System-centric workflow
Spin up house, starter, or auxiliary banks in seconds. Cable keeps loads, batteries, and chargers scoped to the system you’re tuning.
Cable by VoltPlan
Plan low-voltage DC systems with precision.
Cable brings engineering-grade calculations to iPhone and iPad so you can build reliable DC setups for boats, campervans, and off-grid installations. Dimension wiring, choose the right fuses, and keep every component accounted for while you work on site.
- Dimension cables and fuses with live safety recommendations
- See voltage drop, runtime, and charge time update instantly
- Build a ready-to-check-off Bill of Materials for every system
Built for accurate, on-site DC planning.
Each system keeps loads, batteries, and chargers together while Cable runs live calculations in English, German, Spanish, French, and Dutch.
Loads, batteries, chargers
Add custom hardware or start from the VoltPlan Library. Dial in voltage, power, chemistry, and cable length with friendly controls.
Engineering-grade calculations
See current draw, voltage drop, runtime, and charge time update as you tweak inputs. Swap units between mm2, AWG, meters, and feet in one tap.
Bill of Materials
Build a living BOM as you design. Track cables, fuses, connectors, and mark items complete while you're on the job.
Free for DIY. PRO for installers.
Every download includes local systems, automatic fuse and cable sizing, VoltPlan Library access, and the in-app BOM checklist. Cable PRO adds export, advanced configuration, and compliance-ready tooling built for professional workflows.
Free Edition (DIY)
- Unlimited local systems stored on-device
- Loads, batteries, and chargers with live calculations
- VoltPlan Library templates you can customize per system
- In-app BOM checklist with cables, fuses, and connectors
Cable PRO
- BOM export to PDF and CSV
- Advanced battery, voltage-drop, and derating controls
- Roadmap: standards guidance plus ambient temperature tuning
- Roadmap: VoltPlan.app sync for shared projects
Roadmap highlights: Fuse and cable sizing refinements, UI and accessibility upgrades, interlinked systems, VoltPlan.app sync, AI-assisted suggestions, and install documentation tools.
Visualize every part of your DC system.
Switch between overview, loads, batteries, and chargers to see how updates ripple through your build. Cable recalculates totals on the fly and makes it clear when a component needs attention.
- Overview surfaces runtime, charge time, and BOM summaries
- Loads tab tracks voltage drop, cable sizing, and fuse chips
- Batteries tab aggregates usable capacity and flags mismatches
From concept to commissioned system.
1
Create a system
Start a house, starter, or auxiliary bank. Name it, set the nominal voltage, and let Cable keep loads, batteries, and chargers organized from day one.
2
Add loads, batteries, and chargers
Use VoltPlan Library templates or define custom components. Cable tracks voltage drop, current draw, charge power, and recommended cabling in real time.
3
Validate and execute
Confirm system runtime and charge time, manage a ready-to-use BOM checklist, and prepare for Cable PRO exports when you need documentation.
Confident DC planning, always in your pocket.
Download Cable by VoltPlan on iOS to size wiring, validate batteries and chargers, and keep a living BOM with you on every install. Updates stay local, with Cable PRO offering sync and collaboration options for teams.
Cable is part of the VoltPlan ecosystem, delivering the same trusted calculations that power VoltPlan.app in a mobile-first experience. The roadmap includes shared accounts, cloud sync, and advanced compliance tooling for installers.