xcmg concrete mixer,volumetric concrete mixer,new concrete mixer truck for sale,concrete mixer Xinghan Muzhi Digital Technology (Xuzhou) Co., Ltd. , https://www.steelkingkong.com
When to use PVsyst, HelioScope, and SAM
At Pure Power, our project managers and engineers leverage photovoltaic simulation tools from PVsyst, Folsom Labs, and the National Renewable Energy Laboratory (NREL). By having access to multiple complementary platforms, we can choose the most suitable software based on the specific needs of each project—whether it's for financial modeling, design validation, or performance analysis. In this post, I’ll share a high-level comparison of when and why we use PVsyst, HelioScope, and SAM.
---
**PVsyst**
PVsyst is the go-to tool in the solar industry for bankability analyses and performance testing. Its long-standing reputation stems from its robust capabilities and the trust stakeholders place in its results. Accurate energy modeling is critical for financial models, capacity assessments, and performance reports. However, accuracy isn’t just about the software—it’s about how it’s used. Over time, experience and knowledge build confidence in the outcomes.
As an owner’s engineer, Pure Power has run thousands of performance models and analyzed countless operational systems. This process involves collaboration with developers, EPCs, OEMs, engineers, researchers, and financiers, all of whom benefit from shared insights and best practices. The result is modeling that aligns with industry standards and is supported by real-world data.
PVsyst’s history dates back to 1992, when André Mermoud, a physicist from the University of Geneva, began developing the software. It was fully rewritten in 1999 with a graphical interface, and over the past two decades, it has continued to evolve with updates tailored for U.S. projects. This long-standing presence has made it the industry standard for financial underwriting, with many projects relying on its models for billions in investments.
From a power user perspective, PVsyst excels in granular loss analysis—covering irradiance, array, and system losses. It allows detailed tracking of module quality, string mismatch, soiling, wiring, inverter, transformer, and auxiliary losses. It also simulates degradation and aging effects, which are essential for understanding long-term performance. With Version 7.0, PVsyst now supports advanced features like bifacial modeling and larger-scale projects, making it ideal for complex engineering tasks.
---
**HelioScope**
HelioScope, developed by Folsom Labs, is a cloud-based platform that’s gaining popularity during the early stages of project development. While it uses similar core calculations as PVsyst, it offers a more intuitive, user-friendly interface with Google Earth and SketchUp integration. It’s OS-agnostic and doesn’t require heavy processing power, making it accessible for sales and development teams without deep engineering expertise.
In residential applications, HelioScope’s shading and energy models are often accepted by jurisdictions and even used for financing. However, for commercial and utility-scale projects, PVsyst remains the preferred choice due to its higher level of detail and industry recognition. HelioScope is particularly valuable for preliminary designs, remote site assessments, and quick financial estimates, helping reduce soft costs and improve efficiency.
---
**SAM**
SAM, developed by NREL, is a free techno-economic tool used for analyzing renewable systems, including PV and solar-plus-storage. Originally called the Solar Advisor Model, it was created in 2005 and later renamed to reflect its broader application across various technologies. While it’s not typically used for project underwriting, it’s trusted by researchers, policymakers, and program administrators for its validated methodology.
For example, the National Electrical Code now references SAM’s calculation method for determining maximum PV system current, showing its influence in regulatory frameworks. Though not the first choice for financiers, SAM provides a reliable, third-party validated approach that complements other tools like PVsyst.
---
By using these tools strategically, Pure Power ensures that each project benefits from the right level of detail, accuracy, and support—whether it’s for initial design, financial modeling, or long-term performance monitoring.