Both will require 14.8 daily charges but I understand the 16's have special charging considerations due to the height of the battery.
300-600 solar may not be enough depending on all your other energy use. I would do an energy audit guesstimate. Number one is the question of if you ever want to run your ac. My answer was yes so I started with a 3000 watt Honda remote start generator. From there it seemed like the magnum inverter would have cost me $2,000 so I walk over and push the remote button for toaster, hair dryer, microwave. If you need silence than obviously you need to invert but it does get pricey to replace propane and avery small amount of gasoline.
I have 4 cheap 6 volts and only invert to a 40 inch tv and misc laptop etc. Along with house furnace and everything else a minimum day uses 60 to 80 ah. A heavier day uses 120 or more.
If you start out with 420 ah and can only use 210 at best and more likely say 190ish, in the end, with rain or clouds you could need a generator. I dont know your whole energy plan so just throwing some stuff out there.
I'm running 520 watts with Bogart engineering solar. I know I couldn't invert much with these batteries. I like my digitally controlled house furnace and we cant tolerate a catalytic for our sinus headaches so furnace is 6 amps alone. The ultimate answer there is a CAT platinum vented. Next pack will be probably be 105's.
Build carefully as there are many people out there that are way out of whack. 3 group batteries and a 2500 watt inverter!!!! or a 2500 watt inverter and 4 old gc2's but a 13.5 volt converter and 200 watts solar trying to bake cakes!!!!
