Power System Design

Designing a reliable onboard power system is not about buying individual components. It is about building a system where every part works together properly.

Solar panels, wind generators, lithium or AGM batteries, inverters, charge controllers, alternators, monitoring equipment, and wiring must be correctly sized, properly matched, and installed as a complete system. One weak link can cause underperformance, shortened battery life, or expensive failures.

At eMarine, we design complete marine and off-grid power systems built around your actual energy usage and operating style.

What We Design

We design integrated systems that may include:

  • Solar charging systems
  • Wind charging systems
  • Lithium (LiFePO4) and AGM battery banks
  • Inverters and inverter/chargers
  • DC-to-DC chargers
  • Alternator upgrades and external regulators
  • Shore power integration
  • Battery monitoring systems
  • System protection and proper cabling

Whether you are upgrading a sailboat, outfitting a trawler, preparing for offshore cruising, or building a high-capacity yacht system, we engineer the system as a whole.

Our Design Process

We start by understanding:

  • Your daily energy consumption
  • Cruising style and climate
  • Generator and engine usage
  • Space and weight limitations
  • Budget and long-term goals

From there, we calculate battery capacity, charging requirements, inverter sizing, cable sizing, and protection requirements. We ensure all components are electrically compatible and configured correctly.

The result is a system that performs reliably and predictably.

Designed by Experienced Marine Technicians

Since 1999, eMarine has supported boat owners with real-world marine power system expertise. Our team works with these systems daily, both in theory and in practice.

We understand how marine environments differ from land-based installations, and we design accordingly.

Design + Products + Support

We do not just sell components. We design the complete system, help you select compatible equipment, and support you before and after purchase.

If you need:

  • A full system design
  • A lithium conversion plan
  • An inverter upgrade
  • Solar expansion
  • Or help troubleshooting an existing setup

We are here to help.