Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank
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Estimated Delivery:Sep 01 - Sep 05
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Free Shipping: On all orders over $150
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Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank
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Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank
The Mastervolt Battery Mate 2503 IG Isolator offers efficient simultaneous charging tailored for marine and automotive applications. This advanced isolator is designed to work seamlessly with any alternator or battery charger, making it ideal for both new installations and upgrades.
Key Features:
- Advanced Electronic Technology: Utilizes mosfets (transistors) to ensure consistent voltage levels across multiple battery banks, outperforming conventional diode splitters.
- Minimal Voltage Loss: Achieves fast and complete battery charging without the need for additional alternator adjustments, enhancing overall system efficiency.
- Easy Installation: Designed for simple DIN rail mounting, making setup straightforward and convenient for any technician.
Ideal for boat owners, RV enthusiasts, and automotive applications, this product is supported by a commitment to quality and performance, ensuring your batteries charge effectively and reliably. Don't compromise on battery performance—choose the Mastervolt Battery Mate 2503 IG Isolator for peace of mind on the road or water!

The Battery Mate is the ultimate solution for charging several batteries simultaneously and is compatible with any type of alternator/battery charger, in both existing and new systems. As the voltage loss between the alternator and battery is negligible, the Battery Mate performs far better than conventional battery isolators. This ensures fast and complete charging of your batteries without having to make additional adjustments to the alternator.
While battery isolators are conventional diode splitters, the Battery Mate's technology is electronic and includes mosfets (transistors). Its components compensate for variations in voltage and ensure that charging continues at the right voltage level, even with several battery banks. The input side on the Battery Mate is connected to the alternator and/or battery charger, while two batteries are connected to the output side. The Battery Mate is easy to install on a DIN rail (industry standard).The Mastervolt Battery Mate can be used in any application even if the standard alternator need external excitation or voltage sensing. In this case the additional IG contact can be connected.
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.
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Carriers
We ship all orders via UPS Ground or FedEx Ground, depending on availability and destination.
Shipping Rates
- Orders under $150: Flat shipping rate of $15
- Orders $150 and above: Free shipping
Note: A handling fee of $7.50 may apply to certain items. If applicable, it will be clearly stated during checkout.
Order Processing
- Orders placed before 12:00 PM ET (Monday–Friday): Processed the same business day
- Orders placed after 12:00 PM ET or on weekends/holidays: Processed the next business day
Delivery Time
All orders are delivered within 3–7 business days from the date of shipment, depending on your location.
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Discover more in our FAQ
How long does it take to process an order?
All orders are processed the same business day if placed before 12 PM EST. Orders placed after 12 PM EST are processed the following business day.
Do you ship internationally?
No! Currently we are only supporting shipments to contiguous United States. We do not ship to PO Boxes or Internationally.
What is your return policy?
No Returns
Due to the nature of our products and our commitment to ensuring the highest quality standards, we do not accept any returns under any circumstances.
No Refunds
We do not offer refunds for any reason, including but not limited to:
- Change of mind
- Incorrect size or style ordered
- Delayed shipping
- Product dissatisfaction
Please refer to our Refund Policy
What are your sizing options?
We have a size chart displayed on most products to reflect the sizing as accurate as possible. Please review the size chart and ensure you are leveraging the closest size possible.
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Why You'll Love Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank
Premium Quality
Mastervolt is known for exceptional quality and attention to detail in every product.
Fast Shipping
Fast and reliable shipping to get your Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank to you quickly.
Satisfaction Guarantee
Backed by our comprehensive warranty for complete peace of mind.
Expert Support
Our dedicated support team is here to help with any questions about Mastervolt Battery Mate 2503 IG Isolator - 200 Amp, 3 Bank.