NewMar BI200 Battery Charger Equalizer
NewMar BI200 Battery Charger Equalizer — Product description
Unlock Seamless Power Management with the NewMar BI-200 Battery Integrator
Imagine powering your boat, RV, or off-grid setup without the frustration of uneven battery charging or unexpected drains between banks. The NewMar BI-200 steps in as your intelligent solution, automatically linking multiple 12-volt battery banks during charging and isolating them during use. This 200-amp powerhouse eliminates the need for bulky diode isolators, delivering efficient, drop-free charging that keeps every battery at peak performance.
Whether you're running house loads from a starter battery or maintaining a dedicated deep-cycle bank for trolling motors and accessories, the BI-200 senses charging voltage—typically around 13.2 volts—and ties banks together like a single unit. Drop below that threshold, and it smartly disconnects, preventing the higher-charged battery from feeding into a depleted one. It's like having a vigilant power butler that ensures selective discharge without constant monitoring.
How the NewMar BI-200 Works: Precision Control in Action
At its core, this battery integrator uses a relay-based design for zero voltage loss, unlike traditional diodes that rob precious energy through heat dissipation. Here's the cycle:
- Charge Mode: Detects alternator or shore power output above 13.2V, closes the relay, and charges all connected banks evenly.
- Isolation Mode: Voltage dips (engine off or heavy load), relay opens, banks stay separate to avoid cross-discharge.
- Boost Option: Wire through the starter circuit for emergency assist from aux batteries during cranking.
This automatic switching handles up to 200 amps continuously, making it robust for demanding setups like marine dual-bank systems or solar-hybrid RVs. No more undercharged house batteries pulling from your starter—freedom to run inverters, lights, or pumps independently.
Why Choose the BI-200 Over Diode Isolators? Real-World Advantages
Diode isolators have served mariners and overlanders for decades, but they come with a hidden cost: a 0.7-1.0V drop per bank, often leading to chronic undercharging unless your alternator compensates. The BI-200 bypasses this entirely, maximizing every amp from your charging source.
| Feature | BI-200 Battery Integrator | Diode Isolator |
|---|---|---|
| Voltage Drop | None | Significant (0.7V+) |
| Efficiency | 100% pass-through | Heat loss reduces output |
| Isolation Reliability | Solid-state relay precision | Passive, always "on" for charge |
| Multi-Bank Scalability | One per extra bank | Complex wiring needed |
Users report longer battery life and fewer replacements, especially in vibration-heavy environments like boats or trucks. Its compact footprint—3 inches high, 3.25 inches wide, 2.5 inches deep, and just 1 pound—fits neatly behind panels without adding clutter.
Perfect Applications for Marine, RV, and Off-Grid Enthusiasts
Marine Use: Pair starter and house banks for reliable trolling or electronics without draining your cranking power.
RV Adventures: Integrate chassis and coach batteries, supporting boondocking with solar or generator inputs.
Solar & Overland: Manage aux batteries for winches, fridges, or lights alongside your primary pack.
Expand to three or more banks by adding units per pair—scalable protection for complex systems. Harsh conditions? Its rugged build shrugs off moisture, salt air, and jolts better than competitors.
Tips for Long-Term Performance and Troubleshooting
To get the most from your BI-200:
- Ensure clean, tight connections—corrosion kills efficiency.
- Monitor voltage with a multimeter during initial setup to verify thresholds.
- Avoid oversizing wires; match to 200A rating for minimal resistance.
- If it doesn't engage, check for low system voltage or faulty sensing leads.
Regular checks extend its lifespan, often outlasting the batteries it protects. Pro tip: In cold climates, it shines by preventing weak batteries from dragging down stronger ones.
Frequently Asked Questions
What makes the NewMar BI-200 different from a standard battery isolator?
Unlike diode-based isolators that cause voltage drops and heat loss, the BI-200 uses a relay for full pass-through efficiency, connecting banks only during charging and isolating them otherwise.
Can the BI-200 handle high-amperage charging sources?
Yes, it's rated for 200 continuous amps at 12 volts, ideal for alternators, solar controllers, or shore chargers in demanding setups.
Does it work with more than two battery banks?
Absolutely—install one BI-200 per additional bank beyond the first two for full integration and isolation across the system.
What voltage triggers connection and disconnection?
It connects banks at approximately 13.2 volts or higher and disconnects below that to prevent cross-discharge.
Is the BI-200 suitable for marine or RV environments?
Yes, its compact, rugged design withstands vibration, moisture, and salt exposure common in boating and recreational vehicles.
Can I use it for starter assist from an auxiliary battery?
Connect via the key starter circuit for automatic boost sensing, providing cranking help only if the aux battery has sufficient charge.
How do I know if the unit is functioning correctly?
Listen for the relay click during charging, or use a voltmeter to confirm voltage parity across banks when connected.
NewMar BI-200 Battery Integrator, 12 Volt, 200 AmpCharging multiple battery banks without use of diode isolators dictates that the batteries be connected or ?integrated? only whenever a charge voltage is present so that they may be charged simultaneously, then disconnected or ?isolated? when in use to allow for selective discharge and avoid having the secondary or standby battery drain into the primary battery.Battery Integrators perform this function automatically, acting as a ?smart? switch to connect independent battery banks only when a charging voltage is present. Otherwise, they are isolated, and discharge between banks is prevented.The traditional rugged and reliable diode isolator can also be used for this function, as it also maintains isolation between banks and allows charging from multiple sources. However, one drawback is inefficiency when voltage is lost as current passes through the diodes, resulting in undercharge if the charging source does not compensate for the voltage drop.The Battery Integrator causes no voltage drop in the charging system, while the multiple batteries are charged as a single bank whenever a charging source of approximately 13.2 VDC or 26.4 VDC or greater is present (depending on model).When the alternator or charger is off or a large load causes the voltage to drop below the disconnect point the unit breaks the common tie between the banks. This allows selective battery discharge and prevents ?dumping? of a higher-charged bank into a lower-charged bank. The unit may also be activated to connect other batteries through the key starter or a manual switch to provide an added ?boost? from the secondary battery whenever the starter is engaged and the unit senses there is sufficient voltage in that battery to provide an assist.For systems with more than two banks, an isolator must be installed for each additional bank to provide the same isolation and integration as described above.Dimensions: 3"H x 3.25"W x 2.5"D; Wt: 1 lb.
NewMar BI200 Attributes
SKU: NVN-2005087
MPN: BI-200
UPC:
Technical specifications
| Brand | NewMar |
| Model | NewMar BI200 Battery Charger Equalizer |
| SKU / MFR# | 2005087 |
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