Now live — free to start

Site power.
Planned before
the job starts.

Loadout sizes your BESS, builds your programme, and generates a client-ready proposal — in minutes.

Start Planning Free → Watch how it works →

The problem

Site power is still
being done in spreadsheets.

Joule lets construction teams test different build scenarios so they can understand cost, logistics, and programme impacts before work begins.

📋

Quotes take too long

Sizing a generator vs BESS hire manually eats hours. You need the number in minutes, not days.

🗺️

Site plans live in someone's head

Cable routes, DB positions, load distribution. Passed around as sketches or never documented at all.

📞

Fleet visibility is a phone call

Where's the BESS? When does the generator come back? Nobody knows until someone asks.

💸

Oversizing costs real money

Hire a 500kVA generator for a 200kVA job and you've wasted thousands. The data was there. Nobody looked at it.

Plan Smarter
in Three Steps.

From first estimate to final handover — Joule gives your team the data to plan with confidence, not gut feel.

① Estimate

Know your numbers
before you quote.

Input your plant list: cranes, hoists, welfare, tools. Loadout calculates peak demand, week-by-week BESS requirements, and a full cost comparison against diesel in seconds.

  • Quick Calc for instant generator vs BESS comparison
  • Program view — week-by-week demand against your mains limit
  • Scoped BESS hire — only recommend BESS for weeks you actually need it
  • Real fuel costs, CO₂, and total project spend side by side
Try it free →
Loadout — Quick Calc
— 400A mains limit (221kW)
Peak demand 360 kW
Generator cost £48,200
BESS hire (5 wks) £9,400 Save £38,800
② Plan

Build your site layout.
In minutes.

Deploy is an interactive site plan builder built for electrical contractors. Place DBs, run cables, auto-size everything. Share a PDF that goes straight into the tender pack.

  • Drag-and-drop site layout with real-scale calibration
  • Auto cable sizing to BS 7671 with voltage drop checks
  • Source capacity RAG — instant overload flagging
  • Export a professional PDF with cable schedule and BOM
Try it free →
Deploy — Site Plan
⚡ 400A
🔋 BESS
DB1
DB2
🏗 Crane
🔌 Loads
35mm² · 42m · £678
③ Execute

Track your fleet.
From yard to site.

Mobilise gives you real-time visibility of every unit: what's on hire, what's available, and what's coming back. No spreadsheets. No phone calls. No surprises.

  • Live fleet status across all active deployments
  • Drag-and-drop hire scheduling with Gantt timeline
  • Tentative allocations — match units to prospective projects
  • PDF hire reports and fleet utilisation at a glance
Try it free →
Mobilise — Fleet View
Active Fleet
Unit 001 — 200kWh BESS On hire
Unit 002 — 400kWh BESS On hire
Unit 003 — 200kWh BESS Available
Unit 004 — 200kWh BESS 📌 Tentative
Fleet utilisation 75% on hire

Free tool — no sign-up needed

Is a BESS cheaper than
your generator?

Enter your hire rates, demand, and fuel costs. Get a side-by-side cost breakdown and CO₂ saving in seconds — no email required.

Try the free calculator →

Power planning that
actually works.

Size your BESS, build your programme, and generate a client-ready proposal — all in one place. Free to start, no credit card required.

Launch Loadout Free →