Designing a reliable mobile power system requires more than just adding solar panels to the roof. Every RV and vehicle has different loads, usage patterns, space constraints, and charging sources. We design complete, properly engineered solar and electrical systems that deliver dependable off-grid power without oversizing, undersizing, or component mismatch.

Whether you are upgrading to lithium, building out a camper van, or redesigning an existing RV electrical system, we create a system that works as a cohesive whole.

What We Design

We engineer complete mobile power systems, including:

  • Solar array sizing and layout optimization
  • MPPT controller selection and allocation
  • Lithium battery bank sizing and configuration
  • Inverter and inverter-charger selection
  • Shore power and generator integration
  • Alternator charging strategies (DC-DC, external regulators)
  • 12V and 24V DC distribution systems
  • AC load planning and subpanel design
  • System monitoring and energy management

Every component is selected to match your actual energy usage, not generic rules of thumb.

Designed Around Your Real Energy Usage

Many RV solar systems are built using guesswork. We start with real numbers.

We analyze:

  • Daily amp-hour and watt-hour consumption
  • High-load appliances like air conditioning, induction cooktops, or water heaters
  • Charging sources including solar, alternator, shore, and generator
  • Shading considerations and roof layout constraints
  • Travel style and time spent off-grid

The result is a properly balanced system that avoids voltage drop issues, premature battery wear, nuisance inverter shutdowns, and chronic power shortages.

Lithium Upgrades and System Retrofits

If you already have an RV electrical system but want more capacity or performance, we design retrofit solutions including:

  • Lead-acid to lithium conversions
  • Inverter upgrades for higher AC loads
  • Solar expansion planning
  • Battery bank reconfiguration
  • Charging system redesign to support lithium safely

Lithium upgrades require proper charging profiles, wiring review, and system protection. We ensure compatibility across the entire system.

Custom Design Documentation

Our design packages can include:

  • System block diagrams
  • Component lists with exact part numbers
  • Battery bank configuration drawings
  • Solar string layout and controller allocation
  • Wire sizing recommendations
  • Protection and breaker guidance
  • Installation notes and integration considerations

This gives you or your installer a clear, structured plan to follow.

Why Work With eMarine

We have decades of experience designing marine and mobile energy systems. The same principles that apply to offshore yachts apply to mobile RV systems: redundancy, safety, efficiency, and correct component integration.

We focus on performance, longevity, and real-world usability, not marketing wattage numbers.

Start Your RV Power System Design

If you are planning a new build or upgrading an existing system, contact us to discuss your goals, loads, and budget. We will design a system tailored to your vehicle and how you actually travel.

Reliable off-grid power starts with proper design.