Mastervolt Magic 12/12-20 DC Converter [81300400]
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Magic 12/12-20 DC Converter
For The Toughest Tasks
The Mac and Magic DC-DC converters are designed for the toughest conditions for professional, semi-professional and recreational purposes. Even under the most extreme conditions, these DC-DC converters operate faultlessly, giving you round-the-clock output when necessary. The sustainability and technologies that underpin the Mastervolt concept have long been proven in practice. With an MTBF of 280,000 hours at full capacity and 24/7 use, the DC-DC converters are ideal for the toughest tasks and any situation that requires a reliable power supply.
Making The Best Even Better
The reliability and long lifespan of Mastervolt’s DC-DC converters have been established beyond doubt over the past 20 years. While the Mastervolt products have evolved with the latest technological developments, the dimensions and connections have remained the same. As a result it is exceptionally easy to replace one unit with another with only negligible downtime.
Mastervolt Green by Heart
As part of our constant search for eco-friendly and long-lasting solutions, Mastervolt has developed the Green by Heart program. Its impact on the Mac & Magic DC-DC converters include:
- An exceptionally effective use of the consumed input current (cos phi) > 0.98!
- Faster charging of batteries, even with when the input current is limited
- Use of top quality components with a long lifespan
- Savings in weight and space
- Fewer installation materials
MasterBus Compatible
For the DC-DC converters you can use the MasterBus Serial Interface. All you need is a single cable with one connection. Your benefits: Fast and easy installation, plus centralized monitoring, configuration and operation of your system with a MasterView panel.
Programmable via Desktop or Laptop/PC
Remote control the Mac or Magic via your laptop or PC or configure your personal preferences. The device has a communication port and easy installation with a PC-Link and MasterAdjust software.
Energy-Saving Dimmer Function
Many standard light dimmers convert part of the energy to heat and also lose unnecessary energy. The Mastervolt Magic converters regulate the power supply efficiently and without excessive heat build-up, up to 580 watts for optimal safety (multiple Magic converters can be used for multiple lamps).
Parallel Operation
If you have many/heavy power-consuming devices onboard, the parallel use of several units allows capacities of 40, 60 or more Amps. Advanced high-frequency technology with modern microprocessors ensures minimum power loss when switching from 24 to 12 V and vice versa.
Powerful Selling Points:
- Reliable and very stable DC supply
- For 12 and 24 V battery systems
- Parallel switching of multiple units for capacities of 40, 60 or more Amps
- Battery charger and dimmer function
- Adjustable output voltage
- Voltage stabilization for a longer lifespan of halogen lights, etc
- Corrosion-proof aluminium casing
- Shock-proof
- Temperature-powered fan for cooling
- Generates limited heat, so installable almost anywhere
- Fully MasterBus compatible with a MasterBus Serial Interface
Specifications:
- Nominal output voltage: 13.6V
- Output voltage (adjustable with MasterAdjust): 10-15V
- Output voltage dimmer (adjustable with MasterAdjust): 4-13V
- Output voltage stabilization: 2% at extremes of temperatures, load and input
- Output voltage ripple (peak peak): max. 1%
- Max. output power: 300W
- Nominal output power: 300W
- Max. output current: 20A
- Output charge current (3-step mode): 16 A
- Nominal input voltage: 12V
- Input voltage range: 11-16V
- Input voltage range (3-step charge mode): 12-16V
- Lower input set point (adjustable with MasterAdjust): 10V
- Delay lower input set point (adjustable with MasterAdjust): 30 sec.
