OPERATION

The system should be designed so that the battery is able to operate the loads for the entire peak rate period without reaching the low battery transfer voltage. This may require that heavy loads be operated only during the non-peak rate period.

This mode may be advantageous when the utility offers time-of-day metering that allows you to buy power at a variable rate during different time periods. For example, the rate may be only $0.04 per kilowatt-hour from midnight to 6 AM, but $0.16 during the peak period from noon to 6 PM. The in-between periods might cost $0.08 per kilowatt-hour. The idea is to not use utility power during the peak period and to charge the battery at night, during the off-peak period. A solar array is not required but, since it produces the most power during the peak period, it will reduce the amount of power required from the battery.

The greater the difference between the peak and off-peak rates, the greater the value of this operating mode. When combined with a solar array, this mode may be more economic than operating the system in low battery transfer mode.

If the battery is full and power is available from the solar array, it will be used to directly power the AC loads connected to the inverter output, even though the utility grid is also connected to the loads. If the amount of power exceeds the AC loads connected, the battery voltage will increase. An external solar array controller is required to limit the battery voltage to a safe level and to prevent overcharging and possible damage to the battery when only light loads are being powered.

Note: The round-trip net energy efficiency of charging and discharging a Deep Cycle battery rarely exceeds 50%. In order for this technique to be cost effective, the off-peak rate foe electricity should be no more than half of the on-peak rate. The cost of battery replacement should also be calculated and included when evaluating this technique.

To program the inverter for the example above:

•Set the SET GRID USAGE menu item, under the INVERTER SETUP (9) menu heading, to FLT.

•Set the START CHARGE TIME menu item, under the GRID USAGE TIMER (18) menu heading, to 6 PM (18:00).

•Set the END CHARGE TIME menu item, under the GRID USAGE TIMER (18) menu heading, to NOON (12:00).

•Set the SET START BULK TIME menu item, under the BULK CHARGE TRIGGER TIMER (15) menu heading, to a time after MIDNIGHT (00:30) to delay most of the recharging for the cheapest period.

•Setting the SET FLOAT VOLTS DC menu item, under the BATTERY CHARGING (10) menu heading, to the nominal full battery voltage level will reduce the amount of battery charging that occurs between time periods, yet will allow limited charging to prevent sulfation of the battery while sitting partially discharged.

2001 Xantrex Technology, Inc.

Telephone: 360/435-8826

SW Series Inverter/Charger

5916 - 195th Street N. E.

Fax: 360/435-2229

Part No. 2031-5

Arlington, WA 98223

www.traceengineering.com

Rev. C: February 2001

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91

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Xantrex Technology SW Series owner manual Operation
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SW Series specifications

Xantrex Technology has established itself as a leader in innovative power solutions, and its SW Series inverters epitomizes this commitment to quality and efficiency. Designed for both standalone and grid-tied applications, the SW Series offers versatile power management for a range of residential and commercial needs.

At the heart of the SW Series is its advanced pure sine wave output, ensuring clean and reliable electricity suitable for sensitive electronics. This feature makes it an excellent choice for applications such as solar energy systems, where it provides high-quality power for a variety of devices, from household appliances to complex machinery.

One of the key characteristics of the SW Series is its modular design, which allows for easy installation and scalability. This modularity enables users to expand their power system as their energy needs grow, making it an ideal choice for both small and large installations. The inverters come equipped with a user-friendly interface, providing clear information on system performance, battery status, and more, ensuring that users can effectively monitor and manage their energy consumption.

The SW Series inverters also incorporate cutting-edge technology, such as the patented Power Factor Correction (PFC) feature, which optimizes energy efficiency by reducing harmonic distortion. This translates into less wasted electricity and lower energy costs, making it an environmentally friendly option for users looking to reduce their carbon footprint.

Another notable feature of the SW Series is its ability to operate in extreme conditions. Built with robust components and advanced thermal management systems, these inverters can withstand a wide range of temperatures and environmental challenges, ensuring reliable performance in various settings. This durability makes them suitable for off-grid applications, including remote cabins, RVs, and boats.

Furthermore, the SW Series supports a variety of battery types, including lithium-ion, AGM, and gel batteries, offering flexibility for users to choose the best energy storage solution for their needs. The sophisticated battery management system ensures optimal charging and discharging, prolonging the lifespan of the batteries and enhancing the overall efficiency of the power system.

In summary, Xantrex Technology's SW Series inverters stand out for their pure sine wave output, modular design, energy efficiency features, and robust performance in challenging conditions. With their versatility and advanced technology, they cater to the evolving needs of today’s power consumers, making them a compelling choice in the modern energy landscape.
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