Adding to Jay, you really need to charge lithium based on Soc. Just not reliable in wind and water because of the damage potential to use voltage. Another way to say it, it is just too easy to use Soc.
Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail [email protected] text 209 813 0060 On Sat, 12 Sep 2020 10:24:24 -0700, Jay <[email protected]> wrote: > Hi Bill, > > My preference is with using an aux relay off of a classic, I don’t use a > C40. > > In using different equipment C40 and PV CC they will never be the same > reading and kinda fight with each other. Using a classic it diverts based > on hysteresis setpoints off of charge settings. And you can get the > diversion controller trying to dump PV if they get off settings or timing > from EQ h other. > > And then you have the issue of which lithium battery. Some have no > variation between charge voltage ( hard)and max shut down voltage, others > have a few volts (easy). > > But yes it’s harder than flooded, but kinda like using VRLA batteries. > > The OB fm60/80 the aux isn’t temp comp’d but not an issue with lithium. > The classic has 2 aux so you can do one normally and one as the failsafe/ > redundant which you need anyway. > > You can also do a diversion based on % or volts, and if it’s behind > diodes then it wont see the batteries. Giving you a closer voltage control. > Again no c40 in my view. > > > Hope that helps > > Jay > > > > > > > >> On Sep 12, 2020, at 9:44 AM, frenergy <[email protected]> wrote: >> >> Dearest off-gridders, >> OK, many of you micro-hydro fanatics on the west coast are >> stuck inside with all the smoke, time to put on your tin >> foil thinking caps.... >> >> I brought this up some time back but got little (zero maybe) >> feedback. I'm hoping there are some other micro-hydro folks >> out there that have figured out how to marry a Harris pelton, >> to a L-ion battery for charging. Outputs vary with >> rainfall/snow-melt from 3 amps to 28 amps (24V). Over the >> years with LA batteries, I've simply used a Trace C40 PWM CC >> between the battery and mondo load resistors (two >> configurations due to varying hydro output). Of course >> sometimes the output and resistor load did not match and I'd >> be sending 2,3, maybe 4 amps to the 1270 Ahr Battery which at >> times was already floating. This system is also fed with >> about 2800 watts of PV, ala FM80 CC. >> >> >> This must not have hurt the battery too much as they are 17 >> years old and still pretty happy. However, L-ion is not >> going to be happy with this configuration and would require >> some way to provide a perfect match of hydro output to dump >> load when it reaches its full charge to insure its not >> over-charged (AKA destroyed). Will a Classic deal with this? >> Other ideas? Experience is golden. >> >> Bill >> >> >> Feather River Solar Electric >> Bill Battagin, Owner >> 4291 Nelson St. >> Taylorsville, CA 95983 >> 530.284.7849 >> CA Lic 874049 >> www.frenergy.net >> >> >> -- >> This email has been checked for viruses by Avast antivirus software. >> https://www.avast.com/antivirus >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org _______________________________________________ List sponsored by Redwood Alliance List Address: [email protected] Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
