I can't answer your question because it takes a lot of data to answer it, which you likely have or can get, but isn't in your post.I know this is a tough question because everyone's power consumption is unique, but we have our boat spec'd with 3.2 kW of fixed glass panel solar in elevated composite frames with individual controllers for shading, and a battery bank of 600 Ah at 48V (28.8 kWh), so with that hardware how close to running fully off of solar do you feel we could achieve (on a scale from 1-10 with 10 being completely autonomous)
We rarely use A/C unless in a marina hooked to shore power, maybe to cool the master hull off on the occasional night when it's unbearable...or the nights my wife tells me to turn it on. The boat will not have a generator but will be equipped with dual Integrel chargers to further mitigate the use of diesel and help with autonomy.
Thanks for you input!
The best way to answer this question is very labor intensive. Using a spreadsheet app, make a list of every electricity consumer on your boat in one column, and it's demand in Watts in the next column. Then estimate how many hours/24 hour day you use each consumer in the next column. Write a formula in the next column that multiplies those last two columns and you get Watt Hours for each consumer for 24 hours. Then add that last column vertically, and that's your whole boat Wh consumption for 24 hours. Then apply a Capacity Factor to the Wh rating of your panels - based on your latitude and weather regime - to approximate their 24-hour output. In the tropics, the capacity factor might be 20% - lots of sun, short days, high temps....And of course shading counts.
So with your 3.2Kw of panels maybe you're generating something like 15KWh/24 hours....Compare that with your consumption spreadsheet, and you have the answer....
Sorry if I'm telling you stuff you know....
On our boat we have 840W of panels, and in the tropics that will run everything on the boat except the watermaker. We run engine/alternator/inverter to make water. We have a small token AirCon that only runs at the dock, it's pretty useless anyway.