Battery Information

Battery Bank Sizing

Estimating Battery Requirements

Battery capacity Battery size or capacity is just as important as the battery type selected for use with the Freedom SW 3000. The batteries are the most important part of your system, so Xantrex recommends that you purchase as much battery capacity as possible. A large battery will extend running time and ensure that your inverter/charger delivers full rated surge.

Xantrex recommends a minimum battery size of 200 amp-hours (Ah) for moderate loads (<1000W) and greater than 400 Ah for heavy loads.

See “Estimating Battery Requirements” for information on a more detailed calculation.

About Amp-hoursA number of different standards are used to rate battery energy storage capacity. Automotive and marine starting batteries are normally rated in cranking amps. This is not a relevant rating for continuous loads like an inverter. Deep-cycle batteries use a more suitable rating system such as amp-hours (Ah).

Amp-hour capacity is the number of amps a battery can continuously deliver during a specified number of hours. It is represented by the product of the two —amps multipled by hours.

A typical marine or RV battery rated for 100 Ah can deliver 5 amps for 20 hours (5A × 20 hours = 100 Ah). This same battery can deliver a higher or lower current for less or more time, limited approximately by the 100 Ah figure (50 A for 2 hours or 200 A for 1/2 hour), but usually the capacity figure given is only accurate for the specified duration (20 hours).

Calculating Battery Size

only.

 

Step 1: Compute Amp-hours

installers

For each appliance, compute the number of amp-hours that will be used

 

between charging cycles, as follows:

 

1.

Obtain the wattage. If the wattage is marked on the nameplate rating,

qualified

2.

Obtain the Watt-hours by multiplying that amount by the hours the

 

use that. Otherwise, multiply the marked voltage and amperage:

 

 

WATTS = VOLTS × AMPS.

 

 

appliance will be used:

by

 

WATT-HOURS = WATTS × HOURS.

 

use

3.

Obtain the amp-hours that the appliance requires by dividing that

 

 

amount by 10 (the factor for the Freedom SW 3000, which is a 12-voltfor

 

system):

guide

 

BATTERY AMP-HOURS USED = AC WATT-HOURS/10

 

 

For example, a 100 W light bulb that is used for 4 hours will use 400 watt-

This

hours (Wh) and the inverter will consume approximately 40 Ah from a 12

 

volt battery.

4.Enter this information on the blank calculation worksheet (page 44).

Step 2: Calculate Battery Size

5.Complete the rest of the worksheet; see Table 5, “Battery Sizing Example” on page 42 for an example.

975-0546-01-01

41

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Xantrex Technology SW3000 Battery Information, Battery Bank Sizing, Calculating Battery Size, Compute Amp-hours
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SW3000 specifications

Xantrex Technology SW3000 is a versatile and powerful inverter that plays a crucial role in providing reliable electrical power to off-grid and mobile applications. Designed specifically for those who require a dependable power source in remote locations or for recreational vehicles, the SW3000 stands out with its excellent features and innovative technologies.

One of the primary characteristics of the SW3000 is its ability to deliver a continuous output of 3000 watts, making it suitable for a wide range of appliances and tools. The inverter can handle startup loads for inductive devices, such as refrigerators and air conditioners, with ease. This capability ensures that users can operate their essential equipment without the worry of overloading the system.

The SW3000 inverter is equipped with advanced Pure Sine Wave technology, ensuring that the output power is clean and stable. Pure Sine Wave inverters are crucial for sensitive electronics, as they provide a smooth power output that mimics the utility grid. This feature protects your devices from potential damage caused by lower-quality inverter systems.

Additionally, the Xantrex SW3000 offers integrated features such as an automatic transfer switch, which seamlessly transfers power between the inverter and utility power when both are available. This ensures uninterrupted operation and convenience for the user. The inverter also has a user-friendly interface, including LED indicators that provide information on the inverter's status, allowing for easy monitoring.

Another significant aspect of the SW3000 is its robust thermal management. The design includes built-in cooling fans that prevent overheating during heavy use, ensuring the longevity of the unit. The inverter also comes with multiple safety features, such as over-voltage, under-voltage, and over-temperature protection, offering peace of mind.

Furthermore, the SW3000 is engineered for easy installation, including versatile mounting options, making it an excellent choice for various applications, from boats and RVs to cabins and backup power systems. Its durable design enables it to withstand harsh environmental conditions, ensuring reliable performance in diverse settings.

Overall, the Xantrex Technology SW3000 inverter combines power capacity, advanced technology, and user-friendly features, making it a top choice for those seeking reliable power solutions in off-grid and mobile environments.
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