Solar Calculator
A modern, user-friendly WordPress plugin designed to promote solar energy, calculate the potential solar power generation at a specific location.
Consider an alternative
Solar Calculator shows warning signs in 2026 — compare the alternatives below before installing. It runs on 90+ sites and was last updated 1 year ago, and scores 34/100 on our health check.
- Small user base (90+ active installs)
- Very few reviews so far
- No update in over a year
- Only tested up to WordPress 6.8 (latest is 7.1)
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Solar Calculator stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| calculator | >100 |
| energy | #54 |
| photovoltaic | #2 |
| pv | #10 |
| solar | #5 |
Version adoption
Share of active sites per release.
About Solar Calculator
From the official readme · v1.1.4Description
A WordPress plugin that helps homeowners, installers, and energy consultants easily calculate the potential solar power production of a specific location
Features include:
– Intuitive, responsive frontend calculator
– Featuring an advanced battery comparison chart and table
– Customizable backend settings (regional defaults, pricing presets etc.)
– Multilingual support (WPML, Polylang, etc.)
– Accurate solar yield estimates based on real data
– Battery and installation cost calculators
– Translation-ready with .po/.mo files (DE, GR, IT, EN, ES, FR)
Ideal for solar companies, energy advisors, and eco-conscious site owners.
Made in Germany – optimized for European conditions.
Developer Info
Plugin structure:
/wp-content/plugins/
└── solarrechner/
├── solarrechner.php ← Main plugin file
├── admin/
├── assets/
├── includes/
├── languages/
└── templates/
└── solarrechner-frontend-i18n.php ← Frontend template with multilingual support
Installation
- Upload the plugin to
/wp-content/plugins/or use the WordPress plugin installer. - Activate the plugin via the ‘Plugins’ menu in WordPress.
- Configure base values under the settings panel and save changes.
- Insert the shortcode
[solar-calculator]into any page or post. - Insert the shortcode
[login_logout_link]were ever you want. - If you want, create a user for maintaining only the backend parameters and give him the role solar_super_user.
Changelog
1.1.4
- Language dependent currency symbols
- curruncy switcher
- some minor bugfixes
1.1.3
- Enhanced language support with fallback to englisch if missed
- updated language files.
Screenshots
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
Best Solar Calculator alternatives
All calculator plugins →
FAQ
Solar Calculator: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 4, 2026
Is Solar Calculator free?
Yes. Solar Calculator is free to download and use from the official WordPress.org plugin directory.
Is Solar Calculator safe to use in 2026?
Solar Calculator shows warning signs in 2026 — compare the alternatives below before installing. It runs on 90+ sites and was last updated 1 year ago, and scores 34/100 on our health check.
How many websites use Solar Calculator?
Solar Calculator is active on 90+ WordPress websites and has been downloaded 1,573 times since it launched in May 2025. It was downloaded 74 times in the last 30 days.
Does Solar Calculator work with WordPress 7.1?
Solar Calculator is officially tested up to WordPress 6.8.10, while the latest release is 7.1.2. It may still work, but try it on a staging site first.
What PHP version does Solar Calculator need?
Solar Calculator requires PHP 7.2 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Solar Calculator last updated?
The latest version, 1.1.4, was released on May 24, 2025 (1 year ago).
Who makes Solar Calculator?
Solar Calculator is developed and maintained by Helmut Burk.
What are the best alternatives to Solar Calculator?
The most popular alternatives to Solar Calculator are Cost Calculator Builder (20K+ installs), Cost Calculator for Contact… (6K+ installs) and Calculator Builder (1K+ installs).
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