Load Calculator

Get the data necessary to design the best system


Why calculate your daily loads?

The daily load calculator is a simple yet informative tool that can show us (and you) critical information about your boat’s energy cycles and how to optimize your systems. These load calculations ultimately dictate solar charging needs, inverter sizing, and the ideal battery bank size & chemistry. The more accurate your data is, the more effective the planning and design process will be, and the more you can enjoy your time on the water.


How to calculate your daily loads?

OPE has created multiple spreadsheets to ease the process of calculating your loads.  You can choose EITHER an Excel spreadsheet or a Google sheet to fill out.  See the links below. If you choose the Google sheet, create a copy and rename it so that you can download it, print it or share it with us if you decide you would like more info. If you choose the Excel sheet, download it and “Enable Editing” so that you can enter your information.

Before you begin, please review the detailed instructions which you can find in the link below.

Additionally, we have provided 2 examples of completed spreadsheets for your review.  See the links below.



Ready to design your system?