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When your power source quits in the cold, your whole operation grinds to a halt. That's a problem the Epoch Batteries 36V 50Ah (1.92kWh) Essential Series Bluetooth & Heated LiFePO4 Battery (Model 3650A-H) was designed to solve, permanently. Whether you're managing a weekend RV getaway in the mountains, keeping a mobile worksite humming on a jobsite, or maintaining a critical off-grid solar system through a brutal winter, this battery doesn't blink. It heats itself up, charges through sub-zero conditions, and lets you monitor every bit of it from your phone. Powerful? Yes. Smart? Absolutely. Drama-free? That's the whole point.
Outbound Power carries this battery because it represents exactly the kind of long-term, no-compromise investment our customers deserve a drop-in lithium solution that replaces aging lead-acid technology with something dramatically lighter, longer-lasting, and built for real life.
At Outbound Power, we specialize in portable and backup power solutions for homeowners, RVers, off-grid adventurers, and mobile professionals. Our team has hands-on experience with every product we carry so when you have a question about compatibility, wiring, or system design, you're talking to people who actually know the answer. Add the Epoch 3650A-H to your system today and experience what it feels like to have power that's truly ready for anything.
The built-in self-heating system warms the battery before charging begins, so it works safely down to -4°F (-20°C). No more skipping charge cycles on cold mornings. Perfect for RVers, campers, and off-grid users in winter climates.
Connect to the free Epoch app via Bluetooth on iOS or Android. See live voltage, charge level, temperature, and health data in seconds. You stay informed and in control without ever touching the battery.
The IP65-rated case keeps out water and dust completely. Whether it sits in an RV bay, a boat, or an outdoor cabinet, it holds up. No corrosion, no leaks, no worries about the weather outside.
LiFePO4 chemistry gives this battery a lifespan of 4,000-plus full charge cycles far longer than lead-acid batteries. There is nothing to fill, clean, or check regularly. Buy it once and rely on it for over a decade.
The built-in Battery Management System guards against overcharging, over-discharging, short circuits, and extreme temperatures automatically. It cuts power before damage happens and reconnects when conditions are safe again. Your investment stays protected every single day.
At just 35 lbs, this battery holds 1.92kWh of usable energy in a compact Group 3D case. That is roughly half the weight of a comparable lead-acid battery. Easier to carry, easier to install, and easier on your vehicle or structure.
Need more capacity? Simply add up to three more batteries in parallel using the Plug and Play setup. No complicated wiring or extra parts needed. Scale your power system from 1.92kWh all the way up to 7.68kWh with ease.
Epoch Batteries provides a limited warranty policy, ensuring the absence of defects in materials, workmanship, and performance during the warranty period.
Epoch Batteries 36V 50Ah (1.92kWh) Essential Series Specifications |
|
|---|---|
| Nominal Voltage | 38.4V |
| Nominal Capacity | 50Ah |
| Energy Stored | 1.92 kWh |
| Cell Configuration | 12S |
| Max Charge Voltage | 43.8V |
| Operating Voltage Range | 30V – 43.8V |
| Max Continuous Charge | 100A |
| Max Charge (10 sec) | 120A |
| Bulk / Absorption Voltage | 42.6V – 43.2V |
| Float Voltage | Disabled (preferred) or 40.0V – 40.8V |
| Re-bulk Voltage | 39.6V |
| BMS High Voltage Cutoff | 43.8V |
| Max Continuous Discharge | 100A |
| Max Discharge (10 sec) | 130A |
| Charge Temperature Range | 0°C (32°F) – 55°C (131°F) |
| Discharge Temperature Range | -20°C (-4°F) – 60°C (140°F) |
| Recommended Storage Temperature | 0°C (32°F) – 35°C (95°F) |
| Reconnect Temperature | 122°F (50°C) |
| Low-Temp Charge Protection | Yes (Self-Heating) |
| Battery Charge Temp Compensation | 0mV/°C (none) |
| Series Connections | Max 1 in series |
| Parallel Connections | Max 4 in parallel (Plug & Play) |
| Bluetooth | Yes (iOS & Android) |
| Self-Heating | Yes |
| Dimensions (L × W × H) | 13.0 × 6.8 × 9.44 in |
| Weight | 35 lbs |
| Case Material | ABS & PC blend (UL94-V0) |
| Enclosure Protection | IP65 |
| Cell Type | Prismatic – LiFePO4 |
| Terminal Type | M8 Female |
| Group | 3D |
| Certifications | UL 1642, UL 9540A, IEC 62619:2022, CE, RoHS |
| Shipping Classification | UN 38.3, Class 9 |
| Cycle Life | 4,000+ cycles |
| Warranty | 11-year manufacturer warranty |
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