In Electrical Installation, you move on from the array to complete the assembly of an entire residential system. You begin with a blank wall where you mount the AC disconnect, a revenue grade meter, and a string inverter. Conduit sections are assembled and secured to the roof and walls. You pull wires from the ground all the way up to the array junction box, and then strip and land all your circuit connections on their respective terminals. And you complete your system assembly by placing NEC required labels on all the enclosures and conduit.

In this Solar Inverter Technology course, we look at some common characteristics and safety behaviors of inverters, as well as how they are becoming more interoperable with the utility by defining the new California Rule 21 specifications. Finally we explore in detail the most common types of technology being installed today - string inverters, microinverters and dc power optimizers.

In this Solar Module Design course, we examine the construction elements of a standard module, and then explore alternatives to this 40 year old design. We look at alternative module constructions, and explore how modules can be integrated into building structures as shingles and tiles as well as commercial glass walls. We look at details of how modules are framed, and how the cells in the protected circuits are interconnected with different materials and geometries.

The Solar System Troubleshooting course you will learn to work backwards from a faulted electrical condition to discover the root cause of your electrical problem. Your primary tools are a digital multimeter and megohmmeter, plus your powers of observation. You work through a wide variety of faulted conditions, including no DC power coming from the solar array, no AC power coming from the utility side, and a ground fault indication. You also deal with a system that is fully operational but is producing too little power. By systematically looking for and eliminating typical mistakes, you eventually get to your root cause.

A brief overview of Solid State Electronics as it relates to the residential HVAC industry. In this course we will explore the application and usage of various solid state electronic devices and how they impact circuits in which they are used. This course is intended to provide a basic understanding of the principles of semiconductors and other solid state components. After an overview of individual components, electromagnetic relays are compared to solid state relays. The course will identify how to use the principles behind symbols and diagrams for wiring and electrical considerations.

In the Symbols and Wiring course you will translate everything you’ve learned about HVACR into symbols on a diagram. From relays and contactors, to safety switches and loads, you will understand the reasoning behind each symbolic representation. After you have mastered symbols, you will move on to wiring diagrams, where you will learn the different formats and their advantages in the field. You will learn the standards of HVACR wiring diagrams, which will prepare you to take on any manufacturer’s schematic style. You will use what you have learned throughout the beginning of the course, to transpose real life systems into actual working diagrams.

In this simulation-based course, you'll discover how to install a tankless water heater in the basement of a residential home. This course will walk you through the step-by-step process of how to install a tanked water heater, water piping, gas piping, venting, and condensate piping. With each scenario, you will be guided with realistic steps of interaction to complete the installation process.

In this course we will begin to study some of the science that supports mechanical refrigeration systems: ranging from the effects of temperature on molecular motion, to the different states of refrigerant within a system. This course covers all the physics necessary to really understand how a system works. An overview of absolute and atmospheric pressure transitions to the Pressure-Temperature relationship of fluid is provided and applied analogously to reading and comprehending pressure gauges.

This IV Curves course covers in depth everything you need to know about the IV curve - the most fundamental technical graph in the PV field. The lessons begin with a simple explanation of all the key values that you can get from the curve, how the curve is affected by typical environmental factors like light intensity or irradiance, temperature and solar spectrum, and various test conditions that take these environmental factors into account. Finally, we cover how to use IV curves to learn about an existing system or design a new one. This is a key fundamental course that can firmly ground your understanding of solar PV technology and allow you to understand system performance, sizing and design much better.

In the Thermostats and Heating Controls lesson you will learn about the different types of thermostats, how they work and their applications, as well as the standard for wiring color codes in thermostats. You will discover the many types of controls used on gas furnaces and burners as you view their operations on a wiring diagram. Finally, you will go through some examples of common, complicated issues encountered in the field and realize they're not so complicated after all.