ProMariner Battery Isolator
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Overview
Battery isolator designed to charge multiple battery banks from a single DC source while keeping banks separate. Supports 6, 12, 24 and 32-volt negative-ground systems with up to 130A capacity.
Key Features
- Up to 130 amps maximum alternator rating
- Operates on 6, 12, 24 & 32 volt negative-ground systems
- Allows one or two devices to charge multiple battery banks without banks being connected (model dependent)
- Current flows in one direction only to prevent backfeeding
- Includes a voltage drop of approximately 0.6V across the isolator
Compatible Applications
- Marine electrical systems with multiple battery banks
- RVs, campers, and off-grid applications needing isolated charging
- Vehicles or equipment with 6–32V negative-ground electrical systems
Product Details
- Rated for 130 amps maximum alternator
- Operates on 6, 12, 24 & 32 volt negative ground systems
- Electrical current able to flow from DC source to batteries in one direction only
- Allows one or two devices (depending on isolation model) to charge multiple battery banks without the banks being connected
- NOTE: All isolators impose a .6 volt drop in the circuit
Parts Desk Insights
Best Use Case: Ideal for boats or RVs that need to isolate battery banks while charging from a single alternator; supports 1–2 devices depending on model.
Common Issues: All isolators introduce a voltage drop (~0.6V). If charging seems reduced, account for the drop in system design. Ensure the chosen model matches the desired number of devices to be charged.
Related Products & Accessories
- Battery Isolators & ACRs - Browse related isolators and ACRs in this category.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.