What Does Solar Power Cost?

The price of solar panels has recently fallen sharply. Does lower solar power costs now make it viable? Prices updated in 2014.
Put together a solar power system design here. See the total parts list and costs based on average prices of multiple manufacturers.

Solar Power Capital Costs

Grid connected solar power:

Solar panels + grid inverter + new power meter + cables + installation - government rebates - renewable energy credits

Remote connected solar power:

Solar panels + regulator + batteries + inverter + cables + installation - government rebates - renewable energy credits

roof top solar cell power modules

Grid connected solar power costs

Choose the quatity and size of solar panels required.
Use the table on the right to select a grid inverter large enough for the solar output.
Solar panels are best positioned tilted north in the southern hemisphere
and tilted south in the northern hemisphere.
The pitch angle should match you latitude.
The ideal aspect and pitch is not always possible.
The solar mounts assume the solar panels are directly bolted to the roof.
DC power cables are needed between the solar panels and to the grid inverter.
AC power cables are needed from the grid inverter to the power distribution box.

QuantityDescription
Solar Panel Size
Grid Inverter Size
Import Export Power Meter (electricity provider usually installs)
AC Circuit Breakers
DC Circuit Breakers
Solar Panel Mounting Kits ~ Qty Solar Panels
External UV DC Power Cable (metres)
Internal AC Power Cable (metres)

See text area below.
Total Solar Panel WattsSolar Panel Watts
Solar Panel Qty80160170180190200210230260300
180160170180190200210230260300
2160320340360380400420460520600
3240480510540570600630690780900
432064068072076080084092010401200
540080085090095010001050115013001500
648096010201080114012001260138015601800
7560112011901260133014001470161018202100
8640128013601440152016001680184020802400
9720144015301620171018001890207023402700
10800160017001800190020002100230026003000
For more solar panel specifications see Solar Panel Calculator


Remote connected solar power costs

Choose the quatity and size of solar panels required.
Select a voltage level for the solar panels wiring, regulator, inverter and batteries.
Pick a regulator with sufficient current capacity for the solar panel output.
Battery size will be dependant on expected power input, power output and budget.
Solar Power Calculator , Appliance Energy Calculator
DC UV power cables are needed between the solar panels and regulator.
DC internal cables are needed between the regulator and batteries.
DC internal cables are needed between the batteries and inverter.
A ground cable is needed for the inverter.

QuantityDescription
Solar Panel Size
Regulator Size
AC Circuit Breakers
DC Circuit Breakers
Solar Panel Mounting Kits ~ Qty Solar Panels
Inverter Size
Batteries Size
External UV DC Power Cable (metres)
Internal DC Power Cable (metres)
Ground Cable (metres)
See text area below.
Total Regulator WattsRegulator Amps
Regulator Volts61012152030406080
1272120144180240360480720960
2414424028836048072096014401920
482884805767209601440192028803840


Total Battery kWh Battery (bank) Amp Hours Ah
Battery Volts250400500600750900120014001700230029003500
1234.867.2910.814.4
2469.61214.41821.628.833.640.855.269.684
481219.22428.83643.257.667.281.6110139168

Solar Power Cost Results


See what deductions can be made to the capital cost of a solar power system.
Australian Government Rebates
Renewable Energy Credits
Small Generation Unit Credits Calculator
Each Credit was initially worth $40. At Aug 2011 they were worth $26 each.
REC quantity
REC value

REC Discount

Solar Power Net Cost Calculation

Solar Hardware Costs - RECs = Net Cost

Solar Power Suggestions

  • Check solar panel pricing for different sizes and manufacturers. Dollars per solar watt are currently lowest for 80, 120 and 190 watt solar panels.
  • Look for Maximum Power Point Tracking for grid inverters and regulators to acheive maximum efficiencies across various solar conditions.
  • Battery arrays come in various individual battery voltage formats. Compare maintenance and servicing needs.
  • To further improve solar panels performance consider Solar Tracking Mounting Systems. These system follow the sun through the day.


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