- Galvanic isolation: yes
- Voltage limited: yes
- Efficiency: > 90% at nom. input voltage, full load; peak 92 %
- Dimmer function: yes, by external momentary switch via fast-on connection, to be activated by DIP switch setting
- Alarm contact: yes (fast-on connector)
- Dimensions, HxWxD: 227 x 154 x 81mm / 8.9" x 6.1" x 3.2"
- Weight: 1.8kg / 4.0lb
- Approvals: CE
- 3-Step charge option: yes (DIP switch settings)
- DC consumption: < 115 mA
- Connections: screw terminals (max. wire size 16 mm² / AWG5)
- Temperature range (ambient temp.): -25 °C to 80 °C, derating > 40 °C -13 °F to 176 °F
- Sound level: < 48 dBA at 1M
- Protection degree: IP21
- Protections: against over load & over temperature
- Cooling: maintenance free vario fans
- MasterBus compatible: yes, in combination with a MasterBus Serial Interface
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
Owner's Manual (pdf)
Shipping Policy
Shipping Policy
Shipping Policy
Effective Date: July 14, 2026
At Roam & Harbor LLC ("Roam & Harbor," "we," "our," or "us"), we are committed to getting your order to you as quickly and efficiently as possible so you can spend more time enjoying your next adventure. Whether you're shopping for marine, RV, camping, or outdoor gear, we're here to make your experience as smooth as possible.
Order Processing
Orders are processed the same business day when placed before our daily order cutoff time. Orders placed after the cutoff, on weekends, or on recognized holidays will be processed on the next business day.
Once your order has been processed, you will receive a shipping confirmation email with tracking information.
Please note that processing times may be extended during holidays, promotional events, or periods of unusually high order volume.
Shipping Methods
We offer the following shipping options:
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Standard Shipping
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Expedited Shipping (additional fee)
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Overnight Shipping (additional fee)
Available shipping methods and estimated delivery times will be displayed during checkout based on your shipping destination.
Shipping Rates
Shipping rates are calculated at checkout based on your order, destination, package dimensions, and the selected shipping method.
From time to time, Roam & Harbor may offer promotional shipping offers, including free shipping on qualifying orders. Any applicable promotions will be clearly communicated on our website and during checkout.
Shipping Carriers
To provide the best delivery experience, we ship through a variety of trusted carriers, including national and regional delivery partners. Carrier selection is determined based on your location, package size, and the shipping service selected at checkout.
International Shipping
Roam & Harbor proudly ships to customers around the world.
Please note that international customers are responsible for all applicable customs duties, import taxes, VAT, brokerage fees, and other charges imposed by their destination country. These fees are not included in your purchase price or shipping charges and must be paid by the recipient upon delivery, where applicable.
International delivery times may vary due to customs processing and local postal services.
Order Tracking
Once your order has shipped, you will receive an email containing your tracking number. Tracking information may take up to 24 hours to become active after your shipment has been processed by the carrier.
Shipping Delays
While we work hard to meet all estimated delivery times, shipping delays may occasionally occur due to weather conditions, carrier disruptions, customs inspections, or other circumstances beyond our control.
Roam & Harbor is not responsible for delays caused by shipping carriers or events outside of our reasonable control. We appreciate your patience and understanding should these situations arise.
Lost, Damaged, or Missing Packages
If your package appears to be lost, damaged during transit, or has not arrived within the expected delivery timeframe, please contact our Customer Support team as soon as possible.
Email: admin@roamandharbor.com
We will work with the shipping carrier to investigate the issue and assist you in resolving it as quickly as possible.
Please note that shipping damage and manufacturer defects are handled differently. If you receive a product that is defective due to a manufacturing issue rather than shipping damage, please contact our Customer Support team immediately. We will review the issue and work with you to determine the appropriate resolution in accordance with our Returns Policy and any applicable manufacturer warranty.
Incorrect Shipping Address
Customers are responsible for providing an accurate shipping address at checkout.
If you notice an error after placing your order, please contact us immediately. While we will do our best to update your order before it ships, we cannot guarantee changes once an order has entered processing or has been handed over to the carrier.
Roam & Harbor is not responsible for orders delivered to an incorrect address provided by the customer.
Questions?
