Vector MAXXSST 2200 Manual do Proprietário descarregar pdf (Página 16)

Inductive loads, such as TVs and stereos, require more current to operate than do

resistive loads with the same wattage rating. Induction motors, as well as some TVs,

may require two to six times their rated wattage to start up. Since the

MAXXSST

™

2200 inverter has a peak power rating of 4,500 watts, many such

appliances and tools may safely be operated. The equipment that needs the high-

est starting wattage are pumps and compressors that start under load.

This equipment can be safely tested. If an overload is detected, the inverter will

simply shut down until the overload situation is corrected.

4.2. Determining Battery Size:

To determine the minimum battery size that you will need to operate appliances

from the MAXXSST

™

2200 inverter, follow these steps:

1. Determine the wattage of each appliance and/or tool you will need to

simultaneously operate from the inverter. To do this, read the labels on the

equipment to be operated. Usually, power consumption is shown in watts. If it

is shown in amps, multiply by 110 to determine the wattage.

2. Estimate the number of hours the equipment will be in use between

battery recharges.

3. Determine the total watt-hours of energy use, the total running time and the

average power consumption.

To get an estimate of the current (in amps) that the power source (battery) must be

capable of delivering, divide the load consumption power (in watts) by 10. Keep

in mind that most appliances are not operating for long periods of time. For

example, a typical home-use coffeemaker draws 500 watts during it’s brew time

of 5 minutes, but it maintains the temperature of the pot at about 100 watts. Typical

use of a microwave is only for a few minutes, sometimes at low power. Some

typical exceptions to brief operating times are lamps, TVs and computers.

4.3 Battery Operating Time

FIGURE 7 is a set of curves that show how appliance load in watts or in amperes

affects operating time. These curves are only estimates of operating time,

dependent upon:

• The condition of the batteries

• The state of charge on the batteries

• The amount of other DC appliances are drawing current from the batteries

• The length and gauge of the connecting cables

Four curves were developed for a battery of 50 Ampere Hours (AH) capacity and

three for multiple batteries in parallel. The higher capacity curves are for 120 AH,

200AH and 400AH capacities. These large capacity batteries clearly extend

operating time at full load. To extend operating time, in general, reduce the heavy

appliance load to a minimum. Remember, you are operating on stored energy and

probably under power loss conditions. All operating time curves assume permanent

installation with the correct wire gauge and full charge on the batteries.

For example, as shown in FIGURE 7, using a 200 amp hour battery (batteries) if

the average power usage will be 1000 watts the operating time will be about 60

minutes or one hour. A larger capacity battery will deliver more operating time

between recharges.

NOTE: The manufacturer recommends conservative estimates when selecting a

battery. More amp-hours will deliver a reserve capacity and a larger capac-

ity battery will not be subject to deep discharges. Ideally, the number of

amp-hours you expect to use should be less than 50% of the battery’s

rated capacity.

Figure 7.

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