Chapter 11
Sizing a Grid-Direct System
IN THIS CHAPTER
Understanding the role budget and space play in limiting an array’s size
Evaluating energy production and consumption
Calculating power values and temperature-adjusted voltages
Checking the maximum current input as the final piece of the puzzle
So you’ve used the information in Chapter 2 to determine that a grid-direct system is the best fit for your client, and you’ve familiarized yourself with the elements of such a system in Part 2. Now the fun really starts — it’s time to size the system! By that, I mean it’s time to match the array to the customer’s needs and to the inverter and associated safety equipment.
When you set off on the task of sizing a grid-direct PV system you need to account for many variables. As you find out in this chapter, the overall process results in a PV system that’s based on the client’s budget, the available area, the annual energy production and consumption at the site, and your choice of materials for the job (notably, the array and the inverter).
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