Sierra International 186855 Battery Isolator 2 Battery 75 Amp Review

Let’s Dive into Sierra International 186855 Battery Isolator 2 Battery 75 Amp

The Sierra International 186855 Battery Isolator 2 Battery 75 Amp promises a simple and effective way to manage power distribution in boats, RVs, and other dual-battery systems. Manufactured by Sierra International, this isolator allows for charging two batteries simultaneously from a single alternator, while preventing them from discharging into each other. This is crucial for maintaining starting power and dedicated auxiliary battery power, ensuring reliability when off-grid or at sea.

My journey to finding this isolator began with a frustrating problem on my fishing boat. I was constantly worried about draining my starting battery while running accessories like fish finders and livewell pumps, leaving me stranded more than once. I needed a reliable solution that didn’t require constant monitoring or manual switching between batteries.

Upon unboxing, the Sierra International 186855 Battery Isolator felt solid and well-constructed. The terminals were clearly labeled, and the unit itself had a reassuring heft that suggested quality components inside. Compared to simpler manual switches, it seemed like a more sophisticated and hands-off solution.

I considered other battery isolators, including some with higher amperage ratings and electronic features. Ultimately, I chose the Sierra International 186855 Battery Isolator for its simplicity, proven technology, and reputation for reliability. Its 75-amp rating seemed adequate for my needs, and I preferred the straightforward design over more complex electronic options.

Initially, I was excited to install the Sierra International 186855 Battery Isolator and eliminate my battery anxiety. While the concept was appealing, I was also cautiously optimistic, hoping the reality would live up to the promise.

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Real-World Testing: Putting Sierra International 186855 Battery Isolator 2 Battery 75 Amp to the Test

First Use Experience

My first test of the Sierra International 186855 Battery Isolator was during a weekend fishing trip to a remote lake. Installation was straightforward, following the included instructions and utilizing basic wiring tools. The isolator was mounted in the boat’s battery compartment, and wiring was connected to the starting battery, auxiliary battery, and alternator.

The isolator performed flawlessly throughout the weekend, automatically charging both batteries as the engine ran. I could run my fish finder, GPS, and livewell without any fear of draining the starting battery. I also noticed a significantly faster charging time for the auxiliary battery compared to my previous setup.

The weather during the trip was varied, with periods of heavy rain and intense sun. The Sierra International 186855 Battery Isolator remained unaffected by the moisture and temperature changes, maintaining consistent performance. There were no unexpected voltage drops or charging issues.

Extended Use & Reliability

After several months of consistent use, the Sierra International 186855 Battery Isolator has proven to be a reliable and valuable addition to my boat. It has endured numerous fishing trips, varying weather conditions, and consistent usage of onboard electronics. The unit shows no signs of wear or degradation.

Maintenance has been minimal, consisting primarily of visual inspections of the wiring and terminals. So far, there has been no need for cleaning or repair. The simple design and robust construction appear to be contributing to its longevity.

Compared to my previous experiences with manual battery switches and jump-starting stranded boats, the Sierra International 186855 Battery Isolator has been a game-changer. It offers peace of mind and eliminates the constant worry about battery management. It significantly outperforms my previous charging setup.

Breaking Down the Features of Sierra International 186855 Battery Isolator 2 Battery 75 Amp

Specifications

The Sierra International 186855 Battery Isolator 2 Battery 75 Amp features a straightforward and effective design for dual-battery systems. Its primary function is to allow simultaneous charging of two batteries from a single alternator while preventing them from discharging into each other. This ensures that your starting battery is always ready, even if your auxiliary battery is heavily depleted.

• Maximum Output: 75 Amps. This determines the maximum charging current that can pass through the isolator to each battery.
• Number of Batteries: 2. The isolator is designed to manage two separate battery banks.
• Grounding: Negative Ground. It is designed for systems with a negative ground configuration.
• Terminals: Four 1/4″-18 Terminals. These provide secure and reliable connections for the battery and alternator wiring.
• Compatibility: Will not work with Delco CS-style alternators. This is a critical limitation to be aware of before purchasing.
• Function: Automatic Battery Isolation. The isolator automatically manages the charging and isolation process, without manual intervention.

