Before I get to the question, let me describe my scenario...
I rent a house that has a smaller garage that can't fit my boat. Due to that, my boat has to stay at a storage unit that does not have any power in the stall. Currently, the only way that I can charge batteries before/after a fishing trip is to park the boat in the street in front of my house, run an extension cord from my house and across the street to the boat. However, the company that runs our housing has complained that I can no longer do this. I also can't park the boat in the driveway because the driveway is too short. I have considered spending the money on a something like a Stealth charger that will charge the batteries while I'm towing the boat but most of the time, the lake will only be 10-20 minutes away. I can't imagine that the batteries would get enough of a charge in that short of a time. Maybe I'm wrong?
With all of that being said, here's the question. I have 4 batteries in the boat (36 volt system plus the cranking battery) and I am wondering is one of these portable charging kits (linked below) would do the trick. If I bought one, I could just take it over to the storage unit the day before a trip to charge the batteries and then not have to worry about charging at home anymore. It could also be used on any trip where I may not have easy access to electricity.
Has anyone used one of these? Is there a specific model you recommend? Based on everything I've read about them, I don't see why this wouldn't work.
https://www.sears.com/diehard-gold-p...1&blockType=G1
UPDATE TO ANSWER QUESTIONS:
The driveway isn't particularly short. It just that the sidewalk also crosses that driveway and I can't block it. The other problem with the driveway is that it is a fairly steep incline up to the garage. The issue that it creates is that when the boat is in the correct position in the driveway, the tongue is so close to the ground that the jack no longer has room to deploy/lock in place to allow the trailer unhook from the ball hitch. Also, even if I could manage to unhook it, having the boat sitting there with the tires chocked and at such a steep decline freaks me out. I can't get passed the feeling that someone would kick the chocks out just to be an asshat. It's possible that I could back it in at an angle to unhook but I'm still doubtful. Not to mention the other issues it would cause. I also can't park on my side of the street because the cluster mailbox is in my yard. I would be blocking that which, you guessed it, is illegal. I understand that all of this sounds like a bunch of BS but if you have ever dealt with an HOA, then you have a decent idea how dumb those can be.
We would love to move to something better but until we sell our home back in ND and the USAF decides to promote one of us again, this is where we are stuck.
Also, I have yet to find a storage unit that has electricity in a unit big enough to fit a boat. And I have called a ton of them!