New owner of '05 with only 200 miles

Right now its been going between 7 and 8 bars on the graph, I can't really tell what the colors are, blue/green/black are colors I have problems telling apart if they're the same shade.

If I run the car out on the highway, say 65 mph, and stay at a constant speed, the bars are all filled in, with the occasional flash down to only 7 bars, if I decel from higher speed to exit, the 8th bar lights up and stays there till say I either accelerate hard or climb a long ramp. Its dropped as low as 6 bars with the A/C, headlights, and radio on when climbing a freeway ramp or just running uphill for a mile or two. It recovers in about the same time it took to drop to that level though. I've been trying not to park it unless all 8 bars are showing, and its always remained the same by the next morning.

Will driving it 100% of the time down in FL with the A/C on and the radio playing discharge the battery beyond its ability to keep up with the charge? I think this is the scenario I fear the most.
I don't want to have to constantly have to think about the battery charge and how much I've depleted it or how much its regained when I park the car. Around here it don't seem to be an issue but I've been deliberately trying to let the battery get more charge than discharge time since it sat so long. I don't think I'd have any issue with the drive to FL, my concern would be driving around town down there with the air on all the time.
I do think I may be better off with a conventional car, or if its a hybrid, one that I can just plug in to boost the charge overnight. Down in FL I think a solar option would be good.
So far around here I've been getting between 46 and 50 mpg. If the mileage stays in this range that means it would cost me under $50 to drive to FL rather than the $350 it cost me to drive my truck down there last winter.
I figure if it continues to get the same mileage its getting now, I'll make two gas stops on my way down I95 and arrive with about a half tank or so.

I was also told today that I will have the opportunity to buy another identical Prius, but this one with 1,500 miles. The person who inherited that car hates it and doesn't trust it. It spent the last week at a Toyota dealer getting a new battery, which Toyota apparently paid for all but the labor. If I don't buy it, it get offered to the rest of the family who won't likely buy it or have the cash to do so. It would then get sold off to a private buyer at book value or what ever value the three co executors of the estate decide on. I could soon have twin black Prius' in the driveway. Having one with a new battery in it would really let me compare the two and how the batteries behave when driven.

 

I filled the tank again today, this time it took 9 gallons even and I went 496 miles. I think this actually does better on gas around town than it does on the highway on long trips. Most of my driving on this tank was in the 35 to 50 mph range with only one or two short trips on faster roads. I drove it nearly all day today with the battery meter pretty much doing the same thing, moving between the 7 and 8 bar. I did see it drop down a few bars after having to step on it pretty hard on one on ramp to get up to speed on the freeway for a bit but it recovered back to 8 bars by the time I got home.

I'm considering buying the second Prius just to have the spare HV battery, I can own that car for less than the battery is worth. Apparently Toyota put a brand new battery in it under some sort of customer satisfaction policy. After my aunt went through all that she decided she hates the car and wants it gone. Its an identical twin to mine but with just over 1500 miles now. (Mine is soon catching up to that mark, I'm just shy of a 1000 miles right now.

If I were to buy and keep the second car in storage, what is the best way to preserve the batteries? From what I gather its to completely discharge the HV battery? How would I do that? Or should I just keep the car with the new battery and sell the other one?
I bought two trucks and a Crown Victoria today so I'm getting low on storage space here. I'm also going to pickup another truck from the estate this weekend. The neighbors are starting to say my yard looks like a used car lot.

 

Their both black, every vehicle in this lot is black. Even the trucks.

 

I'm leaving in the AM to go get the second Prius. I borrowed a buddies 53 foot fifth wheel triple car hauler and one ton dual wheel pickup to go get it and at least one other truck. I'm not sure if I'll try to load a third vehicle on the trailer since one will be a full size extra cab truck. Its a long ride back and as much as I'd like to minimize the trips I don't want to push my luck with a borrowed truck and equipment. I'm also not sure if the third truck is up and running or not, it may not have a good battery in it or may not have been 'waken up' yet. Loading a dead vehicle on a ramp trailer would be a bit tough and I don't really like putting a nice car in the lead position for a long haul like this. The chances of paint damage or a stone chip is too great for the vehicle sitting up above the tow vehicle. (Its one of the long ramp type haulers like you see them hauling limos and conversion vans on). It will fit three but there's no winch. I've hauled three on it before but never loaded a dead one by myself. It takes a lot of jockeying with a snatch block and cables to get the truck's winch to pull a non-runner up the ramp.

 

I figured I'd give an update here.
I took the trip to get the other vehicles last Saturday, it rained the whole way up and the ride took four hours instead of 2.5 due to traffic tie ups and general slow going on the back roads with the truck and trailer.
When I got there only two of the vehicles were ready, one was still at a dealer, and the other hadn't been cleared for removal yet due to some glitch on the new title.
I loaded the second Prius, it started right up and has no issues. Its got 15,000 miles on it not 1,500, but for the price its pretty much a non issue. The second vehicle was a 3/4 ton truck that wouldn't stay running but I managed to load it anyway.

The only issue with the second car, also a 2005, only vin 4 digits off from the first one, is that I can't seem to get it into the screen where it shows the arrows and battery charge/discharge?
Its screen is the same but the display is a different color.

The bad part is that I'll have to make another trip to get the last two cars I bought from the estate when the titles come back. (the executor of the will has to have one title corrected as it had the wrong color and no mileage statement on the title, and the other one hadn't been signed when I got there. Either way, I now have two 2005 Prius' here.

I was thinking of taking the new battery from the car with 15K on it and putting it in the one with now 1600 miles, but there's really no difference in the two cars, both are minty clean, both have new tires, both are identical in every way, even color.

I've got a buddy who wants to buy one of them, I just have to decide which one I want to sell, although the thought of keeping one as a spare or for parts has crossed my mind.