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                                                          General Information

ITC-Series

 Inverter

Page 27

Owner’s Manual 8/07/03

5.5 Sizing the Inverter Battery

Sizing a battery system for an inverter application can be a very tedious task if all the different variables, such as

discharge rate, depth of discharge, and operating lifetime are included in the calculations.  To simplify these

calculations and get a reasonably correct battery size, we will assume:

1) A 50% depth of discharge for the purpose of obtaining a reasonable life time for a reasonable battery

system cost

2) There is no charge current into the battery system
3) The batteries are in a fully charged state at the beginning of the discharge cycle
4) The DC current draw from the battery does not exceed 1/3 the C rate for any length of time.

Follow the steps listed below to find the AH capacity required for your application.
Step 1: Make a list of each appliance, its power requirement in watts, and the amount of time in hours it will be

operating between charging cycles.  Note: If the appliance is rated in amperes (amps) instead of watts,

multiply the amps by the voltage (120 or 240) to get watts.

Step 2: Calculate the watt-hours required for each appliance by multiplying the power requirement by the

operating time of that appliance.

Step 3: Calculate the total watt-hours needed by adding together the watt-hours of each appliance.
Step 4: Find the amp-hours consumed by dividing the total watt-hours found in step 3 by 10 for 12 volt DC

systems or by 20 for 24 volt DC systems.

Step 5: Multiply the amp-hours consumed by 2 (for 50% depth of discharge) to get the battery amp-hour

capacity desired.

Example 1:

Follow Steps 1 through 3 (above)

Appliance

Power Rating

Operating Time

Watt-Hours Consumed

TV, VCR, Stereo

225 watts

2.5 hours

563 watt-hours

Small Refrigerator

300

3.8

1,140

Microwave

800

0.3

240

TOTALS

1,943 watt-hours

 

Step 4: Amp-hours consumed = 1943 watt-hours ÷ 20 = 97.15 amp-hours for 24 a volt system.
Step 5: The minimum battery size for this application is 2 x 97.15 = 194.3 amp-hours.

5.6 Battery and Charging System Considerations

The Battery and DC Charging System is a very important part of your inverter installation.  The Battery System is

responsible for supplying all of the DC power required by the inverter.  The system normally consists of the

primary charger (engine alternator or photovoltaic array), a secondary charger, if used, the battery, and other

equipment which may be used such as battery isolator diodes.  The complexity of the system depends on the

way the inverter is used.  In some cases, such as utility or service vehicles, the system may be as simple as the

engine alternator and the cranking battery that also powers the inverter.  In most cases, additional equipment is

needed to provide additional DC power and/or protection.  These systems can be grouped into two categories,

the single battery and the dual battery systems.
In the single battery system, there is one battery, which is shared for starting the engine and operating the

inverter.  This is a common practice in a service vehicle where the engine runs all the time and allows the

alternator to provide continuous charging for the battery.  In this case, the inverter can be connected directly to

the engine cranking battery. The most important detail of this system is the alternator output rating. The

continuous output of the alternator must be at least as much as the total DC current draw on the system. The

Summary of Contents for ITC-Series

Page 1: ...Owner s Manual 8 07 03 ITC Series Inverter Charger System Model ITC12 2100 and 3200 Vanner Incorporated 4282 Reynolds Drive Hilliard Ohio 43026 614 771 2718 1 800 ACPOWER www vanner com Owner s Manual...

Page 2: ...ITC Series ITC Series Inverter Page 2 7 18 03 Notes...

Page 3: ...1 AC INPUT OUTPUT WIRING 17 3 2 DC BATTERY WIRING 17 3 3 FRONT PANEL CONTROL DISPLAY OUTLET 17 3 4 SYSTEM ON OFF SWITCH 18 3 5 REMOTE SIGNAL CONTACTS 18 4 INSTALLATION 19 4 1 BASIC GUIDELINES 19 4 2 D...

Page 4: ...nch Mount Configuration 10 F 7 Figure 1 4 6 Suspended Dimensions in Inches 11 F 8 Figure 1 4 7 Bottom Mount Dimensions in Inches 11 F 9 Figure 1 4 4 Customer Terminations 12 F 10 Figure 2 2 1 Charging...

Page 5: ...wn on the cover of this manual 1 System Features and Specifications 1 1 General Description The ITC Series system consists of a DC to AC true sine wave inverter a 12 volt battery charger an automatic...

Page 6: ...closes when battery voltage falls below 11 volts This will alert the user to take appropriate measures to avoid shutdown of the Inverter at 10 5VDC I Remote Power Switch This loop between Options Ter...

Page 7: ...ec 6400 watts DC INPUT Operating Range 12 Volt Nominal 10 5 to 17 Volts No Load Inverter ON 4 amps No Load Inverter OFF 0 30 amps Full power 208 amps 350 amps INVERTER EFFICIENCY 12VDC 200 watts 77 50...

Page 8: ...VIEW 3 6 7 8 9 4 5 FRONT VIEW 13 2 14 15 16 10 LEFT SIDE VIEW RIGHT SIDE VIEW 11 12 15 16 OPTIONS CABLE ENTRY CHASSIS GROUND ITEM 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DESCRIPTION BATTERY TERMINAL ACCESS R...

