Marine Electrician in Portsmouth
Boat electrical work across Portsmouth Harbour, from Gunwharf Quays to Haslar and Port Solent.
Electrical work for Portsmouth Harbour boat owners
Portsmouth Harbour runs from the historic dockyard past Gunwharf Quays out to the harbour mouth, with Haslar Marina sitting on the Gosport side near the old submarine base. Port Solent, further up the harbour behind a lock gate, gives sheltered berthing away from the tidal flow that runs hard through the main channel. The mix of naval, commercial and leisure traffic means boats here are exposed to constant wash, which is worth bearing in mind when planning electrical installations.
Portsmouth Harbour is one of the busiest stretches of water on the South Coast, with naval traffic, the Gosport ferry and leisure boats all sharing the same tight channel. Boats kept here take a battering from wash and tidal flow, which puts extra strain on battery mounts, wiring runs and bilge pump circuits. Southern Yacht Electrics works on vessels moored at Gunwharf Quays, Port Solent and Haslar Marina, dealing with everything from a failed navigation light to a full rewire ahead of survey. We travel from our Shoreham base to Portsmouth as part of our regular coverage of the Solent.
Because the harbour entrance is narrow and busy, many owners here value working nav lights and a reliable engine start battery above almost anything else, and that is usually where we start when a boat comes in for a look.
Whether your boat sits on a swinging mooring off Gosport or a berth inside Port Solent's lock, we can get to it and carry out the work needed without you having to bring the boat elsewhere.
Fault finding on harbour moorings
A boat moved around by wash and tide will loosen crimped connections and chafe cable runs faster than one in a still marina. We trace intermittent faults methodically, checking earth returns, fuse panels and connection points rather than guessing at a single component. Most call-outs in Portsmouth relate to navigation lights, bilge pumps or charging systems that have worked loose over a season of movement.
We carry test equipment suited to 12V and 24V systems so we can isolate a fault on board rather than removing parts to test them elsewhere.
Battery and charging systems
Boats based at Haslar or Port Solent often run longer between visits than those in a home marina, so a charging system that keeps batteries topped up matters. We fit and service battery chargers, alternators and battery monitors, and can advise on battery bank sizing for boats that spend time on a mooring rather than plugged into shore power.
Navigation and deck lighting
Given the volume of shipping using Portsmouth Harbour, working nav lights are not optional. We replace failed units, fit LED conversions that draw less from the battery, and check wiring runs through the deck and pulpit where corrosion often starts.
Shore power and consumer units
Boats on serviced berths at Port Solent and Gunwharf Quays rely on shore power connections that need to be wired correctly and protected properly. We check and replace galvanic isolators, shore power inlets and onboard consumer units to keep the system safe.
Working around ferry and naval traffic
The Gosport chain ferry and regular naval vessel movements mean boats crossing or mooring in the main channel deal with sharp, repeated wash that a berth further up a quieter river would rarely see. This constant motion works connections loose at the back of instrument panels and behind switchboards, often in places an owner would not think to check. When we are called to a Portsmouth boat with an intermittent fault, we usually start by opening up panel backs and tracing connections that have been shaken over months of wash rather than replacing whole units.
Boats kept on drying moorings towards Fareham Creek at the top of the harbour see additional wetting of low-level wiring, which we check as part of a full inspection.
Frequently asked questions
Do you cover boats on Fareham Creek at the top of the harbour?
Yes, we travel to moorings and pontoons on Fareham Creek as well as the main harbour marinas and moorings around Gosport.
Do you cover boats moored on the Gosport side of the harbour?
Yes, we work on boats at Haslar Marina and on swinging moorings around Gosport as well as on the Portsmouth side of the harbour.
Can you get through the lock gate into Port Solent?
We plan visits around the lock gate opening times at Port Solent and factor that into scheduling when we arrange a visit.
What causes navigation lights to fail on harbour moorings?
Corrosion in the wiring where it passes through deck fittings, plus loosened connections from constant wash, are the most common causes we find in Portsmouth.
Do you work on boats that are hauled out at a Portsmouth yard?
Yes, we can carry out electrical work while a boat is ashore as well as afloat.
Get in touch about your Portsmouth Harbour boat
Tell us where your boat is berthed and what electrical issue you're dealing with.
Southern Yacht Electrics carries out marine electrical work across Portsmouth Harbour, including Gunwharf Quays, Port Solent and Haslar Marina, from fault finding to full electrical installations.