I showed my very discerning (engineer) wife your build. "Great, lets build one", she replied. So you apparently have created a project for us a few years down the road.
Well, I have always said I do my best at being a bad influence

. If you have a spouse that is also interested in this kind of life you are fortunate. Luckily Heather is also hooked on adventure/international travel. We have seen a lot of couples out sailing when just one of them is interested, usually means the trip is cut short.
I may have missed it previously in this thread (if so let me know and I will go hunting), but did you post up the details on your battery pack build up? At your leisure, I would enjoy a quick rendition now that you have it up and running.
I don't think you missed it as I don't think I ever went into much detail. Unfortunately the truck build is one hold for a few weeks as we really needed to catchup on boat maintenance before the upcoming winter, so just a quick one. Any specific questions just let me know.
So, we have the 16 cells bolted together in a 4P4S configuration. The monitor I have (
Thornwave Labs) does not have a balancer built in so I bought 4 of them to keep the cells in balance. I also have a low voltage disconnect from Thornwave. As things settle out I will decide how much I like the Thornwave stuff (still need to fiddle with settings). It currently does not have a display and is solely bluetooth. It is ok, but have gotten used to being able to see the "battery fuel gauge" in passing on the boat. I have 2 solar charge controllers, one with 600 watts, one with 400. Did this for potential shading. The units are fully programmable and I have been tweaking the settings. I did contact Frey (battery manufacturer, they really have been good to work with) and now have their recommendations for charging voltages so I need to go back and make that change. Before we got the solar installed I accidentally allowed the batteries down to 7% (either got to get used to always checking with bluetooth or need a panel). I plugged in the charger (50 amps) and it churned at full capacity for a while. Since the solar panels have been connected the batteries are usually fully charged well before noon. I still need to wire in the Sterling B2B charger, so no alternator charging currently.
On a slightly side note (though eventually battery related). Our new original Coleman Polar Cub rooftop AC was DOA. Since we had it a while before it being installed and wired in (risk for builds like this) we needed to do a warranty claim which requires a dealer to do. So off to Raleigh (2 hours each way) to the closest service center. They confirmed it did not work (real tough huh?) and filed the claim. Coleman immediately approved it and had a replacement unit there in 2 days! The also paid for the swap at the service center so now we have a functioning AC. I bring this up because I had originally thought I would experiment running it off battery power (I know the enormous load). So for kicks I started it on the inverter on the low cool setting. Started right up and the inverter was at 63% (2000 watt sine wave inverter/charger from Renogy, there are a couple of things that are a bit annoying about this unit). I did not have my phone on me (see, more about wanting a monitor panel) but that is roughly a 100 amp load. While the AC was running the batteries were sitting at 13.2 volts. Pretty impressive I think. Tells me I can run the AC for about an hour or 2 to cool the habitat down a bit when needed, and I am very impressed with the insulation of the Total Composites box (at the Expo it got down to 50 at night, with no heat and the 2 of us sleeping in there it was about 70 inside in the morning).
So, in a nutshell how do I like the batteries? Well time will tell but so far I love how light and compact they are, how well they seem to charge (with the continuous 50 amp charge they remained cool to the touch). About the only thing I wish about the batteries is that I would have sprung for another 100 amps (another $400 over the original $1600). Just to give a bit more headroom for the cloudy days and I easily had the space in the compartment. You can never have too much battery power (though you can have too much weight/space with older technology). I settled on 400 amps as that capacity is roughly what we have on the boat (rough conversion as the boat is wet cells) and has worked for us with half the solar. It was also trying to keep some sort of budget on this build as it is easy to get out of hand.
