One spreadsheet to track your budget, calculate solar requirements, monitor weight limits, and organize your entire build. Used by builders in all 50 states.
Input your appliances - get instant battery bank size (Ah), solar wattage needed, and inverter requirements. No engineering degree required.
Track every component against your van's GVWR. Stay legal and safe. Get alerts before you exceed limits.
Monitor planned vs. actual spending per category. See variance and get alerts before you blow your budget.
Battery Bank (LiFePO4)
Solar Panels
Inverter
Dashboard • Timeline • Electrical • Water • Weight • Budget • Inventory • Journal • Van Specs
Demolition → Insulation → Framing → Electrical → Plumbing → Solar → Finishing
Tank capacities • Pump flow rates • Filtration • Grey/Black water monitoring
Track what you bought • Reorder alerts • Supplier links • Cost tracking
30-day money-back guarantee
Includes Basic + Pro features + Notion version
Complete system • Instant access
Premium support • 1-on-1 consultation
"This spreadsheet saved my build. The electrical calculator alone is worth 10x the price. I would have undersized my battery bank without it."
"Being a first-time builder, I was overwhelmed. This tracker broke everything into phases and kept me on track. Finished in 4 months!"
"The weight monitor saved me from being overweight. I was 300lbs over GVWR before I realized. Reconfigured and now I'm legal and safe."
First-time builder Tom used the calculator to right-size his system. Instead of guessing and over-buying, he got exactly what he needed.
Initial guess: 400Ah battery, 600W solar
Calculator recommendation: 200Ah battery, 400W solar
Savings: $2,300 on unnecessary equipment
Saved on first build
Not at all! We've designed it to be user-friendly. Just enter your numbers in the highlighted cells, and everything calculates automatically. Plus we include video tutorials.
Yes! The tracker works for any van - Sprinter, Transit, ProMaster, school buses, and more. The Pro version includes model-specific layout templates.
You get both Google Sheets (cloud-based) and Excel (.xlsx) versions. The Pro version also includes a Notion template. All are instantly downloadable.
Yes! Google Sheets works great on mobile devices. You can check your budget or add items right from your phone while at the hardware store.
Our electrical calculator uses industry-standard formulas. However, always consult with a professional for final system design. We provide disclaimers and safety notes.
We offer a 30-day money-back guarantee. If you're not happy for any reason, email us and we'll refund your purchase - no questions asked.