I'm using the classic 150 with an outback GVFX3624 (GVFX2436?) and am curious as to what component controls my battery charge setpoints? Is it the outback or the classic? It seems to be the outback as no matter what I do I can't make the classic go into absorb. My sell re is set at 27v so of course anything over that gets pushed to the grid so how do I overcome this? Glad I haven't bought expensive batteries yet! :)
The Outback GVFX inverter should hold the battery voltage down and the Classic should try to raise the battery voltage up. If the GVFX can sell more than the Classic and its PV array can not raise the voltage, then the Classic will not go into absorb at that higher battery voltage.
However, the inverter may stop selling power sometimes long enough for the Classic to do an absorb charge once in a while but I do not know (or remember?) when or if that once in a while is. Might only be after a power outage ? But the batteries should receive an absorb cycle once in a while. At least once a week, or two, maybe.
If you don't see that happen, then you may want to disable selling for a few hours during a sunny day once in a while to keep the GVFX from holding the batt voltage down and to let the batteries get a good absorb charge
boB
Micheals,
Gotta say the obvious......you probably paid more for those batteries than you will get for grid tie in pay back.........so charge the batteries full before you sell........but what do I know.....I do not grid tie....but my batteries are charged before I use my convection oven....or just tinkering welding.......but what do I kno.....I get over 10 years on a set of real deep cycles......I.e.....no cranking amps rating....just my two cents
Set your sell at 28.8.......I.e. When you go to adsorb.....then you can afford to.....batteries first!
td