PV System for prt 3 of Final Exam Question #4 Load Estimation WorksheetIndividual QTY X Volts X Amps = Watts X Use X Use / 7 = Watt Hours

AC DC hrs/day days/wks AC DCclock radio 1 X 120 X 0.04 = 5 X 24 X 7 / 7 = 120well pump 1 X 220 X 0.91 = 200 X 1 X 2 / 7 = 57

X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X . = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0

Individual

refrigerator 1 X 24 X 4.7 = 112 X 7 X 7 / 7 = 784single light fixtures 6 X 24 X 4 = 96 X 2 X 2 / 7 = 55ceiling fan 2 X 24 X 2.9 = 70 X 7 X 2 / 7 = 140

X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0

AC Total Connected Watts 205 AC Average Daily Load 177

DC Total Connected Watts 278 DC Average Daily Load 9791156

48.2ah

AC Loads

DC Loads

Load Estimation WorksheetIndividual QTY X Volts X Amps = Watts X Use X Use / 7 = Watt Hours

AC DC hrs/day days/wks AC DCrefrigerator 0 X 120 X 3.8 = 275 X 7.2 X 4 / 7 = 1,131lights 5 X 120 X 5 = 125 X 5 X 7 / 7 = 625washer 1 X 120 X 11.7 = 1,450 X 1.5 X 1 / 7 = 311dishwasher 1 X 124 X 12 = 1,500 X 0.5 X 1 / 7 = 107tv 1 X 120 X 1 = 390 X 0.75 X 2 / 7 = 84 X X = X X / 7 = dvd 1 124 X 0.08 = 10 X 1 X 2 / 7 = 3microwave 1 X 120 X 7.4 = 920 X 0.25 X 4 / 7 = 131

Individual

X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0X X = 0 X X / 7 = 0

AC Total Connected Watts 4,670 AC Average Daily Load 2,392

DC Total Connected Watts 0 DC Average Daily Load 0

AC Loads

DC Loads

Battery Sizing Worksheet

/ + / =

4,670 / 0.9 + 0 / 24 = 195

X / / =

195 X 2 / 0.5 / 220 = 2.0000

/ = X =

24 / 24 = 2 X 2.000 = 4.00

Battery Specificationssaeled lead acid generic

0CAPACITY OF 220ahPOWER 12 12v

0Peak Amps _______Short Circuit Amp _____

AC Average

Daily Load

InverterEfficiency

DC Average

Daily Load

DC SystemVoltage

Average Amp-hours/Day

AverageAmp-

hours/DayDays of

AutonomyDischarge

LimitBattery AHCapacity

Batteries inParallel

DC SystemVoltage

BatteryVoltage

Batteries in

Series

Batteries in

ParallelTotal

Batteries

Array Sizing Worksheet 1200w PV system

/ / = Panel Specification:195 / 0.9 / 3.1 = 22.10 200w

11.05A

11.8 A short circuit

/ =

22.10 / 11.05 = 2 11.8

/ = X = Total Modules

24 / 23.6 = 6 X 2 = 12

Controller Sizing Worksheet

X X = Controller Array Amps

11.80 X 2 X 1.25 = 29.50 29.50

/ = Controller Load Amps

/ 24 = 0.00 0

Inverter Sizing Worksheet

4,670 24 14010

Average Amp_Hrs

dayBattery

EfficiencyPeak Sun Hrs/Day

Array Peak Amps

Array Peak Amps

Peak Amps

/moduleModules in

Parallel

Module Short Circuit Current

DC System Voltage

Nominal Module Voltage

Modules in Series

Modules in Parallel

Module Short Circuit

CurrentModules in

ParallelSafety Factor

1.25

Array Short Circuit Amps

DC Total Connected

WattsDC System

VoltageMax DC

Load Amps

AC Total Connected Watts

DC System Voltage

Estimated Surge Watts

Controller Specification:

Outback Flexmax 80 150VDC step down charge controllerbatt volts 12,24,36,48,60max pv array 150 v dc

.96 efficiencymax input current 25 amps

array short circuit 80 A DC

inverter specifications Feronious M#PVI5000

max input volts dc 600max short circuit 30 ampsarray power stc 6200w

Wire Sizing Worksheet

A. NEC Requirement (PV Combiner Box to Battery, PV Combiner Box to Controller, Controller to Battery, Battery to AC Load center

X = X 1.25 X 1.25 =

12 X 2 = 12.64 X 1.25 X 1.25 = 37.50 40A #1/0 THWN

B. Voltage Drop Requirments

24 37.50 50 2 #1/0 THWN #1/0 THWN

A. NEC Requirment (Battery to Inverter)

/ / = X 1.25 =

5000 / 0.96 / 24 = 231.00 X 1.25 = 288.75 288.75 #4/0 THwn

B. Voltage Drop Requirements

Isc of Modules

# of Modules

in Parrallel

Total Amps

NEC Required Amps

Amperage

satisfying NEC:

Wire Size From Wire Size Table

System Voltage:

Total Amps:

One Way Distance:

Voltage Drop (%)

Wire Size From

Voltage Drop

Tables

Wire Size needed to meet NEC safety & voltage drop requirements

Inverter Rated Watts

Inverter Efficiency

DC System (lowest

operating) Voltage

Inverter Total Amps

Nec Required Amps

Amperage

satisfying NEC:

Wire Size From Wire Size Table

System Voltage:

Total Amps:

One Way Distance:

Voltage Drop (%)

Wire Size From Voltage Drop Tables

Wire Size needed to meet NEC safety & voltage drop requirements

24 288.75 8 2 #4/0 THWN #4/0THWN

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