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Off-Grid Solar Design Tool & Course BETA LAUNCH!

Beta Launch: Founding Member Pricing. $129 locks in lifetime access to all future Digital Design Sunbloc products. Full public launch coming Summer 2025 at $249+.

 

The step-by-step system that helps you design, size, and install professional-grade off-grid solar, even if you've never touched electrical work before.

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   âœ“ Learn design and iterate in the companion spreadsheet to perfect it


   âœ“ Watch the videos and complete the spreadsheet alongside to complete design in hours

 
   âœ“ Ensure that your design complies with all NEC codes and standards


   âœ“ Save hundreds or thousands of dollars cutting out professional installers. 

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About Your Instructor
   
Matthew Wheeler, Professional Solar System Designer
   
   âœ“ 8 years designing and installing solar installation

   âœ“ Off-grid, Grid-tied, Commercial, Utility experience

   âœ“ Developed and standardized an off-grid solution           for Indian Health Services remote cistern projects
   âœ“ Hundreds of successful installations completed
   âœ“ Mechanical Engineer
   

"After yeards designing and teaching about solar installations I created this course & tool to prevent DIYers from wasting thousands on wrong parts and incorrect design. My goal is to give you the same professional tools and calculations I use, without the price tag."

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  • Most DIY solar systems fail because people buy parts first and try to make them work later.

  • This leads to systems that are underpowered, unsafe, unreliable, or overpriced.

  • This course teaches the correct order:

  • Loads → Design → Components → Installation → Commissioning

  • Common failure points:

  • Incorrect component sizing (PV Array, Charge Controller, Inverter, Battery Bank)

  • Incorrect wire sizing (wires burning)

  • Missing protection (wiring, disconnects, grounding, faults)

  • Improper quality control and maintenance process

Outcomes

By the end of this course you will be able to: 

  • Identify loads and calculate true power needs

  • Choose AC or DC based on what you are powering

  • Select an inverter that handles surge and motor loads

  • Commission the system with a safe startup order

  • Choose batteries based on capacity and power delivery

  • Size PV modules correctly (voltage, amperage, wattage)

  • Size wire safely to prevent voltage drop and overheating

  • Place disconnects and over-current protection correctly

  • Maintain the system and plan realistic upgrades

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Who It's For

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Built for Every Off-Grid Senario

This course is designed for DIYers who want to build reliable off-grid or backup solar systems with absolute confidence.

Whether you are designing a system for a camper van, an overland RV, a remote off-grid cabin, or a blue-water sailboat, this guide ensures you get the math right before you spend a dime on hardware.

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MODULES

  • Introduction

  • Safety Fundamentals

  • Codes, Permits, and Inspections

  • DC Solar Installations

  • AC Solar Installations

  • Design Overview

  • Solar Design Prerequisite

  • Load Analysis

  • Battery Design and Selection

  • Inverter Design and Selection

  • PV Array Design and Selection

  • Wire Sizing and Design

  • Overcurrent Protection Devices

  • Conduit Sizing and Design

  • Grounding and Bonding

  • Electrical Enclosures

  • Solar Module Orientation and Mounting

  • System Layout and Component Placement

  • Tools and Materials

  • System Installation Workflow

  • Pre-commissioning Checks

  • System Startup and Commissioning

  • Monitoring, Longevity, Maintenance and Troubleshooting

  • Conclusion

Pricing

Pricing Options:

Beta Course & Design Tool — $129
Includes full course access, spreadsheet and access to all future Sunbloc design tools.
Beta Course, Design Tool, & 1 Hour Design Review — $199

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FAQs

Frequently Asked Questions:

  • Q: Does this course teach AC and DC solar?

    • A: Yes. You will learn what each is best for and how to choose based on your loads.

  • Q: Is this beginner-friendly?

    • A: It is DIY-friendly but assumes you can follow instructions and work safely.

  • Q: Does this include a parts list?

    • A: You will learn how to choose parts correctly for your system.

  • Q: Does this replace permits or electrical code requirements?

    • A: No. Local requirements always apply.

  • Q: How do I access the course?

    • A: After purchase, you will receive member access to the course dashboard.

  • Q: How much money will this save me?​

    • A: Most DIYers spend $4,000-$5,000 on a 3kW off-grid system doing it themselves. 
         Hiring an electrician for the same system costs $12,000-$15,000. This course 
         pays for itself 20× over on your first installation.​

  • Q: What if I have zero electrical experience?​

    • A: Perfect! This course is designed for beginners. We start with the fundamentals 
         and build up step-by-step. If you can follow instructions and use basic tools, 
         you can do this.​

  • Q: How is this different from YouTube videos?​

    • A: YouTube videos are scattered and incomplete—you'll waste hours searching for 
         answers. This course gives you everything in one place: the theory, the calculations 
         (via spreadsheet), the step-by-step process, and the NEC compliance you need for safety.​

  • Q: Do I need special tools?

    • A: You'll need basic electrical tools (multimeter, wire strippers, drill) and 
         hand tools you probably already have. We provide a complete tools list in the course.

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