Nomadic Controls D-Series Bidirectional DC-to-DC Converter
D-Series Bidirectional DC-to-DC Converter – Rugged voltage conversion for van, RV, and off-grid power systems. Converts between 48V/12V or 24V/12V configurations with buck and boost operation, intelligent protection, CAN communication support, and IP67-rated durability. Choose D1 – Signal-Control for standard KL15/KL30 signal wiring, or D2 – Direct-Power for a cleaner install path without separate 12V signal wiring.
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Nomadic Controls D-Series Bidirectional DC-to-DC Converter
D Series - Product Details
What is the D Series Converter?
The Nomadic Controls D-Series is a rugged, high-efficiency bidirectional DC-to-DC converter designed for vans, RVs, expedition vehicles, commercial upfits, and off-grid electrical systems. It helps move power between high-voltage battery systems and 12V auxiliary systems with controlled buck and boost operation.
The D-Series is available in two model paths: D1 – Signal-Control and D2 – Direct-Power. The D1 model is designed for systems using the standard KL15/KL30 12V signal-control wiring path. The D2 model is designed for a cleaner direct-power installation and does not require separate KL15/KL30 12V signal wiring for normal operation.
Choose the voltage configuration that matches your system. Select 48V to/from 12V for 48V battery systems, or 24V to/from 12V for 24V battery systems.
Built with intelligent protection logic, CAN communication support, passive aluminum heat dissipation, and an IP67-rated enclosure, the D-Series is designed for demanding mobile power environments where stable output and long-term reliability matter.
Biggest Benefits of the D-Series
The D-Series gives builders and installers a professional-grade way to manage voltage between mixed battery systems. Instead of treating 12V, 24V, and 48V systems as separate islands, the D-Series helps transfer power between them through buck and boost operation.
Key benefits include bidirectional power conversion, high-efficiency voltage regulation, intelligent protection against electrical faults, CAN communication support, and a rugged IP67-rated housing built for mobile environments.
The addition of D2 gives customers a simpler model choice. Choose D1 when your system is designed around signal-control wiring. Choose D2 when you want a cleaner installation path without separate KL15/KL30 12V signal wiring for normal operation.
What About Installation?
The D-Series is a high-amperage DC power component and should be installed by a qualified professional or experienced electrical installer. Proper wire sizing, polarity, circuit protection, mounting location, ventilation, and system design are critical.
The main installation difference between D1 and D2 is the control wiring path. D1 uses the standard KL15/KL30 12V signal-control wiring path. D2 does not require separate KL15/KL30 12V signal wiring for normal operation, which can simplify installs in systems where a separate 12V signal source is not preferred.
Both models require correct high-voltage and low-voltage connections, proper grounding, secure mounting, and verification of output voltage before connecting loads. Always follow the installation manual for the exact model and voltage configuration selected.
How does the D Series compare?
The Nomadic Controls D-Series is not a basic one-way voltage converter. It is a bidirectional DC-to-DC converter built for modern vehicle power systems that may include 12V auxiliary loads, 24V or 48V battery banks, lithium power systems, and advanced upfit electrical layouts.
Compared with generic converters, the D-Series is built around vehicle-friendly durability, intelligent protection logic, CAN communication support, passive heat dissipation, and an IP67-rated enclosure. The D1 model supports the standard signal-control wiring path, while the D2 model adds a direct-power option for cleaner installs without separate KL15/KL30 12V signal wiring for normal operation.
For builders working with mixed-voltage systems, the D-Series gives you a more flexible path than a simple fixed-output converter.
Where Can I Find More DSeries Info?
The NEW D Series Converter
Your power, reimagined: smarter energy management, bidirectional charging, and rock-solid protection—built for real off-grid travel.
Why the D Series?
When your entire rig depends on stable energy, you can’t afford weak voltage control, poor system integration, or wasted power between battery banks. The Nomadic Controls D-Series Bidirectional DC-to-DC Converter is built to manage power between 12V, 24V, and 48V systems with controlled buck and boost operation, intelligent protection, and rugged mobile-ready durability.
