JBPohle - nice installation
. I like the fiberglass
angles you used. I may get some of those.
MaineSail - The Mastek is running at 15-16A when starting on each cell so is about 75% of the 20A capacity. I took that from one of your posts or from your blog. It is taking about 5-6 hours per cell to go from the 3.29v they came up to 3.61-3.62v when I take them off as single
cells. Getting them to 3.65 on a single
basis is very dicey as it is close to the knee and the Masteck's "fine voltage" control is not very fine at all. I end up just barely tapping it to get it close. I will put the whole set in parallel at the end and do them as one for the final push to a consistent 3.65V. Note: The Mastek manual emphasized the importance of not having the charge wires connected to the battery
when turning it on, and never/ever turn it off with it connected to the batteries. I warm it up for 15 minutes with the terminals off and then put it on each cell. I take them off before turning the power supply off. They say it will severely damage the power supply to turn it on or off while connected.
Typhoon, - I too have printed out MaineSail's blog and have underlined and marked it up extensively. Your advice is well taken. I look back at it all often as my brain can't retain all the important little tidbits forever.
Aside - Nigel Calder has an interesting article in this issue of "Sail Magazine" entitled "Hybrid Redux". It is not about using lithium batteries as house batteries except in a few references
in building a complete hybrid propulsion
system (serial or parallel) that also includes charging
house batteries as part of the whole management scheme. As he notes, it has been a mixed bag as far as workable systems for the masses, with some slow progress being made. He does give a synopsis of state of the art battery
types, giving a nod to carbon and thin plate AGMs. He seems to think they will eventually get good enough so that lithium is not required.
I am continuing to rewire my DC panel and at the point that I am stubbing all the DC positives to terminal strips. It is tedious and time-consuming with many opportunities to make a mistake with re-labeling each wire. I'll then take new wires from the terminal strips to my new BS panel in a nice tidy fashion. I'm excited. Then it's on to the big cables
(and getting the three 8D AGMs out. I'm glad I have some strong friends who owe me. Putting in the lithiums will be a snap! Each set of four cells in parallel are exactly 30# including end plates. And they will fit where one 8D sat.
As always, keep the suggestions coming!