Ground Mounted Solar Projects

Municipal Zoning/Planning Approval (566 Municipalities in NJ) All land development activities in the State of New Jersey require some level of Municipal approval. Typically, solar farms require site plan approval from...

Here is a video I found on the internet, produced by American Apparel. I figured I would share it as an example how NOT to clean PV panels.

At this site, the intermodule wiring is zip-tied to the rails but the string homeruns are laying loose on the roof, which is poor workmanship. Over time the rough shingles will wear away on the insulation compromising its integrity and putting the...

Many roofs are designed to support thousands of pounds of HVAC units and large air handlers, so the additional weight of an inverter is feasible in many cases.

A roof drain clogged causing the water to rise in the surrounding area. This installation has poor wire management, as shown by a connector sitting loose on a ballast block. Once the water rose and got in the connector, it began to short out (burn...

Be careful with Aluminum Conductors

The cost savings of Aluminum conductors is too good to ignore. Both the engineer and the electrician must respect the differences between copper and the less forgiving aluminum. However, if designed and installed...

When deciding what size and quantity of combiner boxes to use, always remember to use the full capacity of what you are buying.

On our first operation and maintenance trip to this site, we discovered an old broken module stashed under a HVAC unit. This module was not secured, and would surely have become airborne during a hurricane or tropical storm. This module could have...

Value Engineering Combiner Boxes

You can save up to 25% on combiner boxes and DC disconnects switches if they are properly designed. It is well known that you size equipment for 1.56x of the short circuit current. However, with certain solar...

Over the years, we have seen just about every combination of equations and numbers used to calculate the NEC required values on a DC disconnect switch. NEC requires these values to be calculated and shown on the DC disconnect switch, but it doesn't...

Two things went wrong here. First, the vegetation was not maintained, allowing it to grow tall enough to shade the modules and cover the modules in lots of pollen. The second mistake is improper seeding. If the site has proper low-growing ground...

This installer gets full points for creativity, but fails miserably for inappropriate construction means and methods. These cables are not protected from physical damage, and they are not outdoor rated so the UV rays will deteriorate the cables...

NEMA 3R and 4 inverters and outdoor cabinets may be rated for outdoor use, but any scratches in the paint will expose the metal to rusting. Once the rust gets a foothold, it will quickly spread. In this case, the corrosion should be sanded, primed,...

PVC conduits are acceptable when used properly (lots of expansion joints). Metallic conduits (EMC, IMC, RGS) are more expensive, but should be in areas subject to physical contact with other items (such as riser up walls, in electrical rooms, etc)....

Solar arrays are valuable revenue generating assets that require a certain amount of maintenance. How much exactly depends on what type of installation we are talking about (ground mount vs. roof mount), the size of the installation (obviously...