![]() ![]() The white wire goes to the small terminal on the side of the shunt that connects to the negative battery terminal.ģ. So it needs to go inside the battery compartment.Ģ. The red wire with the fuse and the big end goes to the positive terminal of your house battery. Remove the fuse before connecting the wires.ġ. One end of the cable has connectors on the wires. There are 4 wires â€" one white, one red and two black. Step 4: The diagram for the wiring is not as complicated as it first appears. It is very interesting to see the amps generated by solar and the amount going into (or out of) the battery at the same time. You will have to drill one or more holes to run the wiring harness After adding a solar panel we put the monitor for the solar controller next to the battery monitor. We mounted ours on the back of the pantry cabinet above the TV. Pick a place it will be easy to run the wiring harness to. Step 3: You will need to locate the display in some visible location. This is a Group 24 deep cycle Exide battery. It is mounted to the same post as the heavy white wire providing 12 volt power used for starting the Onan generator. You can also see the red wire from the Trimetric wiring harness attached to the positive terminal. Inside the battery compartment you can see the new cable for the shunt exiting the battery box. You should keep cables as short as possible. Various lengths of battery cables are available at auto parts stores and online. If the negative cable currently going to the battery is not long enough to reach the shunt, you will need to replace it. You will need to buy at least one additional length of battery cable to go from the negative terminal on the battery to the shunt. That means that the cable (or cables) currently going to the negative terminal (or terminals) on the battery with go to one side of the shunt and you will add a new cable from the other side of the shunt to the negative post on your battery. ![]() Step 2: The shunt is installed on the negative side of the battery. The radio rear speaker and the propane detector are also in this area. ![]() These holes were later sealed so any battery gases would vent through the proper vents rather than into the coach. In our case there was room just outside the battery compartment which is a vented compartment under the driver’s side dinette seat. Depending on the location of your battery (or batteries) this may be easy or difficult. Find a place near the battery to install the shunt. We found the wiring diagram for the Trimetric to be rather confusing, so we later drew our own version of it to hopefully be a bit clearer than the one with the instructions: The cable is long enough for the largest Class A, we just left the excess coiled up in a storage compartment. The shunt is necessary to get current readings. The shunt looks intimidating, but it is not hard to install. The Trimetric comes with a display unit, a shunt, and a very long cable. We got our Trimetric 2025RV from Randy at Randy is very helpful answering questions and giving advice. It was said to be easier to set up and use than monitors of similar capability. After reading up on the options, we settled on the Trimetric. The easiest way to keep track is a battery monitor that does more than measure voltage. ![]() You can use a hydrometer and check each cell for an accurate reading, but that is a pain, and impossible if you have sealed batteries. And your battery always has some load unless you have disconnected it. You can use a volt meter to do a slightly better job, but the problem is that unless the battery is sitting with no load for a period of time, the reading will not be accurate. It uses voltage levels to change the color of the lights. The idiot light panel is almost (but not quite) worthless for monitoring the condition of your house battery or batteries. ![]()
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