TM-2030 Quick Reference
1. Primary System Information (most important user’s information) rev. 2-5-16
The most important information on your battery system can be selected by pressing the select button on the
TriMetric front panel to select these three primary items: (Multiply volts by 2, or 4 for 24V or 48V systems.)
1. volts: The voltage of your main battery (if the B1 lamp is on) or the voltage of the secondary battery (if
the B2 lamp is on). Use volts to:
a. Check whether your batteries are charging at the voltage specified by the battery manufacturer.
b. Check whether the batteries are nearing a low state of charge. This would be (for 12V system) when
volts are somewhat less than 12.0 volts. Between 12.0 and 14.0 volts the display is a poor indicator
of state of charge in a working system. Use % full instead.
2. amps (or watts): This mode shows how rapidly energy is entering or leaving the battery. It is positive
when the battery is being charged or negative when the battery is being discharged. This display mode
can be reconfigured (using program P4) to show power (in Watts) instead of showing current (in Amps).
Use amps or watts to:
a. Verify that the charger is charging the batteries at correct rate.
b. Know when to turn a charging generator off. As batteries become more charged, amps to the
batteries will decline. Running a generator with a low charging amps wastes generator energy.
c. Learn the power usage of your various appliances by noting the amps (or watts) difference when they
are switched on and off. Do this when you are not charging batteries.
d. Check that all your appliances are really turned off before leaving home.
3. % Full: This display tells the state of charge (how much energy is left) in the battery on a percentage
scale. Useful to watch while you are discharging batteries. Also use this display to:
a. Minimize generator run time when charging batteries by running it when “% FULL” is low and thus
charging amps are higher. When %FULL is high, finish charging with solar at lower amps and
longer charge times.
b. Observe progress while charging.
2. Additional System Information (less important) The following four displays will repeat as long
as SELECT is held down. Release SELECT when you arrive. Programmable settings and History are
described below in summary form, and described in detail in TM-2030 Users Manual.
1.“AH” Secondary display data: Section 2.1 below. The first five items in this category are listed in
the lower box on front panel of TM-2030.
2.“P1” Programmable settings Section 2.2 below.
3.“H1” History data Section 2.3 below.
4. (shows number only) Primary System data (described above in Section 1).
2.1 Secondary System Information (five items + three more for when using SC-2030 solar
charger with TM-2030)
These are shown in lower box on front label. Push SELECT to advance to the next one.
AH: Amp-hours from full. This is another way to indicate percentage full. When the battery is full, this
value is zero. When the battery is less than full, the value is a negative number, which shows how many
amp-hours should be returned to the battery to fully charge it. Automatically resets to 0.00 A-hr and %=
“100%” when batteries are charged. May be manually reset to 0.00 A-hr (and %= 100%), not usually
necessary, by holding the reset key down for at least five seconds while showing this display.
dSC: Days since charged. This value shows the number of days since the battery was last fully charged.
If batteries are discharged below 90% every day it is important to not leave the battery at a low charge
level for long periods of time. This is only important when batteries are regularly being discharged, not
when sitting unused for days. It is reset to 0 automatically when the “charged criteria” are met, however it
can be manually reset by holding the reset key down for at least five seconds while in that display mode.
dSE: Days since equalized. Provides a reminder for when to perform a manual equalization. Shows how
many days have elapsed since the last time the battery was equalized. This number is not automatically
reset; it must be reset by holding the reset key down for at least five seconds while in that display mode.
With SC-2030 charger also accesses manual equalization: See SC-2030 User’s Manual, Sec. 6.6.