BFL13 wrote:
Gutsy move! Good work!
Well you don't want more than 15.4v ever to stay inside the fridge controls limit, so it looks like you have some weird choices, but not impossible.
Set it higher so it does whatever it gets to for that 15 minutes while you have the fridge off for that 15 minutes and not need the inverter (won't run at over 15) and then get the steady state to be 14.x as high as you can. (14.8 being ideal but not compulsory.)
Once you get to 90% or so where amps are down, swap over to your finish charger that has low amps but high voltage and carry on from there if your PM's new Vabs is lower than you like. Or else just leave the PM run at the voltage you got it to do after the 15 min is up.
Very interesting! The Paramode converter also had a little pot like that and when it was jacked up it changed both its voltages higher too. Rising tide floats all boats kind of thing.
the higher voltages will work great in colder weather... and that's when i'll need a big amp charger to replace more Ah usage. so that could work to my advantage.
??? is it o.k to just turn the fridge off, or should i have it set up so i can disconnect the power to the fridge easily?
??? fridge controls aside, would rising to say 15.5v during boost, (then dropping to 14.5 Vabs) do damage to the plates? i'm guessing heat would be the biggest factor here?
i don't use the inverter during charging, anyway, so that won't be a problem. and the resulting surface charge voltage can't be more than the abs charge voltage, so it shouldn't effect the inverter either... but thanks for pointing that out. it's something to take into consideration when setting the Vabs. i'll have to review the xantrex 1000's parameters.
i think you said earlier 90% would be about 5amps per battery at 14.8 Vabs. if so, i now only have 2 batts in series, so that would be 10amps. but my gophert 16v/20a power supply will do 20amps at 14.8v, so i could switch to it well before 90%, yes? (or would the lower powered power supply not do as well as the 75amper anyway?)... that said, any idea what the amps would be at 90% at say 14.2 Vabs ? thanks!
