Inverters. Inverter Functions Change DC to AC Change DC to AC Increases or decreases voltage from...
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Inverters
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Inverter Functions Change DC to AC Increases or decreases
voltage from array voltage to: 120 Volts 240 Volts 208 Volts
Regulate Frequency 50 HZ 60 HZ
Feed Electricity back to grid
Battery Charging
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Input Ranges
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Inverter Wave Forms
Square wave
Modified Square Wave
Sine Wave
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Types
Stand Alone Inverters Battery based
Direct Utility Intertie No Battery
MultiFunction Battery charging grid tie
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Stand Alone Inverters
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Stand Alone
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Stand Alone Inverters
Considerations Maximum load Maximum surge AC output voltage Input battery
voltage 100 watts to 60 KW Pure sine &
modified sine wave available
High Surge
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Modified Square or Modified Sine Wave Stand Alone
Inverters Types
Xantrex TR Series Samlex
Least expensive - $.29 - .66/watt Some electronic devices may buzz Clocks don’t run accurately Can’t charge battery packs, run laser printers, copiers, light
dimmers, variable speed tools, Silicon Controlled rectifiers High Surge High Efficiency
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Xantrex TR Series Inverters
12 & 24 DC Volt Input
120 volt AC 1500 – 3600 watts Modified sine wave Battery charging
capability $.39 - .58/watt
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Sine wave Stand Alone Inverters
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Magnum
Makes sine wave & modified sine output inverters
600 - 4400 watts 12 – 48 volt models 120 & 240 models $.50 - $1.19/watt
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Over Current Protection
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Sizing Overcurrent Protection
Divide rated output by lowest voltage that inverter will operate at to get maximum AC amps
Divide maximum AC amps by inverter efficiency to get maximum DC amps
Multiply maximum DC amps by 1.25 to avoid exposing conductor or overcurrent protection to more than 80% of its rated ampacity
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Example of Conductor & Circuit Breaker Sizing
2500 watts / 21 V = 119 amps AC 119 AC amps / .93 = 128 amps DC 128 x 1.25 = 160 amps (for
continuous duty) Conductor must have ampacity of
160 amps or more. Circuit Breaker must also have amp
rating of at least 160 amps also, but less than or equal to the ampacity of conductor used
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Direct Grid Tie Inverters
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Direct Utility Tied Inverters
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Direct Grid Tie Inverter
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Direct Grid Tie
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Grid Tie PV System
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Balance of System: Grid Tie
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Sunny Boy Inverter
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Sunny Boy with DC Disconnect
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Enphase Microinverters
http://www.youtube.com/watch?v=Fzj2a-9M4qo
http://www.youtube.com/watch?v=RC3mNUhcx6o
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Dual Function Inverters
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Multi-Function Inverters
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With Batteries & Grid
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Xantrex XW Battery Based Inverter
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http://www.youtube.com/watch?v=I91mHLu1Guw
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Xantrex XW Battery Based Inverter
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Outback Multifunction
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Multi – Function Inverters
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Multi Function Inverters
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Accessories