The Battery system I am placing on my boat is the power that makes everything possible.

On board I will have a 48 Volt system and a 12 Volt system.  The 48V system will power my boat with a ThunderStruck Electric Conversion system as it is far more simple to repair if something goes wrong, far less likely for anything to go wrong due to less moving parts, and of course very clean and renewable.  I do have a gasoline generator so I will never be completely stuck without power, but to use it as little as possible is the name of the game.

This part starts with 48 Volt Batteries.  I aim to have the ability to access roughly 6 hours of drive time on this system.  This is around 10 times the power I will need under most circumstances, since it is rare that I will need to operate under power.  Space is another issue that needs to be considered carefully.  With my Yanmar 30 |Diesel engine out of the way, I will have considerably more living space but I will still need to be space conscious.  This means that I will need to buy 48 volt batteries and not running 12v or 24v batteries in series as the volume of batteries would take a lot of space to make the same power requirements.

The 12 Volt system I will be running will be separate entirely from the driveline and in the event of an emergency I will be able to convert the set up to 48V for extra life saving power.  This system will run all of my general purpose needs, and the plan I have should keep me in power on board for roughly 5 days even if there is no sunlight.

Starting with the 12 Volt Batteries I will have 4 (so they can be made into a series to make 48Volt in an emergency) 460AH 12 Volt.  This means I will have roughly 380 usable Amp Hours of battery without risking battery health.  These will be charged in a variety of ways.

I have a Solar Array plan that allows me room to place 5 fixed solar panels, and potentially 2 additional flexible panels.  The fixed panels I have selected are 400 Watts each making a considerable 2000 Watts of power generation during good sunlight.  This will be added to A Wind Generator for the 12 Volt System and will serve in place of the solar array for times where solar is not an option. Since my sailboat's primary source of fuel is wind and I have the power of that wind to propel me forward, it makes sense that a water turbine would be useful as well.  A Hydroelectric turbine is dropped into the water under sail power and generates power as I go across the water. Finally there is fossil Fuel Generation.  Having an engine going in the background is part of the life I am jumping into, and power generation of this type is of course necessary when off grid living such as what I am doing periodically.  Having a Gas Powered Generator is just a smart backup plan.  My considerations in this are Noise level, Power generation and size.