Solar calculator with roof planning: From the roof to a sensible system
The solar planner combines the real roof with an understandable system calculation. You draw usable areas, place obstacles and see how panels, storage, self-consumption and costs interact.
In the account for buildings with a known address
Product preview
Solar calculator
What you can do
Key features
Shows official roof areas on an aerial map and classifies the usable areas individually.
Places panels to match the area, orientation and selected module.
Takes chimneys, skylights and other marked obstacles into account.
Uses the common shadow map for relative shadow profiles per roof area.
Forms panels into strings and MPPT groups and pre-tests voltage and current in cold and hot conditions.
Allows you to adjust panel performance, orientation, tilt, losses and electricity price.
Plan a battery storage system with capacity, costs and efficiency.
Shows monthly production, own consumption, grid consumption, self-sufficiency and rough economic efficiency.
Saves several areas and the entire planning of the object.
How it works
Step by step
- 1
Check roof
Check the address and map image. Only draw areas that really belong to the roof.
- 2
Draw usable area
Place the corner points along one side of the roof. Areas can then be moved or deleted.
- 3
Mark obstacles
Draw chimney, skylights and clear safety areas. The panel assignment avoids these areas.
- 4
Check shading
Open the shared shadow map, control nearby buildings and add trees or walls.
- 5
Select modules and memory
Adjust panel dimensions, performance, battery storage and prices to a realistic offer.
- 6
Pre-check strings
Adopt module and inverter data from the data sheets. Wertify groups panels and marks implausible voltage or current ranges.
- 7
Compare result
Read production, self-consumption, self-sufficiency, grid purchase and electrical groups together. More panels are not automatically the best option.
- 8
Have the plan professionally checked
Take the saved variant to a solar company and have the roof, electrics and offer checked on site.
What you need
Requirements
- A building with an exact address in the Wertify account.
- Approximate power consumption or a suitable power forecast.
- For better results, roof pitch, orientation and known obstacles.
Practical guidance
Helpful tips
- Draw multiple roof surfaces separately. This way, different orientations remain understandable.
- For fireplaces and windows, use a safe distance instead of setting the contour too narrowly.
- Do not mix significantly different orientations or shadow profiles on the same MPPT.
- Compare a variant without memory with a realistically large battery.
- Check self-sufficiency and personal consumption together: High production alone says little about the benefits in the house.
Deliberate limits
What this tool does not do
- Satellite images and drawn areas do not replace measurements on the roof.
- Statics, roof condition, fire protection, network connection and approval are not checked.
- Shading is presented as a 2.5D plan with partially estimated heights.
- Yield, costs, subsidies and feed-in tariffs are estimates and are subject to change.
- Panel assignment and string preliminary testing do not constitute electrical implementation planning or installation approval.
Quick answers
Frequently asked questions
Does Wertify automatically detect how many panels fit on my roof?+
The planner covers the usable area you have drawn with the selected panel. The result therefore depends on careful surface area and correct module dimensions.
Can I leave out skylights and chimneys?+
Yes. Obstacles are marked on the map and taken into account when assigning panels.
Does Wertify also plan strings and inverters?+
Wertify creates a technical preliminary test consisting of module voltage, temperature coefficients and inverter limits. The binding design and protection planning remains with a qualified electrician.
Is the calculated yield binding?+
No. It is a reasonable estimate. Shading, weather, assembly and real system losses change the subsequent yield.
How do I find the right battery?+
Compare several capacities with your daily consumption and self-consumption. A very large battery is not automatically more economical.