Morningstar Blog

Morningstar Corporation Celebrates 27 Years

April 26, 2020

This month marks 27 years of operation for Morningstar Corporation.

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Do you have a question about solar charge controllers?

March 27, 2020

We recently updated our website to include answers to frequently asked questions about solar charge controllers.  Whether you are new to the industry or an experienced veteran, there is a lot of information on this page including diagrams and video that will help answer your questions.

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Which MS controllers are most suitable to charge lithium iron phosphate batteries?

February 23, 2020

Each month, Morningstar hosts a live webinar featuring the latest in charge controller and inverter technologies.  Whether you are new to Morningstar and off-grid solar, or an experienced professional who is looking for a refresher, this webinar is a chance to learn what is new in off-grid solar and  have your pressing questions answered by one of our engineers. Attendees also receive One NABCEP CE credit.  

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Product Reliability and Morningstar’s Secret Sauce

September 29, 2017

Over the years people have tried to discover the secret of how Morningstar is able to produce such reliable  solar charge controllers.  “What’s your secret sauce?” they’ve asked.  But the secret isn’t in the sauce, it’s in the software. Click here to read more about what one of our distributors learned after interviewing Morningstar’s Director of Engineering about this phenomenon.

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Relay Driver Overview and Applications

September 6, 2017

The new Relay Driver Overview and Applications page provides the latest details about how to setup and use the Morningstar Relay Driver to control mechanical or solid-state relays in AC and DC power systems. Morningstar’s RelayDriver™ is a logic module which provides high level system control functions such as high/low voltage alarms, load control and generator start.

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Updated Morningstar Networking and Communications Document

April 5, 2017

Morningstar’s Networking and Communications Document has been updated to include information about our Ethernet MeterBus Converter (EMC-1) and USB Meter Bus Adapter (UMC-1).  This document indicates how to establish communications with Morningstar products to enable networking, logging, data transfer and custom setting capabilities.  Topics covered include: MODBUS communications protocol MeterBus networks Serial RS-232 and EIA-485 networks Ethernet, HTTP, web interfaces Related hardware and cables  

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Charging Valve Regulated AGM Batteries

March 30, 2017

Did you know that the new ProStar Gen3 solar charge controller is equipped with DIP Switches (switch #’s 4, 5 and 6) that enable seven preset charge configurations and a custom setting to best meet the charging requirements for valve regulated AGM lead acid batteries? Higher Voltage Equalization charging, commonly used with Flooded batteries, can be harmful to valve regulated AGM batteries.  To avoid this problem, auto-equalize options can be disabled for the ProStar Gen3 solar charge controller by switching DIP Switch #7 to the OFF position, regardless of your other DIP Switch settings. The 15 amp and 30 amp Prostar Gen3 models are the newest and smallest Morningstar controllers to include the seven preset and custom charging configurations, and the option to disable auto-equalization. Other larger Morningstar controllers which include similar preset configuration options are the Prostar MPPT, TriStar, and TriStar MPPT controllers.

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Charging NEC Energy Solution Batteries

March 15, 2017

In response to requests from system designers seeking to leverage NEC Energy Solution’s ALM 12V35 batteries with Morningstar charge controllers, an application note was developed through a collaborative effort between the two companies.  Systems incorporating both ALM 12V35 batteries and Morningstar charge controllers are well suited for a wide range of PV+Storage applications.  The information in the application note serves as a guide to help configure settings based on the particular Morningstar controller that is used.  Performance may vary depending on use conditions and application.  [Read more…]

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Remote Monitoring of Off-grid Systems

January 3, 2017

Being able to remotely monitor PV systems is important to reducing time and costs associated with site visits. This is obviously especially important for off-grid systems, which are often in even harder to reach or remote areas—geological monitoring, mines, telecom, industrial automation and agriculture applications. [Read more…]

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Comparing Four Versions of Morningstar 600V Charge Controllers

November 23, 2016

Morningstar’s TriStar MPPT™ 600V Solar Charge Controllers have proven to be a highly reliable solution to enable several application scenarios including: The use of smaller diameter wire to reduce costs and simplify installation. Long wire runs from the array to the controller. New and retrofit grid-tie systems with battery backup. Each of our 600V charge controller SKU’s are pictured and described below so you can make sure you use the version that is most appropriate to meet your needs. TS-MPPT-60-600V-48  Standard version: smallest version that does not have a PV disconnect or transfer switch. This version is most often used in high voltage off-grid residential and telecommunications applications with long wire runs from the array to the controller. TS-MPPT-60-600V-48-DB DB version: includes a disconnect box to disconnect power from the PV array and connection to batteries.  This version is most often used in off-grid residential and telecommunications applications by those who don’t want to be tasked with installing their own disconnect solution to meet safety requirements. TS-MPPT-60-600V-48-DB-TR TR version: includes a transfer switch which directs PV array power to a grid tied string inverter or to a battery bank. This version is used to retrofit grid-tied systems with battery backup for critical loads. TS-MPPT-60-600V-48-DB-TR-GFPD TR with GFPD version: includes a transfer switch and a pre-wired connection to a ground fault protection device. This version is used to retrofit grid-tied systems with battery backup and it meets US NEC requirements for ground fault protection.  

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