TriMetric Model Descriptions

TriMetric Model Descriptions

TM-2030-A and TM-2030-RV. Our most recent TriMetrics. They give a high degree of insight into your battery set. Although it will work with any charger or solar charge controller, the Bogart Engineering SC-2030 Solar Charger is specifically designed to partner with the newer TriMetric TM-2030. To see what’s involved to install it, download “Brief Overview of Installation Requirements” in the brown column below.

Click on any image below to enlarge the view.



TM-2030-A. Shown with “double gang” electrical box not included







The TM-2030-A and TM-2030-RV are operationally identical to each other and are  similar to the previous TM-2025. The  difference between the “A” and “RV” version is only the size and label color. The TM-2030-RV includes the enclosure shown. The TM-2030-A mounts in a double gang electrical box not included. At some point we are expecting to offer only the TM-2030 models. Older ones will be supported however.

● Measures battery % full, based on amp hour measurements for accurate information on how much battery energy is left. This method is more accurate than monitors that use only voltage to determine how full your batteries are—especially when they are between 30-90% full. Battery system size: 10-10,000 amp hours.

● Measures battery charging or discharging amps—or watts; To check that chargers are still charging at proper amounts—also to check to see how much your loads are drawing—and to discover phantom 24 hour loads that you may not know about.

● Measures battery volts (9.0 to 75): to verify that chargers are charging to correct voltage for your batteries.

New with the TM-2030: Audible low battery alarm, based on volts and % full. May be silenced.

● Measures days since charged:  Shows how many days have elapsed since batteries were last fully charged. Batteries can lose ability to hold charge if this becomes too long.

● Shows days since equalized: A reminder to equalize at appropriate time if you do manual equalizations.

New with the TM-2030: Displays replaced percentage of charge, compared to most recent discharge–Many battery company experts are now recommending that when recharging, 110-120% of recently withdrawn energy should be replaced for wet cell Lead acid batteries to prevent loss of capacity—and 104-108% for AGM types. This new function makes it easy to know if they have been sufficiently charged.

● Good lightning protection.

● Easy to read display–easy to darken.

● Defaults to “Level 1” for most users to keep operation simple. Choose Level 2 or 3 for more technical users.

● Logged data functions: You may not need this, but a technician trying to diagnose what is wrong will find these very helpful:

Data for each of last five charge/discharge cycles:

● Length of the cycle.

● How long ago the cycle ended.

● Lowest % full reading

● Lowest battery voltage.

● Cycle charge efficiency (percent)

Data for each of the last five days.

● Highest voltage that day.

● Lowest charging current.

● Total percentage overcharge for that day.

● Sizes: smaller (RV) is 3 x 5-1/4 x 1-3/8 inches deep. Larger (A) is 4-1/2 x 4 -3/4 x 1-1/4 inches deep.

● Requires one of two shunts: 500A/50mV shunt allows amp measurements from 0.1-over 400 Amps. 100A/100mV shunt allows amp measurements from 0.01- over 70 Amps. Larger shunts allow higher current limits.

For more details see reference literature to right.

TM-2025-A & TM-2025-RV

Previous model TriMetric. The TM-2025 has all benefits of the TM-2030 except for the following:

● Does not have Replaced percentage of battery charge display.

● Does not have Audible alarm.

● Cannot be used to provide the high degree of control of the new SC-2030 Solar Charger.

If you are familiar with the TM-2025 operation, click on the following document to see how the TM-2030 has changed: ”Differences from TM-2025 to TM-2030

TM-2020 (No Longer Available)

Previous to the TM-2025. The TM-2020 has the same “Volts” “Amps” “% full” displays as earlier models. However the successors to the TM-2020 have some significant improvements:

● Easier programming.

● Lightning protection and 48V operation included.

● Easier to mount option (“RV”) that includes enclosure.

● More useful History data.

Here are some significant differences:

● TM-2025 and TM-2030 have a “simple” operating mode that can be selected. The “simple” one works for most users, and is simpler than the TM-2020.

● TM-2020 did not have watts measurement capability.

● For history data, the TM-2020 could only record “lowest voltage,” “highest voltage” one value at a time—these needed to be manually reset for each reading. The TM-2025 and TM-2030 measure “highest voltage” for each of the last 5 days, and require no manual reset. It measures lowest voltage in each of the last 5 charge/discharge cycles, with no manual reset required. It lacked some of the other logged data functions.

● More difficult to enter program values.

● Required extra cost adapter work on 48V systems and provide good lightning protection. Enclosure was extra cost item.

The TM-2 and TM-1 were the earliest made TriMetric. These were made only up to about 1998. Instruction manuals are available on line. We will still repair these if we can, however we no longer make new circuit boards for these.




Made in the U.S.A – 4 Year Warranty