Vector MAXX SST VEC054D User Manual download pdf (Page 12)

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.

Note:

All operating time curves assume permanent installation with the appropriate

DC input wire (See the “Specifications” section on page 16) and a full charge

on the batteries.

For example, as shown in the above graph, using a 400 A/h battery (batteries), if the

average power usage will be 1000 watts, the operating time will be about 150

minutes. 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 capacity battery

will not be subject to deep discharges. Ideally, the number of amp hours (A/h)

you expect to use should be less than 50% of the battery’s rated capacity.

Protective Features

LOW BATTERY ALARM

An audible alarm will sound when the 12 volt DC power supply voltage drops down

to 10.5 ± 0.3 volts. This indicates that the battery needs to be charged or there is an

excessive voltage drop between the battery power source and the inverter.

Notes:

It is normal for the alarm to sound when the inverter is being connected to,

or disconnected from, a 12 volt DC power source. This does not indicate a

problem. However, if this alarm sounds continuously, discontinue inverter

operation and charge the battery before resuming operation. If the voltage

drops to 10.0 volts DC, the inverter will automatically shut down.

If the low voltage alarm sounds when the battery is fully charged (refer to

the “Fault Protection and Troubleshooting Guide” on pages 15).

CIRCUIT PROTECTION

The inverter has electronic circuit protection against overload or short circuit

conditions.

Power

Watts

Level

Amps

100 10

200 20

300 30

400 40

500 50

600 60

700 70

800 80

900 90

1000 100

50 A/h

120 A/h

200 A/h

400 A/h

OPERATING TIME CHART FOR LOAD AND BATTERY CAPACITY AVAILABLE

Minutes 15 30 45 80 75 90 105 120 135 150 165 180 195 210 235 240

Battery Operating Times

Note:

For typical heavy-duty uses, Vector recommends a specified or equivalent ANL

fuse be added as close as possible to the power source (battery) positive

terminal. The fuse amperage size must be appropriate to allow simultaneous

operation of all the AC appliances to be powered, with delay characteristics

that allow for the momentary high start-up current requirements of inductive

loads. Use the recommended fuse block (fuse holder) and fuse, or an electrical

equivalent. For full rated output and motor start-up surge output, ensure that

the installation is configured to handle the full load. See “Specifications” on

page 16.

Determining Battery Size

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

MAXX SST

™

inverters, 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.

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.

Keep in mind that some appliances are not drawing the same power continuously.

For example, a typical home-use coffee maker draws 500 watts during brew time

(approx. 5 minutes), but maintains the pot temperature at only about 100 watts.

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

Runtime

The following graph is a set of curves that show how appliance load, in watts or

in amperes, affects runtime. 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 drawing current from the batteries

Three 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,

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

BATTERY CHARGING

FROM COMMERCIAL

AC, ENGINE, SOLAR, ETC.

BATTERY

(MAX FEET OF

AWG WIRE)

(See “Specifications, page 16.)

ANL FUSE

FUSE HOLDER

(MAX FEET OF

AWG WIRE)

(See “Specifications, page 16.)

FUSE TO BATTERY LENGTH

+ FUSE TO INVERTER LENGTH

MAXX SST

™

POWER

INVERTER

Battery

Configuration

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Vector MAXX SST VEC054D User Manual Page 12

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