The TriMetric is used to monitor battery systems used in remote homes, RV's or boats that have batteries that store solar, wind, or possibly generator powered chargers. They will help you maintain your batteries. The cost is under $200, including a \"shunt\", which is required, and which in some systems is already installed.

All models are designed to monitor the following:

• \"Percent Full\" (\"State of charge\") of your batteries, so you can see if you need to charge them more, or check that overall usage is less than your charging resources.
• Volts of the batteries, for example to check that they are being charged at proper voltage.
• Energy going in, or out of your batteries, measured in Amps or Watts, so you can see that your charging sources are charging properly, or how much current your loads are using.
• How many days since the batteries were fully charged: to remind you to not wait too long between fully charging your batteries to maximize their life.