Welcome to the SunWize PRE Design Tool. This tool is intended to quickly provide you with an appropriate complete off-grid solar battery system solution, correctly sized for your specific project location and equipment loads. Supported equipment voltages for PRE Systems are 12VDC, 24VDC, and 120VAC.

For devices that run 24/7, SunWize PRE systems will reliably power loads up to 75 Watts continuous, depending on the sun resources of the location.

Loads larger than 75 Watts continuous and equipment voltages outside of those specified above should be directed to our Power Ready systems.

Please complete the Solar Resources and Project Loads sections and then hit the submit button at the bottom of the page to be re-directed to the appropriate power system on our webstore for your application. The submit button is only visible once valid Solar Resource and Load values have been chosen.

Questions? Don't hesitate to call us at (866) 827-6527 or use our Online Chat!

Step 1 - Enter Project Site Info

Use State/City Lookup!I have my own solar data!
Use our State/City lookup for your project site, or input your solar resources directly if you know them!

Sun Resources: kWh/m2/day

Step 2 - Enter Loads Info

I Know My Total LoadsUse The Load Calculator
Use our load calculator to convert your loads into Ah/day, or choose to input your total average daily load value (Ah/day) directly if you know them!
12V24V
Choose your DC battery bank voltage. You may still enter different AC or DC voltages for individual loads.

Guidelines for choosing battery bank voltage:
-if (1) load, use that load voltage for battery bank
-if multiple loads, use largest load voltage
-at least (1) load voltage equal to battery bank voltage

Loads Summary

Total Loads: Ah/day

Total Load in Ah/Day for All Devices

Battery Bank: Volts DC

Micro-climate scenarios, extreme temperatures, site shading, and many other factors may impact system performance. Please confirm the above site and load information is accurate before proceeding.