Page 9: ...on flashes when enabled but not on 2 Inverter On Off Button Enables Disables Inverter Function 3 Charger Indicator Light Solid when on flashes when enabled but not on 4 Charger On Off Button Enables D...

Page 10: ...r counter mounting while still allowing access to user AC and control terminals through a removable front cover ACCESS PANEL REMOVABLE FROM FRONT WHEN UNDER TABLE MOUNTED DOCKED DISPLAY CONTROL PANEL...

Page 11: ...Manual 8 07 03 18 10 7 8 19 1 4 13 5 8 16 3 4 8 1 8 7 5 16 8 3 4 ITC DIMENSIONS FOR SUSPENDED MOUNTING F 7 Figure 1 4 6 Suspended Dimensions in Inches 19 1 4 18 10 7 8 16 3 4 13 5 8 7 5 16 8 ITC DIME...

Page 12: ...er Page 12 7 18 03 GND OPTIONS TERMINAL STRIP P14 HOT NEU GND AC INPUT P15 HOT NEU GND AC OUTPUT P6 P5 REMOTE MASTER AND SLAVE CONNECTORS REMOTE SWITCH REMOTE LED COM N O N O LOW BATT COM AUTO THROTTL...

Page 13: ...tery voltage falls below the Low Battery Shutdown 10 5 VDC setpoint the inverter will shut OFF Auto restart will restart the inverter after battery voltage rises above the Low Battery Warning 11 VDC s...

Page 14: ...TIME B U L K A B S O R P T I O N O P T I O N A L E Q U A L I Z E F L O A T TRIGGER POINT F 10 Figure 2 2 1 Charging Voltage Curves Stage 2 Absorption Charge Stage The Absorption Charge Stage provides...

Page 15: ...n Charge Current 40 Amps 40 Amps Absorption Maximum Time 10 Minutes 10 minutes Float Charge Volts 13 2 VDC 13 7 VDC Equalize Volts Wet only 15 5 VDC Not used Equalize Maximum Time Wet only 15 Minutes...

Page 16: ...eserved for future expansion The next switch switch 12 is reserved for selecting a Master Slave remote with multiple Control Display Units Note The figure below is also available on the Rear of the Co...

Page 17: ...e front panel of the unit ONLY There is no need to remove screws from the top or sides of the unit to gain access to the AC wiring compartment Inside the compartment is a terminal strip for making AC...

Page 18: ...er switch is turned off 3 5 Remote Signal Contacts Terminal Contacts provide capabilities for Remote Inverter Power ON OFF and Power indication Remote Low Battery Warning indication and Gen Start Auto...

Page 19: ...or explosion The inverter must not be mounted in fuel storage areas battery compartments or other hazardous areas where potentially explosive gases may be present WARNING It is important to utilize t...

Page 20: ...tment or to enter the inverter in any way Severe inverter damage will result which is not covered by the warranty 7 Do not connect the inverter to the battery at this time Final battery connections wi...

Page 21: ...ent exposing the positive and negative threaded studs B Remove the two flat washers split ring washers and nuts from the threaded studs C Put lugs For the appropriate wire size called out in Table 4 1...

Page 22: ...unding system or to earth ground may result in a lethal shock hazard AC Wiring Procedure refer to Figure 3 1 Warning Make certain that the AC field wiring upper right of the wiring compartment and the...

Page 23: ...y AC loads up to rated output watts to verify full power operation Step 13 Apply shore power After a delay the AC output test light should blink and the ITC Inverter LIGHT should blink indicating the...

Page 24: ...ape of the modified sine wave inverter s waveform includes a square wave component It is stepped in such a way however to closely approximate the true sine wave produced by the electric utility compan...

Page 25: ...The appliance rating is given in amperes so we must first calculate the power it consumes Then the rule of thumb can be used to find the DC input current of the inverter Output power 120 volts x 6 amp...

Page 26: ...y gets older there will be less and less useful material left on the plates and the operating time will become noticeably shorter A battery will age faster loose active material from its plates faster...

Page 27: ...y amp hour capacity desired Example 1 Follow Steps 1 through 3 above Appliance Power Rating Operating Time Watt Hours Consumed TV VCR Stereo 225 watts 2 5 hours 563 watt hours Small Refrigerator 300 3...

Page 28: ...alternator is not running 5 7 Battery Charging Guidelines CAUTION The following information on battery charger setup adjustments should be used as guidelines only Vanner strongly recommends that you c...

Page 29: ...tions are tight and corrosion free 2 Check air ventilation openings for dust and other obstructions 3 Examine receptacle indicators and switches for cracks and breaks in insulation material Trouble Sh...

Page 30: ...System ITC Series Inverter Page 30 7 18 03 Vanner Incorporated 4282 Reynolds Drive Hilliard Ohio 43026 1 800 AC POWER 1 800 227 6937 Tel 614 771 2718 Fax 614 771 4904 www vanner com e mail pwrsales va...

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