Hella Marine 2 Group Light Dimmer, For LED & Halogen Lamps, 8-30V DC, PWM, Soft-Start, Low Voltage Battery Protection

Overview

The Hella Marine 998572001 is a two-group light dimmer for 12V and 24V DC systems, with an 8 to 30 V DC input range.

It uses PWM dimming for one or two separate lighting groups, with a jumper that sets one-group mode (both outputs controlled together) or two-group mode (each output controlled independently). Each output is rated for up to 100W on a 12V system or 200W on a 24V system, and when both groups are combined into one the unit supports up to 200W at 12V or 400W at 24V.

Soft-start and internal voltage regulation help protect filament and halogen bulbs when charging voltage climbs above nominal system voltage, and the built-in low-voltage protection shuts the lights off to reduce the chance of deep battery discharge.

Key features

• 8 to 30 V DC input for use on 12V or 24V boats
• Two dimming outputs with jumper-selectable one-group or two-group operation
• Load capacity: 100W per output at 12V (200W total) or 200W per output at 24V (400W total)
• PWM dimming for compatible LED loads and for filament or halogen bulbs
• Soft-start to reduce start-up surge on halogen and help extend bulb life
• Low-voltage cutoff turns lights off below 9V (12V system) or 18V (24V system); re-enables when battery reaches 12V or 24V
• Protection and fusing: 2 x 10A fuses, plus overload and temperature protection
• Compact module size: 99 x 89 x 41 mm; weight 140 g

Installation and setup

Mount the module on a solid surface in a dry, ventilated location. The unit is controlled by momentary, normally-open pulse switches, and multiple switches can be wired in parallel per group when you want control from more than one location.

Select one-group or two-group operation by setting the onboard jumper. In either mode, plan your wiring so the lighting load is divided across the two outputs rather than piling everything onto one circuit.

Electrical and lighting compatibility

This dimmer outputs PWM, so the connected lights need to be compatible with PWM dimming. With LED lighting, that usually means the lamp or driver accepts PWM input; if a fixture has an external driver, confirm the driver supports PWM to avoid flicker or limited dimming range.

For boats that still run filament or halogen bulbs, the soft-start function helps manage inrush current at switch-on, and the internal regulation helps keep the lighting circuit closer to nominal 12V or 24V when the alternator or charger is pushing the system higher.

Use on board

This setup fits well when you want separate control of two zones such as cabin and cockpit, or saloon lighting and berth lighting, while keeping the switching simple with momentary push buttons. It also suits mixed refit jobs where some circuits are LED and others are still bulb-based, as long as the LED fixtures are PWM-dimmable.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

Learn more.

Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

Learn more.

Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

Learn more.