100kWp System in Australia
100kWp Inverters Compared: SolarEdge vs. Schneider
Modules Used: Canadian Solar CS6U-340M CPTL
In 2006, SolarEdge invented an intelligent inverter solution that has changed the way power is harvested
and managed in PV systems. Since beginning shipments in 2010, SolarEdge has shipped more than 4.7
GW of its DC optimized inverter solution and its products have been installed in PV systems in more
than 100 countries, making it a top 3 global inverter manufacturer.
SolarEdge Commercial Solution
- More energy – module-level optimization
- Longer strings – reduced BoS cost
- Enhanced O&M – module-level monitoring
- Superior safety solution
A Higher Lifetime Value
The SolarEdge optimized DC inverter solution enables higher system lifetime value by increasing revenue and reducing installation and maintenance costs. Power generation is optimized at the panel level, which minimizes power losses and leads to a higher lifetime revenue from the PV systems. While the initial cost of the SolarEdge solution is generally slightly higher than the equivalent traditional inverter system, the total installation cost, such as BoS components, as well as the lifetime operations and maintenance cost, is lower. This makes the SolarEdge solution a more economically attractive throughout the system lifetime*.
System Design Alternatives
Modules: 294 x Canadian Solar CS6U-340M CPTL = 99.6 kW DC
Two inverter alternatives were considered for this project
- 4 x SE25k inverters
- 147 x P700 power optimizers
This document shows the installation and lifetime maintenance cost savings when using SolarEdge
compared to a traditional system.
Additionally, a PVsyst analysis shows the added energy for SolarEdge vs. a traditional system on
BoS Cost Saving
Introduction – Longer Strings
The SolarEdge system works at a fixed string voltage, which allows connection of much longer strings compared to traditional inverters.
Typical String Layout Comparison
The diagram below shows an example of a module block with a string design for SolarEdge Vs. a typical string inverter. SolarEdge fixed string voltage allows for longer string, reducing the amount of DC cabling. In this example, SolarEdge manages to 70% less string cabling than the string inverters
Single Line Diagram
Typical Inverter Schematic
All final designs are at the discretion of and responsibility of the site project engineer
Note – In a SolarEdge system, the string current is limited to the optimizer’s maximum output current, even if module current increases due to ambient conditions. Therefore no safety margin is needed when calculating maximum string current.
SolarEdge String Layout Example
Sample 30 modules string
- Longer strings lead to reduction in cabling cost as well as ease of design and installation
- In this project, it is estimated that SolarEdge will save 49% of the BoS cost compared to Schneider*
- The plans below show strings layouts for SolarEdge and Schneider. The green lines represent additional DC cabling required for the home runs
Notes – SolarEdge configuration has 10 strings only comparing to 16 strings with competitor. Which resulting to less DC cabling, less DC cabling losses, less incidence of Insulation faults which may avoid late start of inverter (at morning hours)
– Competitor inverter require additional cost for Datalogger, it’s Warranty Extension cost and Monitoring portal extra fee (if exist)
Enhanced Asset Management
SolarEdge power optimizers constantly monitor the performance of the modules to which they are
connected, providing full visibility into system performance and enabling real-time fault detection and
Module issues such as underperformance, can be either detected
remotely on the monitoring platform, or notified by automatic alerts, and their location will be pinpointed on a virtual site map, thus reducing
the number of site visits, and the time spent on site.
Superior Safety Features
PV systems are safe and do not inherently pose danger to people or property. However, with a traditional inverter, as long as the sun is up, PV wires are energized with high DC voltages.
With SolarEdge, whenever AC power is turned off, DC wires are designed to de-energize providing automatic protection to installers, maintenance personnel, firefighters and property. The SafeDC™ feature meets the highest German and European safety standards (VDE 2100, IEC 60947).
SolarEdge inverters comply with the UL1699B arc detection standard designed to mitigate the effects of some arc faults that may pose a risk of fire