String planning for PV systems
Plan PV strings error-free and efficiently. With autarc, you can connect solar modules automatically, easily and flawlessly and check all parameters live. For maximum system performance.

What is string planning?
String planning is the electrical connection of solar modules to strings for connection to inverters. It determines the number of modules, voltage and amperage per module row. Correct string planning maximizes yield and prevents technical problems. Factors such as module type, inverter compatibility, and installation conditions are considered.
How does string planning work with autarc?
autarc automates the entire string planning based on your module assignment. The software calculates optimal string configurations and checks all technical parameters in real time. You will receive immediate feedback on the feasibility and efficiency of your planning. Inverter data is automatically included and individual MPPT settings are taken into account.
- Schritt 1: Module per Drag & Drop verschalten
- Schritt 2: Live-Prüfung aller Parameter
- Schritt 3: MPPT-Optimierung
Benefits of string planning with autarc
- Fehlerfrei planen: Automatische Prüfung verhindert Rechenfehler und technische Probleme.
- Zeit sparen: Keine manuellen Berechnungen mehr – alles wird automatisch optimiert.
- Live-Feedback: Sofortige Rückmeldung zu Spannung, Strom und Wechselrichterkompatibilität.
- Temperatur-Berücksichtigung: Außentemperatur und Installationsart fließen in Berechnung ein
- MPPT-Flexibilität: Individuelle Einstellungen pro Maximum PowerPoint Tracking (MPPT) für optimale Ausnutzung.
- Integrierte Lösung: Direkt verknüpft mit Dachplanung und Angebotserstellung.
Which features are included?
Rates
- All basic features included (dashboard, offers, CRM, AI phone* and more)
- Permanent personal contact
- Email, phone, and live chat support
- Configure with one of our experts
- Weekly webinars with best practices
The core user fee is waived for companies that already have a valid subscription with autarc. *KI phone is charged additionally per minute.
- High-resolution 2D planning principles
(satellite, aerial photos, 2D drone photos, construction plans) - Create 3D models with the photogrammetry service*
- Importing and planning 3D models
- System simulation and profitability calculation
- Offer presentations in your branding
- database with PV modules, inverters and batteries
For companies that already have a valid subscription with autarc, there are different prices. *Photogrammetry service not included in the price.
Sting planning FAQ
How many modules can I connect per string?
The number depends on module voltage and inverter input voltage. autarc automatically calculates the optimal number of modules per string based on technical data.
Does autarc consider different module types in a project?
autarc can manage various module types and creates separate string configurations for each type with individually optimized parameters for maximum efficiency.
Can I use multiple inverters per project?
autarc supports multiple inverters per project. Each inverter is configured separately and string planning is carried out individually for each inverter.
How are temperature effects taken into account in string planning?
autarc automatically calculates temperature coefficients based on outdoor temperature and type of installation. This ensures safe voltage values under all operating conditions.
Is string planning also suitable for small systems?
autarc is suitable for systems of all sizes. From small residential complexes to large commercial projects — the software automatically optimizes every system size.
Can I change the string planning later?
Changes are possible at any time. The software automatically checks the effects on all parameters and immediately shows whether the new configuration is technically feasible.