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Safety components for work-van and campervan power installations

A safe installation needs more than a battery and inverter. This checklist explains the equipment to assess for your vehicle; it is not a universal parts list or a DIY wiring guide. Exact components, ratings and any specialist electrical work must be specified in the written quotation. Not every optional item below is included in the starting package.

Battery protection and 12V distribution

• Secure battery restraints and terminal covers; a battery/BMS rated for the intended loads and charging conditions.
• DC-rated main and branch fuses with covered holders, selected for cable protection and the battery bank’s potential fault current. Lithium installations require adequate fuse breaking capacity; Class T or another suitably rated solution may be specified.
• A correctly rated battery isolator and dedicated high-current inverter supply protection.
• Appropriately sized flexible copper cables, correctly crimped lugs, insulation, cable supports, grommets and abrasion protection.
• Covered positive and negative busbars where needed, and a covered DC fuse board with individually protected small-load circuits. An ordinary blade-fuse board is not the inverter’s high-current supply path.
• Compatible DC–DC charging equipment, charging-circuit protection and battery monitoring. Parallel batteries require manufacturer-approved interconnection and protection.

230V inverter supply and sockets

• An inverter suitable for the intended appliances, continuous load and starting surges.
• For a fixed socket installation, a suitable enclosed distribution unit with double-pole isolation, circuit overcurrent protection and 30mA RCD/RCBO protection selected for the inverter and loads.
• Protective conductors and vehicle bonding appropriate to the designed supply arrangement. Any neutral–earth bonding relay must be specified by the exact inverter’s instructions; do not add an improvised bonding link.
• Secure sockets, suitable AC cabling, strain relief, mechanical protection and separation from DC wiring. Chained extension leads should not form the permanent distribution system.
• Where external mains is fitted: a suitable inlet, input protection and approved changeover arrangement preventing backfeed, with earthing and protection checked in both inverter and mains modes.

A plug-in RCD alone does not establish that an inverter installation is safe. Protection depends on the source configuration. Its test button does not replace installation testing. Renogy models differ: some specifically require an external neutral–earth bonding relay and RCD/RCBO. The exact model manual must be checked.

Mounting, ventilation and handover

Allow the equipment manufacturer’s cooling clearances and protect equipment from water, heat, cargo damage and blocked vents. Battery ventilation requirements depend on battery type. Provide accessible isolation, circuit and load-limit labels, and operating instructions.

Before use, a competent person must inspect and test the completed installation, including protective-conductor continuity, polarity, appropriate insulation checks and instrument verification of protective-device operation in each supply mode. The applicable electrical requirements, test records and any specialist certification must be agreed for the job; this checklist is not a certificate.

For diesel heaters, combustion-air, exhaust, fuel, ducting and electrical requirements need a separate model-specific assessment: see our diesel heater installation service.

References: Victron DC wiring and fuse selection; HSE electrical equipment and RCD guidance; Renogy model-specific protection requirements.

An inverter’s wattage is its output limit, not the amount of energy stored. Appliance starting surges, combined loads and runtime all matter. As an illustration, 2,000W at 12V and 90% efficiency draws about 185A from the battery bank, before other loads. Actual current varies with voltage and efficiency.

We check battery/BMS continuous and surge ratings, charging capacity, cable routes and protection together. Two batteries do not automatically make a suitable bank; matching and parallel connection must follow the battery manufacturer’s requirements.

Browse products by category

• Batteries — LiFePO4 batteries in different capacities; compare dimensions, BMS ratings and cold-weather features.
• Inverters and inverter-chargers — Explore 1,000W, 2,000W and 3,000W options; specify the UK output model and required charging/changeover features.
• Complete power and solar kits — Compare kit contents: batteries, inverter, charging equipment and solar vary between bundles.
• Fixed and flexible solar panels — Choose around roof space, mounting method and charging-system limits.
• Portable solar panels — Portable charging options for stops and trips.
• DC–DC battery chargers — Vehicle charging equipment, including combined solar MPPT options.
• Mains battery chargers — Charging from an appropriate external AC supply.
• Solar charge controllers — MPPT and PWM ranges matched to panels and batteries.
• Monitoring, cables and accessories — Battery monitors, shunts, wiring and installation accessories; compatibility must be checked.
• Protection devices — Protection components selected for the complete electrical design.
• Portable gear — Browse the manufacturer’s current portable range.

Browse the complete Renogy UK product catalogue for every current listing and variant. Manufacturer prices, specifications and availability may change; these links are not an SP88 stock list.

Manufacturer links are reference links, not affiliate links. Manufacturer checkout is separate from an SP88 order.

We compare capacity, current limits, charging compatibility, space and budget. A larger inverter does not increase battery runtime.

Explore Victron Energy and Fogstar, then send us the exact products for assessment.

Free initial WhatsApp photo assessment. An in-person assessment is £100, credited against an installation booked within 30 days. Once the specification and price are agreed, the deposit is £100 for labour-only fitting or 30% for supply and fit. Balance after installation and testing. Dates are confirmed after assessment.