DIY Off-Grid Power Installation
Your DIY build, backed by experts at every step.
Get a professionally designed off-grid power system, diagrams drawn for your build and engineering support, so you can install with confidence.
Prefer to talk it through first? Talk to a power expert
We’ve got you covered at every step
- ✓System design, done. We engineer the architecture around your loads.
- ✓Matched components. Every part is chosen to work together from day one.
- ✓Answers from our engineers. A full year of expert support, included.
- ✓Confident power-up. Remote or in-person commissioning services available to review & validate your installation during power up.
From system design to power-up, we’re with you.
Build the right system, get it professionally reviewed, and install it with the documentation and support to do it confidently.
Customize your system
Use our configurator or work with our team to build the right bundle for your power needs, batteries, solar, charging sources and options.
Validate with an expert
Our engineering team reviews your configuration to make sure the system you selected matches what you want to power and how you plan to use it.
Get your system + diagrams
Receive your equipment along with professional diagrams, supporting documentation and the resources you need to begin your installation.
Install with support
Work at your own pace with access to experienced support for installation questions, diagram reviews, troubleshooting and project guidance.
Power up with confidence
Get help through startup and beyond with ongoing support, plus remote or in-person commissioning services available to review and validate the finished system.
Everything you need to build it right the first time
Pro-grade hardware, real engineering and a team behind you, in one package. Every stage of your build has what it needs.
The right hardware
A complete off-grid power system sized for what you want to power, built on premium Victron and Epoch components.
Diagrams drawn for your build
Every major connection documented, so you always know what goes where and why.
Resources in one place
Guides, videos and product documentation organized around your project, ready whenever you need them.
Expert support
A full year of email help, scheduled calls, diagram reviews and troubleshooting. Use it at your pace, from first cable to final startup.
Commissioning Services
Remote or in-person commissioning services available providing an expert who will review and validate the installation with you before power up.
Backed for years
Premium components with industry-leading manufacturer warranties, including 11 years on Epoch batteries and 5 years on Victron, and MMH as your dealer of record handling every claim. Ongoing technical support continues beyond year one.
You do the install. We’ve already done the engineering.
Start with a proven system design and a team of experts on call. You get the satisfaction of building it yourself and the confidence of a professional design.
A clear roadmap for your whole build
Your documentation shows how your system comes together, connection by connection, with room to expand where the design supports it. You always know the next step.
- ✓Drawn specifically for your bundle
- ✓Every major connection and its purpose documented
- ✓Expansion paths shown where the architecture supports them
- ✓Ready to hand to your electrician or RV tech
Your support team builds these systems every day
When you call with a question, you reach the MobileMustHave and Off-Grid Power Systems team that designs, installs and lives on these systems. You get real-world answers from people who have done it.
Whole-system expertise
Inverters, charging, monitoring and distribution designed to work as one system, with authorized Victron expertise behind every recommendation.
Years of off-grid installs behind the advice
Every answer is grounded in systems our team has built, wired and commissioned.
Built for mobile environments
Designed for RV, van, marine and overland builds, where vibration, heat and tight spaces are part of daily life.
Here after the sale
Warranty claims and service questions go straight to the team that built your system.
Professional installation experience
Your DIY system uses the same architecture Off-Grid Power Systems installs professionally in Delaware, Ohio.
Support from Off-Grid Power Systems
Diagram reviews, troubleshooting and commissioning come from the same pros who handle our professional installs.
Built it yourself? Add an expert review before power-up.
Remote or in-person commissioning services are available for added peace of mind. An expert reviews the installation with you, validates every setting and walks through startup, either remotely or at our Delaware, Ohio facility.
- ✓ Remote or in-person review of the completed install
- ✓ Configuration and settings validated
- ✓ Assisted startup with an engineer
- ✓ Valid for 90 days from purchase
- ✓ Pro-level confidence on a system you built yourself
Answers before you build
Do I need to be an electrician?
What you need is comfort with 12V and 24V DC wiring, torque specs, fusing and careful work around a lithium battery bank. If those skills are new to you, commissioning or professional installation gives you the right level of help, and we will point you to the path that fits before you start.
What experience should I have?
DIY customers who do well have wired accessories, run and terminated heavy cable, and can follow a documented electrical design step by step. Comfort with basic tools, a torque wrench and a multimeter is the core skill set.
What diagrams are included?
You receive the engineering documentation for the bundle you bought, showing how the core system is intended to come together and the major connections between components, plus supported expansion paths where they apply.
What support is included?
Support hours are good for one year from purchase. Spend them on email questions, scheduled calls, wiring diagram review, troubleshooting and installation guidance, at whatever pace your project actually moves. If you start the install six months after the system arrives, support is still there.
What happens if I run into a problem?
You contact support and we work it with you. Most issues are settings, sequencing or a connection that needs to match the diagram. If it turns into something bigger, we talk about commissioning or having our team finish the install.
Are all cables included?
Wiring bundles are part of the configurator and each one lists exactly what is in it on its own product page, so you can read the contents before you buy. Vehicle-specific runs, lengths and pass-throughs depend on your rig, so support can confirm whether your build needs anything extra.
Can my local installer use the diagrams?
Yes, and plenty of customers buy this way. You supply the designed system and documentation, your electrician or RV technician does the install, and our support team answers diagram questions throughout the project.
Can MMH finish the installation for me?
In most cases, yes. Talk to us whenever you want a hand and we will lay out the options, including commissioning or a professional install of the remaining work.
Can I have the system inspected before turning it on?
Yes. Remote or in-person commissioning services are available. An expert reviews the installation, validates the configuration and assists with startup, either remotely or at our Delaware, Ohio facility. Commissioning is valid for 90 days from purchase, so schedule it with your install timeline in mind.
What warranty support do I receive?
Every system is built on premium components with industry-leading manufacturer warranties, including 11 years on Epoch batteries and 5 years on Victron equipment. We remain the dealer of record on everything we sold you, so claims come through us and we handle them for you. Ongoing technical support continues after your first year.
You do the installation. We handle the hard parts.
Configure your system and see exactly what you get, from hardware to support, before you check out.