boat is big but not big enough to support that, its a monohull not a cat.Two 48V batteries connected in series. Two 48V MPPT, each with an array of PV panels. One or two inverters running off 48V.
Just need equipment that is isolated, doesn't care of negative or positive of battery is grounded. Which is probably many. my SMA allow that.
Amps? That's just how many strings of batteries in parallel.
You could say that about any sailboat with a diesel motor. (i.e., the vast majority of them) But you can shut of the motor and continue on wind power. That makes it a sailboat.This really looks like diesel powered ”sail”boat with electric drivetrain
boat is big but not big enough to support that, its a monohull not a cat.
Right. Your concept looks good to me now that I have increased my own level of understanding (still a long way to go though...) You're going to have lots of capability, lots of range, and it's a conservative system but not archaic, far from it. You'll likely end up being able to cruise up nonchalantly to some stranded pure electric boat and offer them a tow.I was thinking https://www.solaris-shop.com/ja-solar-jam72s10-410-mr-410w-mono-solar-panel/ or https://www.solaris-shop.com/trinasolar-tsm-410-de15h-ii-410w-mono-solar-panel/ or https://www.solaris-shop.com/axitec-axipremium-x-hc-ac-400mh-144s-400w-mono-solar-panel/ or https://www.solaris-shop.com/hanwha-q-cells-q-peak-duo-l-g6-2-425-425w-mono-solar-panel/ but i would still need to feed an invertor/charger, those are 48v.
Data Input | |
Waterline length in feet: | 36 feet |
Beam at the waterline in feet: | 13 feet |
Hull draft in feet (excluding keel): | 6.3 feet |
Vessel weight in pounds: | 28000 lbs |
Engine Horsepower: | 35 HP |
Number of engines: | 1 |
Total Engine Horsepower: | 35 HP |
Engine R.P.M. (max): | 1600 RPM |
Gear Ratio: | 1.7:1 |
Shaft R.P.M. (max): | 941 RPM |
Number of shaft bearings (per shaft): | 1 |
Desired speed in Knots: | 8 knots |
Horsepower Calculations | |
This will calculate the maximum horsepower and torque available at the prop(s). | |
Total available horsepower at the engine(s): | 35 HP |
Total available torque ft/lbs at the engine(s): | 115 ft/lbs |
Horsepower loss of 3% per gearbox: | - 1.1 HP |
Horsepower loss of 1.5% per shaft bearing: | - 0.5 HP |
Total horsepower available at the propeller(s): | 33.4 HP |
Total torque ft/lbs available at the propeller(s): | 187 ft/lbs |
Speed & Power Calculations | |
Basic displacement speed and horsepower required | |
Displacement hull speed (1.34 X sqrt of waterline length): | 8.04 Knots |
Minimum horsepower required at propeller(s) for Hull speed: | 61.1 HP |
Calculations based on desired speed and available HP | |
HP required at propeller(s) for desired 8 knots speed: | 55 HP |
Estimated maximum speed with existing 35 horsepower: This is the speed we will use for the propeller size. | 6.76 Knots |
At this point it is important to note that all of the calculations above are based on full RPM and HP. Most engines are rated to run at a percentage of thier full RPM. This is what will determine your maximum cruising speed. The propeller sizing calculations below are based on 90% of full RPM. This gives the engine some reserve power to allow for variable loading in the vessel. |
Propeller Size | |||
Number of blades | Diameter (inches) | Pitch (inches) | |
2 Blade | 22.2 | X | 14.0 |
3 Blade | 21.1 | X | 13.9 |
4 Blade | 19.8 | X | 13.6 |
Nice price on the generators, ae they going to hold up though in a marine environment?http://www.centralmainediesel.com/diesel-generators.asp these are the generators i am considering, the 5700watt one to be accurate.
With a victron inverter you can go in and swap some wires around and accept 240v from shore.