Xantrex Battery Temperature Sensor (BTS) f/XC & TC2 Chargers

Optimizing your battery charging process starts with precise temperature monitoring, and that's where the Xantrex Battery Temperature Sensor shines. In demanding environments like RVs, marine vessels, or off-grid setups, battery performance can swing wildly based on ambient conditions. Extreme heat accelerates charging but risks gassing and reduced lifespan, while cold weather slows chemical reactions, leading to undercharging and sulfation. This sensor steps in as your smart intermediary, delivering real-time temperature data to your charger for automatic voltage adjustments—ensuring every charge cycle maximizes capacity without compromise.

How the Xantrex BTS Enhances Battery Charging Precision

At its core, the sensor clips directly onto a battery terminal post or side terminal, leveraging a 25-foot cable for flexible placement in your battery bank. It communicates seamlessly with compatible chargers, feeding accurate temperature readings that trigger temperature compensation. This means higher charge voltages in cooler conditions to fully saturate the cells, and tapered voltages in heat to prevent overcharging. The result? Healthier batteries that last longer, with fewer deep discharges and replacements—critical for anyone relying on 12V or 24V systems in variable climates.

Key Specifications at a Glance

• Compatibility: Tailored for TRUECharge2 and XC Series chargers, including models like 804-1220-02, 804-1240-02, 804-1260-02, 804-2410, 804-2420, and 804-2430.
• Mounting Options: Secure fit on terminal posts or battery side terminals for reliable contact.
• Cable Reach: 25 feet of durable wiring handles complex installations.
• Build Quality: Engineered for rugged use, backed by ISO 9001:2015 certification and compliance with UL, CSA, or CE standards.

Real-World Benefits for Power Users

Boat owners battling humid decks, RV enthusiasts camping in deserts, or solar setups enduring freezing nights all benefit from this sensor's durability and efficiency. It prevents common pitfalls like voltage mismatches that shorten lead-acid, AGM, or lithium battery life. Users report noticeable improvements in charge acceptance rates and overall system reliability, especially during multi-stage charging where bulk, absorption, and float phases demand spot-on regulation. Plus, its plug-and-play design means no complex wiring—just mount, connect, and let your charger do the heavy lifting.

Pro Installation Tips for Peak Performance

Position the sensor on the negative terminal of the battery farthest from the charger to capture the most representative temperature in the bank. Ensure clean metal contact for accurate readings, and route the cable away from heat sources or sharp edges. In multi-battery setups, prioritize the hottest or coldest unit to reflect the pack's extremes. Testing post-install? Monitor charger display for temperature acknowledgment—most TRUECharge2 units show it directly, confirming everything's synced.

Why Temperature Matters in Battery Maintenance

Batteries are chemical powerhouses sensitive to thermal swings. Ideal charging hovers around 25°C (77°F), but real life throws curves: +40°C summers demand 20-30% voltage reduction, while sub-zero winters might need boosts up to 20%. Without compensation, you face chronic underperformance or damage. This Xantrex BTS bridges that gap, drawing on decades of power electronics expertise to deliver pro-level control in consumer-friendly form.

California Proposition 65 Warning: This product can expose you to chemicals including Diisononyl Phthalate (DINP), known to the State of California to cause cancer, and Di-isodecyl Phthalate (DIDP), known to cause reproductive harm.