TM-2030 Quick Reference

Pr or AP: Power (“Pr” on display indicating watts) or current (“AP” on display indicating “amps”)
depending on whether the amps primary display was set (using program P4) for amps or power,
respectively. This allows both Watts and Amps information to be available in all cases; as one is
available as primary information, the other is available as secondary information.
rPC: Excellent way to tell if correct charging has taken place. Percent returned from last discharge
period. Because of batteries’ inherent inefficiency, it is necessary to recharge batteries with more energy
than was last taken out. Flooded batteries require 10 to 20% more charge than was removed. AGM
batteries need about 5-10% more. During battery discharge, the value shown is usually zero. While the
battery is being charged, shows the percentage of charge added compared to amount of charge
previously removed: anywhere from 0% to 120%--or much more if your last discharge was small.
Push RESET while showing this display to see lowest amp hours of the previous discharge—
upon which rPC is based. If the base number is small because the discharge was light, a large value
of rPC isn’t problematic. ”
The following three are not shown on front label. They only show when the SC-2030 charger is
connected and communicating with the TM-2030, and when the sun is shining on panels.
SOL: Solar amperes: the amount of current being delivered by the solar panels from the SC-2030.
UPr: Unused solar power in watts: shows if extra power is available from the sun that could be used when
battery charging is tapering down in the afternoon. Run appliances such as a dishwasher or vacuum
when this extra power is available, which would otherwise be wasted. Displays “YES” when nearly all
solar power is available for extra use; if a number is displayed, it shows watts available.
°C: The battery temperature in degrees Celsius (when temperature sensor is present).
2.2 Programmable Settings. Two sets of programmable settings are available. The basic set is always
available. The advanced set is only available only when the “user level” has been set to L3 or higher using
program setting P7.
2.2.1. Basic Programmable Parameters
P1: Charged voltage set point: The battery is signaled as “charged” when volts exceeds the P1 value,
and charging amps is less than as described in P2, below. P1 is also the “absorb voltage” set point
for the SC-2030 charger when used. Default “14.3”
P2: Charged amps set point: The charged setpoint amps (mentioned in P1 above) is the percentage in
P2 times the value of amp hours in P3. If P2 is 2.0, and P3 is 220, then the setpoint amps value = 4.4.
It also signals the SC-2030 to go into “finish charge” mode. Default “2.0”%
P3: Battery system capacity in Amp-Hours (10 to 9990 A-hr). Default “220”
P4: Choose either amps (“A”) or power (watts) (“Pr”) to be in the primary display group. Default “A”
P5: Days since charged alarm set point (off, 0.0 to 250 days). Default “Off”
P6: Days since equalized alarm set point (off, 0.0 to 250 days). Default “Off”
P7: User “complexity” level. L1,L2,L3,L4. L3 or L4 is required to access “advanced” program
parameters. Default L1
2.2.2. Advanced Programmable Parameters-accessible only when Program P7 is set to L3 or L4. Default
values shown below are automatically installed when switching from L4 or L3 into L2 or L1.
P8: Maximum voltage limit:
SC-2030 solar charger only: this limits the maximum charging voltage. Default 65.0
P9: Lo-battery audible alarm: based on % full and battery voltage. Set “low % full” alarm point with P9
(OFF, 1-100%). Set “low threshold volts” at P13 below. Default “OFF”.
P10: Efficiency factor (60-100%): This parameter affects how the “% full” is evaluated. Discharging amp-
hours always evaluated at 100%. Charging amp-hours evaluate at an amps rate determined by this
setting. This compensates for battery charging inefficiency. Default 94%
P11: Shunt type: “H” means 500A/50mV. “L” means 100A/100mV. Default H
P12: Auto Reset On-OFF: When OFF percent full and amp hours are not automatically reset. Default ON
P13: Low battery voltage alarm setting: (10.0-65.0 V) Default: 10.0 Audible alarm also controlled by P9
P14: Maximum finish-charge time in hours until float,
SC-2030 solar charger only: (0.0-5.0 Hr.)
P15: High finish charge voltage,
SC-2030 solar charger only:: (10.0-65.0 V)
P16: Float voltage setting:
SC-2030 solar charger only: (10.0-65.0 V)
P17: Shows how many hours after “now” that daily history data H7, H8 ,H9 will be recorded: (0-24)
P18: Battery calibration voltage adj. Rarely needed.
See TM-2030 User’s Instructions, Section 6.4, P18.