Choose D1 – Signal-Control for systems designed around the standard KL15/KL30 12V signal wiring path.
Choose D2 – Direct-Power when you want a cleaner installation path that does not require separate KL15/KL30 12V signal wiring for normal operation.
With a compact body, IP67-rated enclosure, passive aluminum heat dissipation, and CAN communication support, the D-Series gives van builders, RV owners, overlanders, and professional upfitters a stronger way to connect mixed-voltage power systems without relying on a basic one-way converter.
D Series FAQs
What is the Nomadic Controls D-Series?
The D-Series is a bidirectional DC-to-DC converter designed to move power between a high-voltage battery system and a 12V system. Depending on the selected model, it can support 48V to/from 12V or 24V to/from 12V power conversion with buck and boost operation.
What is the difference between D1 and D2?
The main difference is the control wiring. D1 is the Signal-Control model and uses the standard KL15/KL30 12V signal-control wiring path. D2 is the Direct-Power model and does not require separate KL15/KL30 12V signal wiring for normal operation.
Which model should I choose?
Choose D1 – Signal-Control if your system already has the required 12V signal wiring available or your installer is following the standard D1 wiring path. Choose D2 – Direct-Power if you want a cleaner installation path without adding a separate 12V signal wire, especially in high-voltage systems where the converter needs to operate from the power supply being converted.
What voltage configuration do I need?
Choose 48V to/from 12V if your system uses a 48V battery bank and a 12V auxiliary system. Choose 24V to/from 12V if your system uses a 24V battery bank and a 12V auxiliary system. Match the converter to your actual battery system voltage, not just the accessory voltage.
Is the D-Series bidirectional?
Yes. The D-Series supports buck and boost operation. Buck mode steps power down from the high-voltage side to the 12V side. Boost mode steps power up from the 12V side to the high-voltage side when the operating conditions are met.
Does the D-Series automatically decide between buck and boost mode?
The converter uses voltage-based logic to determine operating mode. In general, when the 12V side is low, it can enter buck mode to support the 12V side. When the 12V side is above the required threshold, it can enter boost mode to send power back toward the high-voltage side. Exact behavior depends on the selected model, system voltage, wiring, and operating conditions.
Can this be used as a basic 48V-to-12V converter?
Yes, when the correct 48V/12V configuration is selected. In that setup, the converter can step power down from a 48V battery system to support a 12V system. If you want the simpler wiring path without separate 12V signal wiring, choose the D2 Direct-Power model.
Can this charge a 48V or 24V battery from a 12V system?
Yes, when the selected model and operating conditions support boost mode. Boost mode allows power to move from the 12V side toward the high-voltage side. The full system design still matters, including battery chemistry, BMS behavior, charge sources, circuit protection, and current limits.
Does the D-Series work with lithium batteries?
The D-Series can be used in advanced vehicle power systems, including lithium-based systems, when the selected converter matches the system voltage, and the full electrical design is compatible. Always verify battery voltage range, BMS requirements, charge limits, wire sizing, and protection before installation.
Does this replace a second alternator?
Not by itself. In some builds, a bidirectional DC-to-DC converter can reduce the need for additional charging hardware by moving power between battery banks, but whether it replaces a second alternator depends on the vehicle, battery capacity, alternator output, loads, charging goals, and system design.
Does the D-Series connect to solar panels directly?
No, this should not be treated as a solar charge controller. Solar panels should be managed by a proper solar charge controller or compatible power management system. The D-Series is a DC-to-DC converter for controlled power transfer between battery system voltages.
Does the D-Series include CAN communication?
Yes. The D-Series includes CAN communication support for compatible tools or systems to access voltage, current, and operating status information. CAN wiring requirements may vary by model and use case.
Is the D-Series waterproof?
The converter housing is IP67 rated, which helps protect against dust and water exposure. It still needs to be installed correctly with protected wiring, proper mounting, ventilation, strain relief, and suitable cable routing.
D Series - Power Where It Matters