These specifications are crucial because they directly impact the isolator’s performance and suitability for specific applications. The 75-amp rating needs to be sufficient for the alternator’s output and the charging requirements of the batteries. The negative ground configuration must match the electrical system of the vehicle or boat.

Performance & Functionality

The Sierra International 186855 Battery Isolator performs its primary function of isolating and charging two batteries effectively. It automatically senses when the alternator is producing power and directs it to both batteries simultaneously. This ensures that both batteries receive a charge without the risk of one battery draining the other.

A key strength of this isolator is its simplicity. There are no complex settings or adjustments required. It operates automatically, providing a hands-off solution for battery management. It is also a relatively inexpensive solution.

The main weakness is its incompatibility with Delco CS-style alternators. This limits its applicability in some vehicles and requires careful checking before purchase. It might be considered to be a simple design, lacking advanced features found in more expensive electronic isolators.

Overall, it meets expectations for a simple, reliable battery isolator within its specified limitations. It is a good choice for those seeking a basic solution without the need for advanced features.

Design & Ergonomics

The Sierra International 186855 Battery Isolator features a simple, utilitarian design. It is constructed from durable materials and has a compact form factor. It is lightweight and easy to mount in a variety of locations.

The four terminals are clearly marked, which simplifies installation. The unit is not particularly attractive but its functional design is appropriate for its intended purpose.

The design is very user-friendly, with no controls or adjustments required. This makes it suitable for users of all experience levels. It requires no specialized knowledge or tools to install or operate.

Durability & Maintenance

The Sierra International 186855 Battery Isolator is built to last, with a robust construction and durable components. The unit is sealed to protect against moisture and corrosion. This is particularly important in marine and RV applications where exposure to the elements is common.

With proper installation and basic maintenance, the isolator should provide years of reliable service. Maintenance is limited to visual inspections and occasional cleaning of the terminals. There are no user-serviceable parts inside the unit.

Accessories and Customization Options

The Sierra International 186855 Battery Isolator does not come with any additional accessories. However, installation will require basic wiring tools, connectors, and possibly a mounting bracket, depending on the installation location. It is important to use appropriately sized wiring and connectors to ensure safe and efficient operation.

There are no specific customization options for this isolator. Its functionality is fixed and cannot be modified. However, it is compatible with a wide range of batteries and alternators (excluding Delco CS-style).

Pros and Cons of Sierra International 186855 Battery Isolator 2 Battery 75 Amp

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Who Should Buy Sierra International 186855 Battery Isolator 2 Battery 75 Amp?

The Sierra International 186855 Battery Isolator is perfect for boat owners, RV enthusiasts, and anyone with a dual-battery system who wants a simple, reliable way to manage their power. It is ideal for those who need to power accessories without the risk of draining their starting battery. This isolator is great for individuals who prefer a straightforward solution without complex settings or adjustments.

Those with Delco CS-style alternators should skip this product. Also, individuals who require a higher amperage rating or more advanced features, such as voltage sensing or equalization, should consider alternative options.

A must-have accessory would be a reliable set of wiring tools and connectors for proper installation. A mounting bracket might also be necessary depending on the installation location.

Conclusion on Sierra International 186855 Battery Isolator 2 Battery 75 Amp

The Sierra International 186855 Battery Isolator 2 Battery 75 Amp is a solid and dependable solution for managing dual-battery systems. Its simplicity, reliability, and affordable price make it an excellent choice for many applications. While it lacks some of the advanced features of more expensive isolators, it performs its core function effectively.

The price is justified, considering its durability and the peace of mind it provides. For anyone tired of worrying about battery drain or manually switching between batteries, it’s a worthwhile investment.

I would personally recommend the Sierra International 186855 Battery Isolator to anyone seeking a reliable and straightforward battery management solution. If you’re ready to ditch battery anxiety and enjoy worry-free power, give this isolator a try!