A lot of good points have been made.
I assume that you will not be plugging into a dock
every night. You use 150Ah per day that is 1800 watts @ 12V nominal. watts = volts x amps
Like a64pilot says - battery bank size does not change charge time. 1800 watts is the same whether it is out of a 300Ah bank or a 1000Ah bank. What battery banks size does affect is how long your batteries will last. Simply, if you have 100 cycle life, you can discharge your batteries 200 times before they are worn out. In real life, if you only discharge lead acids 20% they will last a lot longer than if you discharge them 50%. At 80% discharge, you will not see 100 cycles. Lithiums can handle a 80% discharge without damage to the battery. Battery chemistry does change charge time because lithium charge significantly faster than lead acid. Lithiums have 99% charge efficiency at 14.5v (more watts) whereas lead acid have 85% efficiency with a voltage and amp drop during absorption stage less watts).
Your solar panels
will produce 350 watts per hour and if you get 8 hours of perfect sun = 2800 watts. However, I have never seen perfect conditions under sail. You do not have the best angle to the sun, sometimes the panels
get shaded by masts or sail, sometimes there is not much sun.
Depending on the sun every day to charge your batteries is like depending on catching fish
to eat. In either case, there is a chance of going hungry.
So figure you probably need at least 2 days worth of energy = 300 usable AH @ 12v or 3600 watts.
The size and weight of your battery bank depends on whether you go lithium or lead acid.
Lithium are 12.8v nominal and when you reach 50% you will still have 12.8v. Lithium can be safely discharged to 100% but 80% is where you start to see the voltage drop.
Lithiums have a 99% charge efficiency so every solar charge amp that goes into the battery. Lithiums are light weight. Lithiums are maintenance
Lithiums will last 2000-6000 cycles.
You need a minimum of 200 Ah to meet your 150Ah needs.
200Ah 2560 watt hour = $1450 - $2000 60lbs
300Ah 3840 watt hour = $2200 - $3000 = 70lbs
400Ah 5120 watt hour = 2800 = 100 lbs
Lead acid are a nominal 12V and when you reach 50% discharge, they will have 12.2V. Lead acid batteries should never be discharged more than 50% or it will severely affect cycle life. The lower the voltage the more amps you need to get the 1800 watts of energy. With lead acid you have choices of flooded, AGM
or Gel. Flooded and AGM
are the most common lead acid batteries that are in boats. Do not buy the cheap
batteries - go with Rolls, Trojan, Lifeline or some other quality battery. The difference is in the construction and materials and it is worth every dollar.
Lead acid batteries need to be maintained if you want them to last. They need to be fully charged regularly, perferably daily to prevent sulfation and electrolyte stratification. Keep the terminals clean and remove any corrosion
regularly. Flooded batteries need to have water
added on a regular basis. Lead acid batteries are heavy and every pound lowers your waterline, slows your boat
and takes more fuel
to push it. Lead acid charges at a max 85% efficiency and that goes down as the batteries get old, sulfate and lose capacity. Also AGM have about 20% less capacity than flooded.
Lead acid batteries will last 400-1000 cycles.
You need a minimum of 300Ah to meet your 150Ah needs
(4) Trojan T-105 Flooded 6v = 225 usable Ah (2700Wh) = 4 x $440 = $1095 = 248lbs
or (6) Trojan T-105 Flooded 6v = 338 usable Ah (4050Wh) = 372lbs
(4) Trojan T-105 AGM 6v = 217 usable Ah (2604Wh) = $1550 = 248lbs
or (6) Trojan T-105 AGM 6v = 325 usable Ah (3900Wh) = $2325 = 372lbs
You can also consider using a
(2) 4D 12V = 210 usable Ah (2520WH) = $1230 = 248lbs
(3) 4D 12V = 315 usable Ah (3780WH) = $1845 = $372lbs
You have lots of choices - good luck