Two calculator modes
Simple grid-tied PV or advanced off-grid and hybrid battery sizing — offer one or both.
Phaseshift Calculator
Turn website visitors into qualified solar leads.
A white-label solar & energy calculator for WordPress. Visitors size their own system; you get a qualified, itemised lead — fully branded as your own, no code.
2
Calculator modes
51
Appliance presets
4
Languages built in
8
Admin config tabs
The wizard
An estimate visitors actually finish.
Each visitor walks through their real energy use — appliance by appliance, or straight from recent bills — in a guided flow you can reorder for your market. Every answer feeds the sizing math.
Roof & location
Size to the real roof.
Visitors drop a pin on satellite imagery; PVGIS gives exact sun-hours and an optional Google Solar check grades the roof. The system is capped to what fits and offset against any existing panels.
Results & economics
A credible answer, not a ballpark.
Clear tiles show the recommended system, then the money: bill before and after, savings, itemised price and payback. Advanced mode adds a live autonomy slider and save-to-PDF.
- Savings, payback and 10-year net
- CO₂ avoided each year
- Itemised offer with your catalog prices
Lead capture
Every estimate becomes a lead.
Ask for a quote and the full recommendation lands in a CRM inside wp-admin. Filter and search, track new → contacted → won → lost, add notes, and export to CSV.
White-label
Your brand, your market, no code.
Set branding, regions, tariffs, catalog and appliances from the admin — one plugin resold as your own. The calculator ships in four languages with a live switcher, all editable without code.
Everything you need to sell solar online.
Guided estimate wizard
A multi-step flow with a 51-appliance grid, day/night tariffs, and reorderable steps.
Satellite roof mapping
A draggable pin on satellite imagery, with optional Google Solar and PVGIS sun-hours.
Real sizing engine
Inverter, battery bank, array kWp and panel count — plus a roof-fit check.
ROI, payback & CO₂
Annual savings, itemised price, payback and CO₂ avoided — shown to the visitor.
Live, shareable results
Stat tiles, a live battery-autonomy slider, a production chart, and save-to-PDF.
Built-in lead CRM
Leads land in wp-admin with a status pipeline, notes, filters and CSV export.
Branded automatic emails
A confirmation to the customer and a notification to your team, instantly.
White-label, no code
Branding, regions, tariffs, catalog and emails — all from the admin.
Embed & extend
A shortcode or block, plus webhooks, a REST API and GDPR tools.
Multilingual
Speak your customer's language.
The calculator greets each visitor in their own language and switches live between English, Dutch, German and Spanish. Add languages or reword anything from the admin.
Case study
See how it performs in the real world.
We built the Phaseshift Calculator for a solar installer who needed qualified leads, not just clicks. Read the full build story — the brief, the sizing engine, and the results it drove.
Read the build story →Ready to put it on your site?
See it in action, or talk to us about branding it for your business.