“My batteries keep going flat.”
We can check charging sources, battery health, parasitic loads and system design before recommending replacements.
Electrical diagnosticsHamble · Solent · Southampton
Marine Electrical & Electronics Specialists
We design, install, upgrade and maintain the electrical and electronic systems that keep your boat running.
Find us atUniversal MarinaSarisbury Green · River Hamble · SO31 7ZN
Specialist installationElectronics, electrical systems, diagnostics & refits
Not sure what has failed?Ask about fault finding
Start with what your boat needs
What can we fix or upgrade?
Come to us with a fault, an upgrade plan or a blank sheet. We will assess the boat, explain the options and deliver a properly integrated solution.
POWER
Onboard power systems
- Lithium, inverters & chargers
- Solar & alternator charging
- Battery monitoring & shore power
Navigation systems
- Chartplotters, radar & AIS
- Autopilots & instrument systems
Connected boat systems
- Marine WiFi, 4G & 5G
- Starlink installation
- Remote monitoring & networking
Diagnostics & repair
- Fault finding & rewiring
- AC, DC & charging systems
- Shore power & battery faults
Calibration & commissioning
- Compass, wind & boat speed
- TWA, TWS & TWD setup
- Autopilot tuning & sea trials
Integrated system refits
- Complete electrical upgrades
- Power and electronics integration
- Recommissioning & handover
What can we solve?
Tell us the symptom. We’ll find the right route forward.
You do not need to know which product to buy before you call. Our team starts with the boat, the problem and how you use it.
“My autopilot or instruments are giving poor data.”
We can inspect the network, sensors and setup, then calibrate and commission the system on the water.
Calibration & commissioning“I want more time at anchor.”
We design lithium, solar, inverter and monitoring systems around your real loads and cruising pattern.
Off-grid power“I need several systems upgraded together.”
We coordinate electrical, electronics and refit work so the finished installation works as one joined-up system.
Plan a refitMarine power specialistsMore usable power. Clearer control. Less generator time.
From a targeted charging upgrade to a complete lithium and inverter system, Knight Marine designs around your actual onboard loads-not a generic bundle.
- MultiPlus and Quattro inverter/chargers
- Cerbo GX, GX Touch and VRM remote monitoring
- Lithium battery and battery-management systems
- Solar, alternator and shore-power charging
- System audits, commissioning and fault finding
Calibration & commissioning
Your electronics aren’t finished when they’re installed.
We integrate, calibrate and tune marine electronics on the water so instruments, autopilots, sensors and navigation systems perform as intended.
Boat-speed calibrationCompass calibrationWind calibrationTWA / TWS / TWD setupAutopilot tuningSensor calibrationNMEA integrationSea-trial commissioning
Systems we know and trust
Leading marine technology, properly installed.
We specify, install and support proven equipment around your boat, your cruising and the way you use it.
People you can call again
Specialists who install, explain and support.
Good equipment is only part of the job. Our team considers access, cable routes, protection, integration, usability and future maintenance-then gives you a clear handover.
- Practical advice based on your boat and cruising plans
- Clean, considered installation by a marine team
- Testing, commissioning and an understandable handover
- Ongoing support from our Universal Marina base
From the workshop and the water
See the work, not just the finished result.
Dedicated space for project walk-throughs, system explainers and behind-the-scenes updates from the Knight Marine team.
Navigation systems overview
An equipment explainer from the Knight Marine Tech Day series.
The Oyster Blew refit story
A complete project film showing the people, detail and results behind a major refit.
How we help in four simple steps.
A straightforward, considered process from the first conversation to the final handover.
Assess
We review your boat, existing setup and what you want to improve.
Advise
We recommend the right products, upgrades or maintenance plan.
Install
Our team completes the work carefully, cleanly and professionally.
Support
You receive a clear handover and a team you can call again.
“Knight Marine has fitted a wide range of electronics to our boat. They have provided an absolutely first class and price competitive service.”Andy B · Knight Marine customer
Real boats · real installations
See what we’ve actually built.
Explore documented electronics and refit work already present in the Knight Marine project library-without invented results or anonymous case studies.
Bring your boat to Universal Marina
Come to us for maintenance, repairs and upgrades.
Knight Marine is based at Universal Marina in Sarisbury Green, with direct access from the River Hamble and the Solent.
Visiting through Premier Advantage?
Knight MarineUniversal Marina is part of Premier Marinas. Eligible annual Premier berth holders can request a stay at Universal using their 42 complimentary visitor nights when it is not their home marina. Unlimited free day visits are also available when arriving after 10:00 and departing before 15:00.
Visitor berthing is subject to availability, advance booking and the current Premier Advantage terms.
Check the Premier Advantage termsUnit 5, Universal Marina
Sarisbury Green, Southampton
SO31 7ZN