Solar Articles

New PV system owners will have until the end of 2019 to qualify for the full 30% Investment Tax Credit (ITC) before its inevitable step-down. The clock is ticking! The ITC is the most impactful...
Support Article
2/26/2019
  • NEC 2017 Rapid Shutdown
Most electricians and solar installers across the country are intimately familiar with the National Electric Code (NEC). Published every three years by the National Fire Protection Association (NFPA...
Support Article
12/19/2018
  • Google Reviews
Online reviews are the new form of marketing currency for solar installers. Once a homeowner or business is approached by a solar salesperson, one of their first actions will be to Google the...
Support Article
11/20/2018
  • close more solar sales
While there is a lot of excitement about solar energy, it can, and often does, take a long time to educate a customer on why they should actually invest in “going solar.” The good news is that taking...
Support Article
4/17/2018
When designing a PV system that is tilted or ground mounted, determining the appropriate spacing between each row can be troublesome or a downright migraine in the making.  However, it is important...
Support Article
5/21/2015
  • Solar Inverter String Design Calculations
For many new to photovoltaic system design, determining the maximum number of modules per series string can seem straight forward, right?  Simply divide the inverter’s maximum system voltage rating...
Support Article
5/9/2015
  • Supply Side Tap
A supply side tap is a connection that is made to the busbars or conductors on the line or utility side of the main service disconnect. The line side tap the simplest way of interconnection when...
Support Article
12/9/2014
  •  AC or DC Coupled
It seems like a small amount of confusion exists about photovoltaic systems utilizing battery backup features.  What’s the confusion?  DC and AC-coupled systems are many times referred to as the same...
Support Article
11/28/2014
  • Determining Snow and Wind Loads
      Introduction As one of the largest and most established vertically integrated photovoltaic (PV) manufacturers on the planet, SolarWorld is intimately involved with every...
Support Article
1/7/2014
  • Sun Energy Output Solmetric Insolation Tool: Honolulu
Azimuth is the array’s east-west orientation in degrees. In most of the solar PV energy calculator tools, an azimuth value of zero is facing the equator in both northern and southern hemispheres....
Support Article
11/24/2010