i noticed that the float high relay turns off when the whizbang jr senses a big current. like turning on the kettle the float relay turns off to come back on again after the kettle is turned off. that is with a full battery. just wondering if it is supposed to do it.
i don't like it because it is setting my inverter to bulk then back to float again and in the course resetting the SoC counter in the inverter.
No, not normal as far as I know.
Check the negative battery cable connections including the
shunt nut tightness.
Shunt is also the common for WB Jr. and thinking maybe there
is a possible voltage drop during the high current ?
Are you using the Aux1 relay or its output logic voltage for the float high ?
Aux 1 negative is also tied to negative when jumpered for logic voltage
mode. (12V to 15V logic or so) But not tied when jumpered for relay contact.
boB
hi Bob,
thanks for replying.
there is maybe 1V voltage drop at the battery terminals when kettle turned on. so i doubt lose terminals. but can check.
in the status panel: "charge status" remains in float
however the green light to the left of the power meter in the status panel turns off when kettle turned on, after the kettle turned off, the green light comes on again. in tandem with the selectronic inverter.
aux1 is set to "float high" and "auto"
quote: Are you using the Aux1 relay or its output logic voltage for the float high ?
i suppose it is the relay. i am not aware i can connect somewhere else. just next to where the whizbang jr is connected.
i might try float low and the reverse the inputs in the selectronic. but suspect i will have the same problem.
it is not a major problem. but it resets the SOC in the selectronic. the selectronic can be programmed to charge the battery at low SOC automatically from grid, so i try to keep the feature. but for real SOC checking the midnite classic is very accurate and i relay on its SOC value.
thanks for taking the time to respond, greetings urs
the aux float high also turns off after change over from absorption to float. the midnite classic goes into resting mode after a while until such time the battery voltage reaches float voltage.
AHA ! I think I know what it might be and it WOULD actually be normal for this !
When the Aux output is set to "Float" (active high or active low), it will go
to that state whenever the Classic goes to float...
When your big load comes on, I think the Classic is probably going into "Float MPPT" ?
Unless the PV source can supply the complete load and the Classic can keep the battery
voltage at the Float voltage, the battery voltage will drop below that set-point and
go into Float MPPT. Float MPPT is not the same as Float voltage regulation and so
the Aux output would go inactive at that time.
Trying to think of how you might be able to make it stay on after it has transitioned
from Absorb to Float until the next Bulk/Absorb cycle. For instance, if you could
trigger the Aux output to turn on as long as the Classic is NOT in Bulk or Absorb,
then I think that this is really what you want.
boB
thanks Bob,
yes an "aux bulk low" might do it. it is also supposed to work when rebulking.
basically the selectronic has to be switched to the same settings like the midnite classic. that enables the selectronic to export the surplus solar into the grid. the main problem though is the resetting of SOC in the inverter.
at the moment i put the selectronic "bulk input" command on a timer that switches on for a minute at midnight. that works pretty good, except in a midnite classic rebulk event. but i would really have to flog the battery or lowish SOC.
yes and of course this is not the fault of the midnite. i appreciate your concern though
thanks again and greetings
urs