If you have any questions regarding shipping, delivery, or your order status, we're happy to help.
Roam & Harbor LLC
Email: admin@roamandharbor.com
Return & Refund Policy
Return & Refund Policy
Returns & Refund Policy
Effective Date: July 14, 2026
At Roam & Harbor LLC ("Roam & Harbor," "we," "our," or "us"), we want you to shop with confidence. If you're not completely satisfied with your purchase, we're here to help. Please review the following policy to understand our return, refund, and exchange process.
Return Eligibility
Most items may be returned within 30 days of the delivery date.
To qualify for a return, items must:
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Be unused, uninstalled, and in their original condition.
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Include all original packaging, manuals, accessories, tags, and components.
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Be free from signs of wear, misuse, modification, or damage after delivery.
Roam & Harbor reserves the right to refuse returns that do not meet these eligibility requirements.
Non-Returnable Items
The following items are not eligible for return:
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Clearance or final sale items.
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Gift cards.
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Hazardous materials or products classified as hazardous for shipping.
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Opened consumable products.
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Any item identified as non-returnable at the time of purchase.
Return Authorization
Because Roam & Harbor works with multiple fulfillment partners and manufacturers, all returns require prior authorization.
Return instructions and the appropriate return location vary depending on the product purchased. Please contact our Customer Support team before sending any item back.
Returns sent without prior authorization or to an unauthorized address may be refused, returned to the sender, or experience delays in processing.
Return Shipping
For standard returns, customers are responsible for return shipping costs.
We recommend using a trackable shipping service and purchasing shipping insurance, as Roam & Harbor is not responsible for items lost or damaged while being returned.
Damaged, Defective, or Incorrect Items
If your order arrives:
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Damaged during transit,
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Defective due to a manufacturing issue, or
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Different from the item you ordered,
please contact our Customer Support team as soon as possible.
To help us resolve your claim quickly, we may request photographs of the product, packaging, shipping label, or other relevant information.
Once your claim has been reviewed and approved, Roam & Harbor will provide a prepaid return shipping label when a return is required.
Depending on inventory availability and the nature of the issue, we may provide one of the following resolutions:
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A replacement product (subject to availability).
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A full refund to your original payment method.
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Another mutually agreed-upon resolution when appropriate.
Exchanges
Exchanges are available only for products confirmed to be defective.
If a replacement product is unavailable, a full refund will be issued to your original payment method.
Inspection & Refunds
Returned merchandise may be inspected by Roam & Harbor or one of our authorized fulfillment or manufacturer partners before a refund or replacement is approved.
Once your return has been received and approved, refunds will be issued to your original payment method within 14 business days.
Please note that your financial institution may require additional time to post the refund to your account.
Original shipping charges are non-refundable unless the return results from our error or an approved defective, damaged, or incorrectly shipped item.
Refused Deliveries & Incorrect Addresses
Customers are responsible for providing an accurate shipping address at checkout.
Orders returned because of an incorrect address, refused delivery, or failure to accept delivery may be subject to the original shipping charges and any return shipping fees incurred by Roam & Harbor or our fulfillment partners.
Manufacturer Warranties
Many products sold by Roam & Harbor are covered by manufacturer warranties.
Manufacturer warranties are separate from this Returns & Refund Policy and remain subject to the individual manufacturer's terms and conditions.
If your issue occurs outside our 30-day return period but falls within a manufacturer's warranty, our Customer Support team will gladly assist you in identifying the appropriate warranty process whenever possible.
How to Start a Return
To begin a return request, please contact our Customer Support team and provide:
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Your order number.
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The reason for the return.
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Photos of the product, if applicable.
Our team will review your request and provide return authorization along with the appropriate return instructions.
Email: admin@roamandharbor.com
Questions?
If you have any questions regarding returns, refunds, exchanges, or warranty assistance, we're here to help.
Roam & Harbor LLC
Email: admin@roamandharbor.com
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