Alternative Power Solutions – 2.1 KW photovoltaic system
March 22, 2010
The Maxie Moderne townhomes each feature a 2.1 KW photovoltaic grid tied system. This system is based on an estimated 900 kWh consumed per month that will offset 23%* of the average energy usage from the electric grid. The turn-key system is designed, engineered and installed by Alternative Power Solutions.
Tax credits
Solar generation systems are eligible for the 30% federal tax credit on the installation cost through year 2016. Complete details and refund forms are available on the Energy Star website.
Details on the Maxie Moderne townhomes development Solar Generation system
The system is placed on the 4th floor roof above the tree line and angled with the existing pitch of the roof towards the South at a 30 degree incline. Solar production is based on roof area that is free from shading between 9am – 3pm during the year.
- 12 Suntech Panels (175 Watt each) in each array for 6300 Watts total (3 arrays)
- Residential Inverter – PV Powered DC/AC Inverter
- Location – roof mount above tree line South facing at 30 degree incline
- Peak PV required to perform 23% offset - 2.1KW DC
- System AC power rating – 1.62 KW AC
- Solar isolation for Houston area = 4.8 kW/sq meter, per day
- Estimated production rates 210 kWh per month
Typical Grid-tied system description
Solar array roof installation process
Step 1 – Brackets mounted after felt paper installed
Step 2 – Waterproofing flashings installed over each mounting bracket during roof shingle installation
Step 3 – Rails installed to mounting brackets
Step4 – Solar Panels installed to roof rack railing
Step 5 – DC to AC inverter mounted in the garage adjacent to the electric service panel with exterior safety disconnect located on backyard of each home.
* Usage based on a family of four. Usage will vary based on how conservative individual homeowners are.
