Wagan 2403 User Manual

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Wagan 2403 User Manual Manual pdf 5 page image

USER’S MANUAL — Please read before using this equipment.© 2007 Wagan Corporation.All Rights Reserved.Wagan and Wagan.com are trademarks used by Wagan Corporation.98000W Power InverterBy Wagan Techwww.wagan.com105. PLANNING THE INVERTER SYSTEM 2. Estimate the number of hours the appliances will be in use between batteryrecharges. This will vary depending on appliances. For example, a typical home-use coffeemaker draws 500 watts during its brew time of 5 minutes, it maintainshe temperature of the pot at about 100 watts. Typical use of a microwave oven isonly for a few minutes. Some longer operating time appliances are lamps, TV's,computers and refrigerator/freezers.Larger wattage inverters require planning before installation. There are severalsteps to the planning process. The user must determine the following:1. Maximum inverter wattage required2. Operating time (run time) needed between battery recharges3. Determine the total watt-hours of energy needed. This is done by multiplyingthe average power consumption in watts by the number of hours of run time. Forexample: 1500 watts for 10 hours = 15,000 watt hours.3. Battery bank capacity in amp-hours4. Charger requirement to recharge batteries within a reasonable time.To get an estimate of the maximum current (in amps) that a battery bank must becapable of delivering to the inverter, divide the load watts by ten. For example a1500 watt appliance load will need 150 amps at 12 Volts DC.5.1 Determining The Maximum Appliance WattageUsing the 1500 watts (or 150 Amps) for 10 hours example as above, then 150amps is needed for 10 hours. This provides us with the basic amp-hours (AH) ofbattery that is required. Ten hours at 150 amps equals 1500 Amp Hours (AH).This answer is just a beginning because there are other factors that determineactual run time. These include:Maximum Appliance Wattage is the first factor in planning battery and chargingsystems.Some background:Large microwave oven specifications list cooking power (watts) and appliancepower. Appliance power is the AC load the inverter has to supply.Most other electrical tools, appliances and audio/video equipment have labels thatlist the unit's power requirements in watts. If the tool or device is rated in amps,multiply the amps by 115 (115-VAC) to determine the watts. For example, apower tool rated at 4-amps will draw 460 watts.• AC appliance load and time in use (basic AH)• Cable gage and length (cable losses)• Charge level of the batteries (between use, chargers have to be ableDetermine the wattage of each appliance you need to simultaneously operate. Addall of the appliance wattages to obtain an estimated “total watts” number.Remember to consider the start-up surge that motorized appliances will cause. Donot exceed the surge rating of the inverter.• to fully charge the batteries)• Temperature of the batteries (colder batteries provide fewer amps)• Age and condition of the batteries (older batteries lose capacity)• Compliance with turning off unnecessary AC loads.• Compliance with turning off unnecessary DC loads.At 8000 watts continuous output this inverter requires a DC power supply (batterybank) that can continuously supply 800 amps at 12VDC for the duration of therun time. 5.3 Derating the Battery Bank5.2 Configuring the Battery Bank Most lead-acid batteries have a rating expressed in amp-hours (AH). The mostcommon rating of AH is “at the 20 hour rate”. For example; if a 20AH battery isdischarged at a 1 amp rate, is will take 20 hours to discharge that battery. Theterms “charged” and “discharged” relate to actual battery voltage. This means thatthe output voltage of a nominal 12 volt battery starts at 13.2 volts (fully charged)then drops to 10.6 volts (discharged). If the load on the battery causes the batteryTo determine the minimum battery ampere-hour rating that you will need tooperate appliances from the inverter, and any DC appliances powered by thebattery bank. Follow these steps:1. List the maximum wattage that the inverter has to provide (as above).