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Grid-Tie Energy System Minimum System Size Calculator

How big should your Grid-Intertied home power system be?

This calculator will give you an approximate system wattage so that you can get an idea of cost and components needed for your system.

Please work with experienced Wholesale Solar staff to design a system which fits within your budget and can be expanded as needed.


View our Grid Tie Systems
THE COST OF A GRID TIED SOLAR ELECTRIC SYSTEM: RELEVANT TOPICS

Grid-Tie Energy System Size Calculator
1. How much electricity do you use each month?
Look at your electric bills from the past 6 months (or less) and find the average number of Kilowatt Hours (KwH) per month. Put this number in the space to the right

 KWH/Month
2. What percentage of your house/business power usage will be supplied by solar/wind power from this system? If you want to produce 100% of your electricity, put 100.

 %
3. How many Peak Sun Hours do you get per day? Look at the Solar Map below to find this number.

 Hours
    
Minimum System Size:
Watts

The Minimum System Size is the number of watts per hour your system needs to produce during peak sun hours in order to meet your needs. You can use this number to figure out approximately how many solar panels you will need. Divide the Minimum System Size watts by the wattage of the solar panel you are looking at. For example, it would take 24 Kyocera 130 watt solar panels to produce 3000 watts..... 3000 divided by 130 = 23+ solar panels.

NOTE: These figures are approximate and do not take into account variable efficiency ratings of solar panels and inverters. Please work with experienced Wholesale Solar staff to design a system which fits within your budget and will fills your energy needs.

System Sizing Based on Sun Hours
System Rating
1kW
2kW
3kW
4kW
5kW
6kW
7kW
8kW
10kW
6.5 Sun Hrs
150
300
450
600
750
900
1,050
1,200
1,500
6 Sun Hrs
140
280
420
560
700
840
980
1,120
1,400
5.5 Sun Hrs
130
260
390
520
650
780
910
1,040
1,300
5 Sun Hrs
120
240
360
480
600
720
840
960
1,200
4.5 Sun Hrs
105
210
315
420
525
630
735
840
1,050
4 Sun Hrs
95
190
285
380
475
570
665
760
950
3.5 Sun Hrs
80
160
240
320
400
480
560
640
800


SUN HOURS/DAY ZONE MAP

solar insolation map solar insolation zone 5 Zone 5 solar insolation zone 6 solar insolation zone 4 solar insolation zone two

How Many Sun Hours a Day Do You Get?

Zone 1      6    hours
Zone 2      5.5 hours
Zone 3      5    hours
Zone 4      4.5 hours
Zone 5      4.2 hours
Zone 6      3.5 hours

The figures at the left indicate the average (over the course of the year) amount of insolation (full sun hours) for these zones.  These figures are based on the yearly average; consequently, systems based on these figures will provide more power in summer and less in winter.  Winter figures for daily solar gain may be from 25% to 50% LESS than these average figures.   We do have additional insolation data available for other parts of the world;
e-mail us the location of your solar project.


Grid-Tie Systems
Grid-tie Solar Power
 Enphase Energy Expandable Grid-tie Systems Solar, Wind, Generator, & Grid Hybrid
SunWize Residential Grid-tie Systems Request a Quote for Commercial Grid-tie
Let Wholesale Solar custom design and ship any size of grid-tied home power system.
Call Wholesale Solar: 1 (800) 472-1142

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