newbie needs help

I am and avid follower of you posts.. my wife and i and move off the grid -- we will be self sustained -- my plan is to dyi my solar == by all the calculators available on line conservative estimate for our needs will be 4000 watts per day with 6.5 hrs of sun avg.. -- i do have full sun no shade in the location of my panels -- the system i think and stress i think will fit my needs is the MPP 24v 2.4kW PIP Model $600-$639 listed on your website using the 24v lifo4powerwall my questions are these:
1 is this configuration sufficient
2 how many panels should i use ==24v 100w or higher -- prefer to parallel the panels

There are some rules of thumb to throw at you. First, in summer, multiply your watts of panels by 5 to get watthours perday, and by 3 in the winter. Second, don't expect to get more than 85% of what your panels are rated for. Let's say you have four 250W panels, That's 4 x 250W x 3sun hours x .85 in winter to get 2550WH in winter, or 2.55kwh. Then, 4 x 250W x 5sun hours x .85in summer to get 4250WH in summer, or 4.25kwh. Let's say you need 5kwh of power in the winter. 5kwh is a conservative value for a 20th century lifestyle that includes a refrigerator, lights, and TV. To get that in winter, you'll need (5000WH/3)/.85 fudge factor = 1960W of panels. Call that 8 250W panels. 2000W just happens to be the max your unit is designed for.

Why would you want to run panels in parallel? Higher voltage means lower losses because of wiring resistance. That unit can handle a total Voc of 145V. Assuming that a 250W panel will run at about 40Voc in winter at the freezing point, you are better with a 2S4P configuration rather than 1S8P configuration. If you wanted to toss in one more panel, you could wire them in a 3S3P configuration without seriously over amping your system. With three in series, the Voc in winter is going to be somewhere in the range of 120V. What are your winter lows like?

BTW, I'd look at getting a somewhat larger unit, maybe the 3000W. Your electronics will be happier if not ran at their red-line ratings. For my own 24V system, I used these batteries, which I am very, very pleased with.