PD or Iota for my upgrade?
I'm thinking about a converter and battery upgrade. The batteries will be wet cell lead acid 6 volt Possible T-105s or the 230AH, EGC2 from Sam's club. I'll probably go for four. (Does nayone have...
Forum Discussion
BFL13 wrote:
Fisherguy's PD9280, second graph
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/24129716/srt/pa/pging/1/page/1
Note the first replies wrt the four hours.
Thanks. I appreciate the link. It looks like it shifted modes after about 3 hours. Perhaps Fisherguy was testing with the PD entering boost/bulk mode on its own, rather than from the manual button, as I tested. My battery bank is also about twice as large as the one he tested, so that may be why I haven't seen that auto-switching behavior.
It also looks like the PD being sold does not exactly follow the patent description of its charge profile.
One other comment on the Fisherguy plots:
He's got a 0.3 volt voltage drop on the charge cables at about 60A. With his limit of about 14.55 volts, he can't get the battery above about 14.25 volts without decreasing the current flow (to decrease the voltage drop in the cables).
He'd get a huge improvement from doing what I did - 1) using heavier gauge cables and 2) bumping up the voltage. I have about 0.1 - 0.15 volts drop in the cables and the higher voltage lets my modified PD take the battery to 14.65-14.7 before it has to cut back the current.
