DIY Tips & Tricks

Solar Calculator

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On 24/02/2025
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Table of Contents

Overview of the Solar Calculator

Our Solar Calculator is a dedicated module within the Evo Outdoor Power System Calculator. It not only estimates the daily energy output of your solar array but also provides a compatibility check for your solar controller. By combining essential inputs such as panel wattage, number of panels, and peak sun hours, the tool gives you a clear picture of your system’s potential – all at no cost.

Key Inputs & Their Functions

The tool is simple to use, guiding you through several key inputs:

  • Solar Panel Wattage (W): Input the rated wattage of a single panel. This figure is the basis of the energy estimate when multiplied by the number of panels and the peak sun hours.
  • Panel Voltage (V) [Optional]: If known, this helps calculate the panel’s current output, offering deeper insight into your system’s performance.
  • Panel Current (A) [Optional]: Directly entering the current output allows for a more precise calculation of the overall current generated by your array.
  • Number of Panels: Specify how many panels you plan to install. This scales the energy production estimate from a single panel to your entire array.
  • Peak Sun Hours per Day: Enter the average number of full sun hours your location receives. This input adjusts the output to account for local weather and seasonal changes.

How the Calculation Works

The Solar Calculator uses a straightforward formula to estimate your daily energy production:

Total Daily Production (Wh) = Panel Wattage × Number of Panels × Peak Sun Hours

This calculation provides an estimate in watt-hours (Wh) – the total energy your solar array is expected to produce each day. This metric is essential for determining if your solar setup will sufficiently offset your daily energy consumption.

Optional Solar Controller Compatibility Check

For added peace of mind, the calculator offers an optional solar controller compatibility feature. When you opt in:

  • You choose the controller type – either MPPT (more efficient and capable of handling higher currents) or PWM.
  • You enter the controller’s rated current (A) and voltage (V). The calculator then derives the total current output from your panels and compares it with the controller’s specifications.
  • If the calculated panel current exceeds the controller’s capacity, the tool issues a warning, prompting you to consider a higher-rated controller or adjust your array size.

Benefits & Recommendations

The Solar Calculator is more than just a simple estimator – it’s a comprehensive guide that supports you throughout your solar installation journey:

  • Optimised Solar Array: Accurately gauge your daily energy production to ensure your system meets your energy needs.
  • Seamless Integration: Use the results to align your solar production with overall energy consumption, whether for home use or your mobile van life setup.
  • User-Friendly Guidance: If any key input is missing or seems off, the tool provides actionable suggestions to get you back on track.
  • Proactive Compatibility Check: Avoid potential issues by ensuring your solar controller can handle the total panel current, safeguarding your investment and system longevity.

Get Started Today

Empower your renewable energy journey with our free Solar Calculator. It’s an essential tool for anyone looking to design a reliable, efficient solar power system – whether for a DIY van life build, a camper van conversion, or a residential setup.

Try the Free Solar Calculator Now

Plus, enjoy free professional installation on orders of £1400 or more* – making your transition to sustainable living both seamless and cost-effective. (*Terms and conditions apply.)