The basic goal of ASTM E2848, “Standard Test Method for Reporting Photovoltaic Non-Concentrator System Performance,” is to compare the ratio of a PV power plant’s actual in-field performance to its expected performance based on a system model. As I discussed in a previous article, the most important things for beginners to understand about PV capacity […]
For IPPs that acquire solar assets after projects are developed and designed—rather than during development or design stages—there are relatively fewer opportunities to fix design problems or engage in value engineering. Nevertheless, it remains important to engage an owner’s engineer (OE) or independent engineer (IE) earlier rather than later in order to ensure safety, quality […]
Independent power producers (IPPs) have different business models for solar asset acquisition. Some IPPs actively engage in development activities, such as site selection and preliminary design studies. Other IPPs look to acquire PV power systems that are under construction. There are also IPPs that specialize in acquiring operational assets. Regardless of the IPP’s business model, […]
As an Owner’s Engineer, PV Pros often supports clients by making strategic decisions about how best to repair, re-power, or optimize the performance of operational solar assets. In this role, our team of experts and engineers often relies on record drawings that the installing contractor handed over to the owner upon project completion and acceptance. […]
Mother Nature provides an unlimited source of clean energy from the sun. However, she also has a dark side that can wreak havoc on your array. As your Owners Engineer, PV Pros ensures the assets you build and acquire are designed for all the conditions it will experience in its 25+ year life, but also […]
PV connector mismatch is one of the most common solar project deficiencies. In our work as an Owner’s Engineer, PV Pros identifies mismatch connectors on roughly 25% of our clients’ projects. While PV connector mismatch is a persistent and potentially severe problem, it is also entirely preventable with proper design, documentation, and due diligence. What […]
Through our work as an Owner’s Engineer, PV Pros has extensive experience evaluating, inspecting, and commissioning PV power systems. While I-V curve tracing is an essential tool in these efforts, it is not necessarily the best tool for every job. Moreover, some common pass-fail metrics involving I-V curve tracing may not be adequate to achieve […]
The strategic and efficient use of resources for PV system commissioning and operations and maintenance (O&M) are critical to optimizing solar PV power system revenue and profitability. Through our work as an Owner’s Engineer, PV Pros has formalized procedures for ensuring installation quality, and identified opportunities to streamline inspection and commissioning activities while minimizing risk. […]
At PV Pros, our project managers and engineers use photovoltaic simulation software developed by PVsyst, Folsom Labs, and the National Renewable Energy Laboratory (NREL). By having access to and experience with multiple complementary tools, we are able to select the best software for specific applications—depending on the use case, target audience, or project stage. Here […]
There is a well-known business adage called the “Cost of Quality”. This is a sliding scale that says, the closer to completion a project gets, the more expensive it is to fix quality issues. Quality comes in the form of Time (schedule) and/or Cost ($$$). Project Management textbooks call these the “triple constrains” as […]
Torque is a commonly used term in Solar PV system inspection, which refers to the act of tightening a mechanical fastener. The fastener can cover a wide array of details, not limited to attaching structural members, electrical connection and weather tight seals on conduit and enclosures. Why is This Important for Owners and Financiers? Under […]
By the end of 2019, Verizon will obsolete its coverage on legacy 3G networks. ATT will follow suit by 2021. The time to implement a replacement plan is now. Why is this important for owners and financiers? Connectivity to a site is the lifeline for asset managers and owners. This allows for performance monitoring, but […]
Spring cleaning also applies to solar! After harsh exposure to winter’s snow, ice, and rain, systems benefit from routine inspection and maintenance. This ensures performance will be optimal as the season progresses. Why is this important for owners and financiers? The solar peak generation season is April through September. Unplanned outages in this season costs […]
Capacity and performance ratio tests are used to demonstrate the performance of PV plants to buyers or lenders and de-risk their acquisition. One popular test is ASTM 2848-13 “Standard Test Method for Reporting Photovoltaic Non-Concentrator System Performance”. The goal of this test is to compare the ratio of a modeled system vs the actual system performance, and the system should perform the […]