Commissioning a new lithium-ion battery within a Sunny Island system takes only minutes. In this Tech Tip video, the SMA Solar Academy demonstrates the simple commissioning procedure for a Sunny Island system with a battery that uses an external battery management system, or BMS.
Photovoltaics are becoming a reality in Chile, one of South America’s fastest-growing emerging markets with a high potential for solar energy generation. The impending construction of two solar facilities in the Coquimbo Region stands as evidence that the area is ready for large-scale solar technology to offer cost-competitive electricity for the regions inhabitants.
Believe it or not, code references for determining the calculation to adequately size a PV inverter breaker are longer than the calculation itself. Don’t be intimidated into making a costly mistake when designing a customer’s solar system.
The calculation is simply the maximum output current of the inverter multiplied by a 125 percent safety factor, then rounded up to the nearest breaker size.
In 2008, the National Electrical Code (NEC) added a second paragraph to 690.7(A) stating, “When open-circuit voltage temperature coefficients are supplied in the instructions for listed PV modules, they shall be used to calculate the maximum PV system voltage as required by 110.3(B) instead of using Table 690.7.” This addition was made because Table 690.7 is very conservative and the temperature coefficient will provide a more accurate voltage increase.
The solar industry is changing rapidly; new policies, regulations and requirements are being implemented at all levels of governance. As PV penetration increases, the need for changes in regulation follows the need for grid safety, stability and increased PV expertise within utilities and grid managers. Examining these trends from a global, national, statewide and local perspective will be critical to understanding how to navigate future regulations in an effort to achieve grid stability and the continued growth of PV.
Project developers, EPCs, utilities, financiers and other PV project stakeholders are relying on utility-scale photovoltaic systems for long-term energy production and profitability. These systems have proven to be viable sources of electricity as their power-producing capacity is realized.
The lights shined bright and the excitement flowed from the center of the ring—Solar Power International 2014 attendees flocked to The Main Event in Las Vegas to see SMA’s line of champion inverters. From October 21–23, the Las Vegas strip embraced solar power to take in the industry’s latest and greatest.
Module-level monitoring offers users the most granular reporting possible – and now SMA is offering it at no cost for the life of new Sunny Boy 240-US systems purchased throughout the remainder of 2014. The monitoring package is exclusive to micro inverter and Multigate packages and the system must be purchased by December 31, 2014.
San Diego, a city where the only thing more abundant than sandy beaches and palm trees is sunshine. San Diego Eco Rentals, a provider of environmentally-friendly high-end vacation rentals in San Diego’s most vibrant neighborhoods, hired Sullivan Solar Power to take their newest rental property to the next level of eco-consciousness.
Summer is fast approaching and though that means more hours of sunshine, for most of the U.S. it also means hot days and plenty of them. A well-known fact about PV arrays is that as temperature rises, system voltage drops and can fall dangerously close to the lower edge of the Maximum Power Point Tracking (MPPT) window.