Comparison
Ritwerk and Solar-Planit, side by side.
Solar-Planit is the wholesaler BayWa r.e.’s planning tool, offered at no cost, with structural calculations for its own novotegra mounting system. The designer calculates the loads for systems from several mounting manufacturers.
Updated
What Solar-Planit is
Solar-Planit comes from the wholesaler BayWa r.e. and costs nothing, with no licence or subscription fee. It is aimed at BayWa r.e.’s customers and requires registration. The mounting system is novotegra, BayWa r.e.’s own system.
The base is an image you upload – a drawing, a satellite image or a drone photo – and the roof is drawn in 3D, with several buildings in the same plan. The tool calculates wind and snow loads, ballast and the structural design of the mounting system to Eurocode, and the components can be transferred to BayWa r.e.’s web shop.
Side by side
| Ritwerk | Solar-Planit | |
|---|---|---|
| Runs in | The browser, on a computer and iPad, with no account | The web, with registration |
| Components | Register of 570 products (120 panel models, 415 inverters, 35 batteries) from many manufacturers, with product sheets and datasheets; you can add your own panels | Products from several manufacturers, adapted per country; mounting from novotegra |
| Base data | Aerial imagery from Esri; the outline is traced on the photo and Inner edges raises the roof in 3D | Your own image: drawing, satellite image or drone photo; 3D roof design |
| Shading | The sun’s path every month plus sky view, at nine points per panel; the loss per panel | Not stated |
| Strings | Longest strings within Voc at −25 °C, Vmp at 70 °C and the current per MPPT, with an explanation | Inverter configuration and electrical connection; check against the inverter: not stated |
| Yield data | PVGIS 5.3 from the European Commission, simulated hour by hour | Yield and profitability; the source is not stated |
| Mounting and loads | Snow and wind loads to the Swedish BFS 2024:6 in the designer: zones, fixings and largest c/c spacing for 12 systems from Nordmount, SOLTOP and Weland; ballast in the manufacturer’s software | Wind and snow loads, ballast and structural calculation to Eurocode, for novotegra |
| Battery | Battery sizing tests every size hour by hour; control by hourly price in SE1–SE4 | Storage, consumption profiles and charging stations |
| For the customer | PDF report in A4 at three levels, with a 3D view, strings, yield, shading and economics | Project report with profitability, preliminary price proposal, transfer to the web shop |
| Interface | Swedish, English and German | Not stated; website in German, English and French |
| Price | Designer at no cost; Pro €49 per user per month excl. VAT, with volume discount (pre-order) | At no cost, with no licence or subscription fee |
The details on Solar-Planit come from the vendor’s own pages and were checked on 14 November 2026; the sources are listed at the end of the page. "Not stated" means the detail could not be verified there. The Ritwerk column describes the designer as it is today.
When Solar-Planit is the better fit
When the firm buys its mounting systems and components from BayWa r.e. The structural calculation is done for novotegra from the site’s wind and snow load zones, ballast is part of the calculation, and the materials go straight to the wholesaler’s web shop.
The tool costs the wholesaler’s customers nothing and also covers storage, consumption profiles and charging stations, a profitability calculation and a preliminary price proposal.
When Ritwerk is the better fit
When the mounting system comes from Nordmount, SOLTOP or Weland. The designer calculates the loads to BFS 2024:6 with Eurocode, zone by zone – corner, edge and centre – and gives the fixings per panel and the largest c/c spacing per rail. The calculation is marked to be confirmed in the manufacturer’s own calculation software before ordering, and that is also where the ballast on racks is calculated.
The roof is drawn directly on the aerial photo, and the designer has a shading analysis per panel, a string check against the inverter datasheet and yield from PVGIS 5.3, hour by hour against the customer’s consumption.
Loads per zone
You enter the ground snow load and the reference wind speed for the site. The designer shows the result per roof face – fixings per panel and the largest c/c spacing – and flags any zone where the chosen fixing cannot take the load.
Sources
- Solar-Planit – product page (English) – checked 14 November 2026
- Solar-Planit – home page (German: electrical connection, web shop) – checked 14 November 2026
- Solar-Planit – help centre (image upload) – checked 14 November 2026
- novotegra – system planning (for BayWa r.e. customers, Eurocode) – checked 14 November 2026
- BayWa r.e. Spain – Free engineering tool (registration, Eurocode) – checked 14 November 2026
Questions and answers
Questions and answers
Does Solar-Planit cost anything?
No. BayWa r.e. says the tool is offered at no cost, with no licence or subscription fee. It is aimed at BayWa r.e.’s customers, and registration is required.
Which mounting systems does Solar-Planit calculate?
Solar-Planit calculates the structural design for novotegra, BayWa r.e.’s own mounting system, to Eurocode.
Where do I find the snow load and reference wind speed in Ritwerk?
In Sweden, the ground snow load and the reference wind speed are given as maps in BFS 2024:6, the regulations from Boverket (the Swedish National Board of Housing, Building and Planning). You read off the values for the site and enter them in step 5; the designer shows the site’s coordinates and a link to the regulations.
Does Ritwerk calculate ballast for flat roofs?
No. Snow and wind loads, zones, fixings and c/c spacing are calculated in the designer, racks included. Ballast is calculated in the manufacturer’s software – NM Planner for Nordmount, SOLTOP’s Systemstatik and Weland’s calculation tool.
Read next
- Mounting and loadsSnow and wind loads to BFS 2024:6: wind zones, fixings per panel and the largest c/c spacing per roof face.
- Panels and mounting systems per roof facePanel arrays per roof face, flush, east–west or south-facing, with mounting system and bill of materials.
- String designVoc at −25 °C, Vmp at 70 °C, current per MPPT – and the longest strings the limits allow.
Try it on a real roof.
The designer opens in your browser, with no account. Search for an address and start drawing.