Session 20a

Stand-Alone PV Systems, Part 2

Design Considerations – Residential Scale

November 10, 2015

Session 20 content

Stand-Alone ResidentialPV Systemso Scale of stand-alone systemso Design basicso Inverter and battery selectiono BOS components

2

Learning Outcomes

An examination of the original photovoltaicsystems at the residential scale.

3

Stand-Alone PV Systems – The Design Process

Design steps in a stand-alone PV system

1. Examination of site and estimation of performance

2. Securing financing3. Carrying out PV system engineering and

designa. Electrical loads (DC and/or AC)b. Connection to charge controllers and batteriesc. Selection of inverter and BOS

4. Securing relevant permits5. Construction6. Inspection7. Performance monitoring

4

Stand-Alone PV Systems – Design Steps

Steps in stand-alone PV design

1 Evaluation of solar availability, electrical consumption, essential electrical loads

1 Battery selection

2 PV array sizing

3 Module selection

4 Charge controller selection

1 Inverter selection

1 Balance of system

5

Stand-Alone PV Systems

Stand-Alone Residence: Floor Plan

6

Stand-Alone PV Systems - Residence

7

Stand-Alone PV Systems

Stand-Alone Residence: Battery Requirements

8

Stand-Alone PV Systems

Stand-Alone Residence: Array Orientation

9

Stand-Alone PV Systems

Stand-Alone Residence: Wiring

10

Stand-Alone PV Systems

Stand-Alone Residence: Wiring Diagram

11