Tools for BESS industry professionals
Practical tools for people working in or entering utility-scale battery energy storage.
Personal BESS Readiness Assessment
A knowledge test across the eight domains of a utility-scale BESS project. Eight scenario questions, instant feedback, and a readiness map showing where the gaps are.
FreeBESS Candidate Screening Guide
Interview prompts for hiring into utility-scale BESS roles — Solution Manager, Project Manager, Sales/BD. Each comes with what to listen for, plus how the role differs by employer. For recruiters and hiring managers.
FreeBESS Acronyms & Terms — Flashcards
Flip-card study of the BESS nomenclature — PCS, BoP, FAT/SAT, FCR/aFRR and 100+ more — grouped by topic. Built on the BESS glossary; progress saves in your browser.
FreeNIS2 Handover Readiness Checklist
Interactive checklist for asset owners, EPCs, and developers delivering NIS2-ready BESS plants. Covers OT network architecture, access control, handover documentation, supply chain requirements, and incident response.
FreeBESS RTE Calculator — Round Trip Efficiency
Calculate plant-level round-trip efficiency for a utility-scale BESS. Set each equipment efficiency and auxiliary power to see what actually reaches the grid — not just the DC block datasheet number. Includes arbitrage impact.
FreeOLTC Calculator — Transformer Tap Voltages
Size an on-load tap changer from the transformer ratio and the required voltage regulation range. Enter the range and step size — not the number of taps — and see the voltage at every tap position. Built for main power transformers against a ±10% requirement.
Frequently Asked Questions
Are the tools free?
Yes. All tools on learnBESS are free to use — no account or subscription required.
Do I need to create an account?
No. Every tool works directly in your browser with no login needed.
Does my progress save?
For tools that track progress (like the flashcards), your progress saves locally in your browser. Nothing is sent to a server.
Can I use the tools on mobile?
Yes. All tools are fully responsive and work on phone, tablet, and desktop.