![]() Those with two 6 volt batteries may have as much as 220 amp hours. Our single deep cycle battery is 80 amp hours. The Trimetric has a nice display of % full. In addition to the voltage of up to 2 batteries, the Trimetric can display the number of amps being used –or watts if you prefer Don’t deplete a wet cell battery below 50%. With the Trimetric battery monitor installed, we quickly learned and made notes of how much power each item in our Roadtrek used. Shunt on left outside of battery compartment, holes into compartment not yet sealed We mounted the display on the pantry wall above the TV. We ran the wiring harness for the monitor behind the wall panel into the pantry cabinet. Buy a short piece of heavy battery cable, available at auto parts stores, to run from the negative terminal on the battery to the shunt, with the original negative cable attached to the other terminal on the shunt. Installing the shunt requires mounting it in a location near the battery. Maybe the local RV dealer would install it? They were less than enthusiastic, so we carefully read the instructions and did it ourselves. The box arrived with a wiring harness long enough for a Prevost, a rather intimidating 500 amp shunt, and the display to be mounted on the wall. We agree that it has been one of the most useful upgrades we have made to our Roadtrek. We replaced our old battery and we also bought a battery monitor – a Trimetric 2025RV – from. Trimetric 2025RV shows the battery at 100% Only then you can design a good solar system for your needs. One internet site on adding solar to your RV said the first step should be to install a battery monitor and learn how much power you use. But if you spend much time boondocking (unplugged) you should know how much power you’re using and how much you have left. Just remember not to leave your 3-way fridge running on battery when you spend 3 hours in a museum (switch to propane). If you spend all your time in campgrounds plugged into shore power, you needn’t concern yourself much with the house battery or batteries. But until we spent a night unplugged and needing the furnace, we hadn’t experienced a problem. We knew our single house battery of unknown vintage might be weak. It was an unpleasant way of learning that the propane detector in our new-to-us Roadtrek is also an excellent low battery alarm. We had arrived exhausted after changing a flat tire – in the rain – very late the night before and found no available campsites. When the two units are used together, it increases the performance of the charge controller and can adjust the output to a level that is better suited to your batteries current state of charge.Blaaaaaaaaaaah! We woke up to the shriek of the propane detector at 5 am in a parking lot outside a completely full campground on Natchez Trace. The main difference between this model and the older TM-2025-A is that the TM-2030-A is capable of working in tandem with the new Bogart Engineering SC-2030 PWM solar charge controller. The TM-2030 also can measure the voltage only of a second battery set, such as the starting battery, or solar voltage input to a charge controller. The monitor will also tell you the number of days since the main battery system was fully charged, so if it hasn’t been charged recently you can perform extra charging if necessary to help maintain the capacity of your batteries. It will let you discover if your charging systems are charging to the proper voltage, which is important for maximizing your battery life. The Trimetric will help you keep track of how charged or discharged your batteries are. This is a big help when you’re trying to conserve energy. It measures the rate of energy going in or out of your batteries so you can check your charging systems and see how much energy each of your appliances use. ![]() The TM 2030 is intended to help maintain battery systems for 12V to 48V deep cycle batteries, such as ones found in RV’s or off grid homes, which are regularly charged and discharged. Trimetric TM-2030-A Battery Monitor System Set
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