Non Isolated DC DC Module Factories & Exporter serving the Andorra la Vella market

A non-isolated converter shares a common ground reference between the negative input and output terminals. In 90% of automotive, electric utility vehicle, and marine DC distribution networks, all auxiliary systems, sensors, and chassis frames are referenced to the same negative vehicle chassis ground. Choosing a non-isolated converter eliminates unnecessary planar isolation transformers, which boosts electrical efficiency from approximately 88% up to 96%+, cuts internal heat production by over 50%, significantly decreases physical module size, and lowers unit acquisition cost. Isolated converters should strictly be reserved for applications requiring floating grounds, high-voltage battery separation (>100V safety barriers), or sensitive analog telecommunications prone to severe ground loops.

Standard commercial power modules frequently suffer boot failure or ceramic capacitor cracking when exposed to thermal shock and sub-zero temperatures. Eltrum converters utilize automotive-grade components with X7R dielectric MLCCs, ultra-low ESR solid electrolyte capacitors, and hermetic two-part thermally conductive silicone polyurethane potting. This potting material remains flexible at -40°C, absorbing mechanical contractions without shearing delicate SMD solder joints, while acting as a total barrier against condensation during rapid freeze-thaw cycles encountered when vehicles move between heated workshops and snowy pistes.

Because the Principality of Andorra is not part of the EU Customs Union for industrial products (HS Chapter 85 covers DC-DC power modules under 8504.40), imports are subject to Andorran customs clearance at either the French border (Pas de la Casa) or the Spanish border (Farga de Moles). Goods enter under transit documentation (T1) from arrival airports such as Toulouse-Blagnac (TLS) or Barcelona (BCN). Andorra levies its low General Indirect Tax (*Impost General Indirecte - IGI*) of just 4.5% rather than standard EU VAT rates (20-21%). Eltrum provides complete Commercial Invoices with exact HS codes, Certificates of Origin, and packing declarations to ensure seamless processing by your chosen freight broker (*transitari*).

At elevations between 1,000 m (Andorra la Vella) and 2,500 m (Grandvalira ridge lines), atmospheric density decreases by roughly 11% to 25%, which lowers convective air cooling efficacy. Unpotted fan-cooled power supplies must typically be derated by 10% per 1,000 meters above sea level. However, Eltrum non-isolated modules are encased in solid aluminum die-cast housings filled completely with thermal compound (thermal conductivity >1.5 W/m-K). Cooling relies primarily on direct conduction to the vehicle’s metal mounting plate or chassis structure rather than convective airflow, allowing our modules to maintain 100% full rated continuous output current without altitude derating up to 3,000 meters ASL.

Yes. Standard lead-acid alternator outputs (13.8V - 14.2V) cannot fully charge modern lithium iron phosphate (LiFePO4) house battery banks, which require a strict CC/CV profile terminating at 14.6V (for 12V packs) or 29.2V (for 24V packs). Our non-isolated DC-DC battery charger modules integrate an internal microcontroller that samples input and output voltages in real time, implementing a two-stage or three-stage lithium charging profile with auto-restart, over-charge cut-off, and low-input voltage disconnection to protect the primary starter battery from parasitic drainage.

To assist R&D prototyping and fleet repairs, our standard catalog non-isolated buck and boost converters carry a minimal MOQ of just 5 units. For custom output calibrations, specialized connector pigtails (e.g., TE Connectivity, Amphenol, Anderson), or custom private labeling, our MOQ starts at 50 to 100 units. Prototype samples typically dispatch within 3–7 business days, while volume production runs of 500–2,000 units are fulfilled in our Shenzhen factory within 15–20 business days, followed by 4–6 day air-freight transit directly to the Pyrenees.