Morningstar’s new Ethernet MeterBus Converter (EMC-1) enables IP-based network and internet connectivity to compatible Morningstar products for remote monitoring and configuration of system settings. Here are the top 5 advantages of the EMC-1 versus other serial converters on the market: 1. Wide operating temperature range from -40°C to +60°C and conformal coating designed for the harshest off-grid environments. 2. Wide operating voltage range allowing a single product to be compatible with 12, 24, and 48 volt battery systems. 3. Auto-detection and configuration when connected to compatible Morningstar products. 4. Low power consumption (2W maximum). 5. Simple connectivity via an RJ-11 port.
Morningstar has recently updated its online String Calculator. This powerful tool can assist you with proper sizing of the solar array for all of our MPPT and PWM solar controller models. Our recent update adds over 15,000 new solar modules including many of the newer 300W+ models. These 72 cell modules are perfect for use with any Morningstar MPPT controller or PWM solar controller that supports 24V batteries. The String Calculator provides a quick and easy way to determine the number of solar modules that can be configured in series and parallel based on battery, controller and temperature conditions associated with your system. The underlying database of module specifications is professionally managed and updated by the manufacturers themselves, ensuring a complete and accurate listing for the global market. In the off-chance that your particular module is not in our database, you can also choose to manually enter module specifications. To view a short video that will help you learn about how to best use the string calculator, click here.
Question: Can you use two 72 cell modules in series with a TriStar MPPT to charge a 48V battery system, or do you need three modules? Answer: Yes, unless the system is located in an exceptionally hot desert climate, or you are worried about voltage drop from a long wire run from the array to the controller. But as long as your voltage at max power (Vmp) is slightly higher than your target battery voltage, two 72 cell modules will serve you well. For a 48 volt nominal battery, your target battery voltage will likely be close to 60 volts depending on the battery brand. And two 72 cell modules should supply much more than 60 volts even in hot temperatures as long as you’re not in Death Valley or some similar extremely hot climate. We have received a number of questions about this over the years, where people thought they might need 3 modules, when it fact 2 modules would suffice.
Morningstar offers a Relay Driver (model # RD-1) which can be used for many of the same functions as an auxiliary (IN or OUT). Each RD-1 has 4 channels that can be used as inputs or outputs for Low Voltage Disconnect, Vent Fan, Alarm notifications, or Genstart. Output Channels can be turned on or off based on standalone relay driver values or information from other Morningstar devices on a MeterBus network such as: Thresholds (Voltage, Current, Temperature, % PWM Duty Cycle) Selected Alarms and/or Faults PC or MODBUS inputs over the RS-232 Serial data connection Advanced options allow users to use use the relay as a timer switch or to custom program delays.
Dip switch settings to configure battery charging, system voltage, and load/lighting parameters are included in the ProStar MPPT Operator’s Manual. But in the event that you don’t have a manual handy, you can also find these dip switch settings on the inside of the removable wire cover, and on the inside of the Wire Box accessory.