Power Planning Tools

Public-use electrical power planning tools for estimating battery capacity, solar recovery, branch circuit sizing, and related off-grid system assumptions.

Public access: These tools are designed to be usable without logging in. Logged-in builders can save supported planning profiles now, and link profiles to projects.

Want more from Power Planning Tools? Sign in or create an account to save supported planning profiles, return to past work, and access project-linked planning features.

Electrical Builder Tool

Estimate circuit voltage drop, compare copper wire sizes, and review ending voltage for common RV, van, cargo trailer, and off-grid electrical planning.

Publicly usable without login
Logged-in builders can save and manage electrical profiles
Now part of the Power Planning family

Open Electrical Builder Tool

Battery Bank Sizing Tool

Estimate the battery capacity needed for your off-grid electrical plan based on daily energy use, system voltage, battery chemistry assumptions, and autonomy goals.

Publicly usable without login
Manual-entry-first workflow
Logged-in builders can save battery planning profiles

Open Battery Bank Sizing Tool

Solar Sizing Tool

Estimate solar wattage and charging recovery guidance for restoring daily battery use and supporting off-grid energy goals.

Publicly usable without login
Standalone manual-entry workflow
Logged-in builders can save solar planning profiles

Open Solar Sizing Tool

Design approach: Electrical, battery, and solar planning are being developed as separate but related tools. Builders can use them individually or together, without forcing every planning workflow into a single combined calculator.