Storage numbers
you can defend.
Calculation-grade engineering tools for IPPs. BESS sizing, degradation, augmentation, LCOS — in a browser, with every assumption on the table.
The BESS model lives in someone's Downloads folder.
The reference spreadsheet has broken links in row 847.
The version sent to the board was v14_FINAL_rev3.xlsx.
There is a better way to do this.
Calculation-grade
Every output is correct enough to put in a proposal or present to a board. Not a rough estimate.
Assumptions on the table
Every input is visible and editable. No black box. If the number changes, you can see why.
Runs in a browser
No install. No broken file paths. Share a link; the other person sees the same tool, the same version.
BESS Sizing
Size power and energy for a duty cycle. Every efficiency assumption is visible and editable — change any one of them and the result updates immediately.
Change any assumption. The number updates immediately.
Open the calculator →One suite. The whole asset life.
Four tools that compose into one workflow — from initial sizing through to lifetime economics.
BESS Sizing
Size power and energy for a duty cycle. RTE, DoD, C-rate, aux load in.
Degradation Analysis
Model calendar and cycle fade across the project life.
Augmentation Modelling
Plan when and how much capacity to add to hold guaranteed energy.
LCOS Calculation
Levelised cost of storage — CapEx, augmentation, degradation, all in one number.
Why the number is right.
Methodology is explicit
Every formula is traceable, every assumption is labelled, no hidden constants. The number is only as good as the inputs — and ENFYIQ shows you exactly what those were.
Every input is visible
There are no defaults you cannot see and no coefficients buried in a formula. Open the tool, change an assumption, watch the output update. That is the whole point.
Built for defensibility
The outputs are sized to go into proposals and board presentations. The engineering behind them is the same you would apply building the spreadsheet yourself — done correctly, once.
Built by people who have done this work.