Merlin Power stocks DC-DC converters from KISAE and TBS, including their own M-Power DC-DC Converter. The best option depends on your input and output voltage requirements, and application. The converters will step-down and step-up voltages, and also stabilise the same input output voltages e.g.,

• A marine yacht with a 24V auxiliary battery bank, with 12V radio equipment would use a 24V to 12V DC-DC converter (step-down)
• A campervan with a 12V auxiliary battery bank, with a 24V fridge would use a 12V to 24V DC-DC converter (step-up)
• A police response vehicle with sensitive face recognition technology, requires a specific, stable 12V supply. This would require a 12V to 12V DC-DC converter to give a stabilised output.

When choosing a DC-DC converter, match the input voltage (e.g. 12V from an auxiliary battery bank), output voltage of the load required (e.g. 24V for a fridge), and current of the load required. Merlin Power's team can advise on the right model for your application. Browse the full range.

DC-DC converters and DC-DC converter chargers from brands like KISAE and TBS are engineered for long service life when used within their rated parameters. Merlin Power's market-leading 5-year warranty policy and knowledgeable technical support team ensure that you get the best performance and longevity from your converter. For the full range of charging solutions, see Merlin Power's convert collection.

A DC-DC battery converter gives you the flexibility to run equipment that operates at a different voltage to your battery bank voltage e.g., your battery bank operates 12V, but you want to run a refrigerator that requires a 24V input. A DC-DC converter will allow you to step-up this voltage.

Merlin Power stocks DC-DC chargers from KISAE and TBS, including their own M-Power DC-DC charger. The best option depends on your input and output voltage requirements, charging current, and application. These chargers are ideal for charging second battery banks in vehicles and boats from the vehicle's alternator. 

When choosing a DC-DC charger, match the input voltage (e.g. 12V from a vehicle alternator), output voltage (e.g. 12V or 24V for a secondary battery bank), and charge current to your battery bank capacity. Merlin Power's team can advise on the right model for your vehicle or marine application, including systems with solar integration. Browse the full range.

A DC-DC charger allows you to efficiently charge a secondary battery bank from your vehicle's main battery or alternator, without draining the starter battery. Furthermore, where the charge voltage from the alternator is varied (as with modern Euro-6 compliant vehicles), a DC-DC charger will give the correct charging profile for any battery type (flooded, gel, AGM, Lithium). This will ensure the battery is being charged correctly, maximising battery life.

This makes battery converters essential for campervans, boats, and commercial vehicles where auxiliary power is needed for accessories like refrigeration and microwaves. For higher auxiliary power needs, consider pairing with an inverter/charger combination to cover both DC charging and AC power conversion.