System , payback and design calculators

Here you will find tools to help you design your renewable energy system .

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Power usage calculator 

usage calc

With this handy calculator, you can work out your loads , free download ( Click to download )

Return on investment calculators

lighting payback calc.

This handy calculator gives an indication of the ROI on applied lighting interventions . free download ( Click to download )

Solar ROI view

This handy calculator gives a realistic view of the ROI on grid feed solar installations. free download ( Click to download )

Solar design calculators

grid-tied-solar-system

 

Grid tied solar system calculator 

off-grid-solar-system Off grid solar system calculator 

off-grid pv systemJPG

 

 

Off grid solar calculator with loads

 

 

Wiring design calculators

ohms-law

 

 

 

Line loss calculator

 

 

Wire-Gauge-Chart

 

 

AWG to mm wire calculator

 

 

 

Easy battery bank calculator 

ebc

With this handy calculator, you can work out your battery bank with selected voltages , efficiencies, and batteries , free download ( Click to download )

DISCLAIMER

i Power SA solar system calculators are designed to be a simplistic photovoltaic system design aids. It does not replace the expertise of a professional PV Designer or Engineer nor that of a certified, licensed Electrician.

Please note that optimal orientation of the PV arrays is assumed .

For expert advice , please contact us !