getting in direct contact with an agent. A good real estate agent is well versed on the steps you should take as you look to relocate. Speak to @Anna via email or in person when you are here next.
You can also read relevant information our private bureau’s website. Here is a good guide to get you started: