Technical Manual

82 D C U M a i n t e n a n c e a n d O p e r a t i o n M a n u a l
Power
Supply
BATTSize=41 Daily X 03.10.0012
Battery Size in Amp-Hours: The standard Acala DCU2
battery is 31AHrs and the standard DCU 2+ battery is
41AHrs. Incorrect setting of this value will cause
incorrect State-of-Charge values.
Power
Supply
BATTSR=0.004 Daily X
Battery Series Resistance. A measurement to evaluate
battery health. This value is currently in beta and may
be dropped/modified in the future. Accurate BSR
requires a high discharge current that is currently not
activated in the relatively low power DCUs. At this time
the Power Management System provides a much better
estimate of battery health.
Power
Supply
BATTTemp=-011.25C Hourly X
Battery Temperature of the 12VDC battery inside the
outer cabinet. The battery temperature should be
approximately the equal to the ambient outside
temperature plus some additional temperature rise
associated with solar loading and inner electronics
enclosure. This value is available in the DCU 2+ or in
DCUs where a thermistor is installed.
Power
Supply
BATTUV=12.36 Hourly X
Battery voltage reported at the top of the hour when
load is removed. The reading indicates a instantaneous
charge of the battery
Power
Supply
CHARGEConfig=JEITA
Daily, on
charge
Deprecated
Current charge algorithm for determining charge
configuration (from battey chemistry and LTC4015
Register 0x29) which controls the charge voltage target:
JEITA = indicates LTC4015 JEITA temperature qualified
algorithm with C/x charge termination disabled (lithium
chemistry & LTC4015 Register 0x29 bit 0: en_jeita = 1 &
LTC4015 Register 0x29 bit 2: en_c_over_x_term = 0)
JEITA_C/x = indicates LTC4015 JEITA temperature
qualified algorithm with C/x charge termination enabled
(lithium chemistry & LTC4015 Register 0x29 bit 0:
en_jeita = 1 & LTC4015 Register 0x29 bit 2:
en_c_over_x_term = 1)
Power
Supply
CHARGEConfig=TempComp Daily, charge X
Deprecate
d
Current charge algorithm for determining charge
configuration (from LTC4015 Register 0x29) which
controls the charge voltage target:
TempComp = indicates LTC4015 temperature
compensated charge voltage that is used when battery
temperature < 45C (lead-acid battery chemistry &
LTC4015 Register 0x29 bit 1: en_
lead_acid_temp_comp = 1)
Fixed = indicates a fixed voltage setting that is used
when battery temperature >= 45C (lead-acid battery
chemistry & LTC4015 Register 0x29 bit 1: en_
lead_acid_temp_comp = 0)
Source Message Frequency DCU 2 DCU 2+
Mainboard
Firmware
Description