OPERATION

CHARGER MODE

AC SOURCE

 

AC

 

CHARGER

DC

 

BATTERY

 

IN BRIEF

When AC power is available, the inverter can operate as a very powerful battery charger with low current distortion. Power is drawn over the full AC cycle. This improves the performance with low AC input voltage or with small generators.

The SW Series Inverter/Charger includes the ability to automatically “back-off” the battery charger to prevent overloading a generator or tripping a circuit breaker when other AC loads are being operated through the inverter. This improves system reliability and allows greater use of the power available. The charger will also be turned off if the AC voltage drops to an adjustable lower limit VAC setting.

THREE STAGE CHARGING PROCESS

The charging cycle uses three stages. During the initial "Bulk Charge" stage, the inverter charges at maximum rate allowed by the SET MAX CHARGE AMPS AC setting. This causes the battery voltage to rise over time. After the battery voltage nears the SET BULK VOLTS DC setting, the charger starts the second or “Absorption” stage. During this phase, the charge rate is gradually reduced while the battery voltage is held near the bulk voltage setting. This ensures that the battery is fully charged. The final "Float" stage is initiated when the battery has been held near the SET BULK VOLTS DC setting for the adjustable ABSORPTION TIME period setting. At this point, the battery voltage is allowed to fall to the FLOAT VOLTS DC voltage setting, where it is maintained until another bulk charge cycle is initiated. This reduces gassing of the battery and keeps it fully charged. A new three-stage charge cycle is initiated after an AC source is reapplied to the AC HOT input terminals, or daily if the BULK CHARGER TRIGGER TIMER (15) is enabled and if AC power is available continuously.

 

Bulk Stage

Absorption Stage

Float Stage

Charging

 

 

Bulk Volts Setting

 

Started

 

 

 

 

 

 

 

 

Absorption Time

Float Volts Setting

 

 

 

 

DC Voltage

Increased Voltage

 

Constant Voltage

Reduced Voltage

 

 

 

Max Charge Amps

 

If a generator was started automatically by the

 

Setting

 

inverter to charge the battery, it will be shut off when

 

 

 

the charger reaches the float stage after the

 

 

 

bulk/absorption period. (GENERATOR must be in

 

 

 

AUTO mode)

AC Current

Constant Current

Reduced Current

Reduced Current

 

 

 

 

 

Time

Figure 21, Three-Stage Battery Charging

Page

64

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

Page 71 Page 73
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Xantrex Technology SW Series owner manual Charger Mode, Three Stage Charging Process, AC Source Charger Battery
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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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