Every free tool, in one place

Engineering Calculators

20 calculators covering cable sizing, transformer/BESS sizing, fault current, arc-flash, financial estimators, and procurement reference tables.

All 20 Calculators

Voltage drop, ampacity, transformer and BESS sizing, fault current and arc-flash, plus financial estimators and reference tables — citing the NEC and IEEE clauses they follow.

Design & Practice

Hands-on tools for working through a real design, not just looking up a formula.

EE Practice Sandbox

Design a one-line system — transformer, main breaker, feeder, panel loads — and run 5 engineering checks against a live SVG diagram.

POD & Skid Designer

Size a modular power block against a target load and redundancy level (N/N+1/2N) — toggle between an enclosed POD and an open-frame skid.

Rack Elevation Builder

Stack equipment into a 24/42/48U rack and check U-space, circuit power (NEC 80% derated), and weight budgets instantly.

Custom PCB Builder

Instant spec, price, and lead time for a custom PCB fab configuration.

PCB Layout Tool

Place components and route two-layer traces, with a live design check.

Glossary Quiz

Test yourself on energy and industrial equipment terms.

Procurement Tools

For getting a spec or bill of materials ready to issue.

Specification Checklist

A readiness checklist plus copy-paste spec templates for transformers, switchgear, and BESS.

BOM Generator

Component-level bill of materials breakdown for any engineered part.

Part Identification & Lifecycle

For figuring out what a part is, or what replaces it.

Part ID

Photograph a nameplate to help identify a replacement part.

Obsolete / End-of-Life Parts

Discontinued equipment series with OEM-recommended replacement paths.

Reference & Data

Definitions, current market data, and cross-references.