Why You'll Love It
| All-Season & Cold-Weather Charging | 50 W self-heater automatically warms cells to +5 °C before charging, allowing safe charging even in sub-zero temps (down to −20 °C discharge). | ||
| Bluetooth 5.0 Insights | Monitor SoC, voltage, current, temperature, cell balance, and alerts in real time via the mobile app — always know what your battery is doing. | ||
| High Output Power | 200 A continuous discharge rating with 5,120 Wh of stored energy — ready to support large inverters, tools, and appliances without compromise. | ||
| Portable & Rugged | Weighing ~83 lb (37.8 kg) with rope handles and an IP65 enclosure — built to move and built to handle tough conditions. | ||
| Built to Last | A+ grade LiFePO₄ cells rated for 5,000+ cycles, with robust BMS protection against over-current, over-discharge, and temperature extremes. | ||
| Warranty & Support | Backed by a 5-year warranty and Canadian-based support — confidence and service for the long haul. |
Reliable Power for Every Adventure
Serious capacity for serious setups. The Sapphire Energy 24 V 200 Ah Self-Heating Bluetooth LiFePO₄ delivers a huge 5.12 kWh of clean, stable power with a 200 A continuous output—built for large inverters, tools, and whole-day loads in RVs, marine, and off-grid systems.
Built around A+ grade LiFePO₄ cells and smart battery management, it’s designed for 5,000+ cycles at typical DoD for years of dependable use. Rugged construction and easy-lift rope handles make installation and maintenance straightforward in the real world.
Cold-Weather Charging Protection
Automatic self-heating system
Winter ready. The integrated 50 W heater automatically warms the cells to a safe charging temperature (about +5 °C) before accepting charge, so you can top up confidently when it’s below freezing.
Enjoy reliable performance across the seasons with cold-weather charging safeguards and steady discharge down to −20 °C. Less worry, more runtime.
Solar Advantage at 24 V
More PV watts per controller, without upsizing
Stretch your solar further. Running a 24 V battery bank lets many MPPT charge controllers accept roughly 2× the solar wattage compared to a 12 V bank—often without buying a larger controller. Higher battery voltage also reduces array current for the same power, cutting losses.
It’s a smart upgrade path: keep your existing controller (check its specs), add panels more affordably, and harvest more energy each day—especially valuable for cabins, vans with roof constraints, and marine decks.
High-Capacity, High-Output
Why 24 V beats 12 V for big loads
Lower current, higher efficiency. At 24 V, your system draws half the current for the same power versus 12 V. That means smaller wire sizes, smaller fuses, less voltage drop, and less heat—all of which improve performance and safety while saving money on copper.
Pair the battery’s 200 A continuous rating with a 24 V inverter for better efficiency under heavy loads. It’s the clean, scalable foundation for serious off-grid living, mobile workshops, and extended voyages.
Smart Bluetooth Monitoring
Real-time battery data at your fingertips
Know more, guess less. The Bluetooth 5.0 app shows state of charge, voltage, current, cell balance, temperatures, and alerts—so you can verify performance, spot issues early, and optimize charge sources for a larger 24 V bank.
Track trends over time to dial in solar, alternator charging, or shore power—and squeeze more useful hours from your system every day.
Expandable & Durable
Grow your system as your needs expand
Start with one, build as you go. Wire up to 2 in series for 48 V systems, or up to 4 in parallel for extended runtime (check your BMS and system design). A 24 V bank of 4 in parallel provides roughly 20.48 kWh; two in series (48 V) yields about 10.24 kWh at 200 Ah.
Built to last with robust BMS protections and rugged construction, this pack is a future-proof upgrade you won’t outgrow soon.
High-Output BMS Protection
Smarter safeguards for everyday reliability
The integrated high-output BMS continuously monitors voltage, current, and temperature to keep your battery predictable under heavy loads. It provides protection against over-charge, over-discharge, over-current, and short-circuit events, plus low-temperature charge cut-off and high-temperature disconnect.
Active cell balancing helps maintain performance and longevity across the pack—and if something goes out of spec, the BMS acts fast and resets when conditions normalize.
The Sapphire Energy Advantage
Confidence you can count on. Every Sapphire battery is supported by a 5-year limited warranty and responsive, Canadian-based technical support. Our focus is on long-term reliability, safety, and a smooth ownership experience—before and after your purchase.
If you ever need help, you’ll reach a team that understands real-world mobile and off-grid power and can guide you quickly and clearly.
Applications
- Van builds & RVs — Upgrade to 24 V to halve current draw, use smaller cables, and save money on smaller fuses and fuse blocks while running fridges, fans, lights, and inverters more efficiently.
- Off-grid cabins & tiny homes — Daily 120 V/240 V usage via inverter with 5.12 kWh storage; add parallel units as needs grow.
- Marine house banks — Reliable power for refrigeration, windlass, electronics, and other high-draw loads with cooler cabling at 24 V.
- Mobile workshops & service vans — Support heavy tools, compressors, and chargers with reduced wire size and heat thanks to higher system voltage.
- Food trucks & mobile retail — Smooth inverter performance for appliances and POS gear; self-heating safeguards cold-weather charging.
- Telecom & networking — Stable 24 V backbone for routers, Starlink, LTE gateways, and PoE switches with long runtimes.
- Emergency backup — Keep essential DC loads and communications online during outages with ample surge headroom and easy scaling (up to 4× parallel).
- Pumps & utility loads — Better efficiency for pressure/transfer pumps and intermittent high-draw loads.
- Solar systems — 24 V banks often allow ~2× the PV watts on many MPPT controllers vs 12 V, without upsizing the controller.
- Upgrade path from 12 V — One 24 V battery avoids series-pair balancing hassles and improves long-term stability.
Performance in Real-World Setups
24 V architecture halves current for the same power—smaller cables, cooler runs, and better inverter efficiency.
With 5.12 kWh of storage and a 200 A continuous BMS, this pack comfortably supports common 24 V inverter sizes in the 2–4 kW class. Typical mixed-use scenarios—refrigeration, lighting, fans, devices, and periodic high-draw appliance use—benefit from the lower current of 24 V: you’ll see smaller wire and fuse sizes, less voltage drop, and reduced heat, which translates to higher efficiency and cleaner installs.
Need more runtime? Parallel up to 4 units for roughly 20.48 kWh at 24 V. If your design calls for higher bus voltage, up to 2 in series yields a 48 V system (≈10.24 kWh at 200 Ah). Always follow inverter and charger manufacturer limits for DC input current, cable length, and protection devices.
Install & Sizing Tips
System voltage: 24 V nominal. BMS rating: 200 A continuous. Series/parallel: up to 2S (48 V max) or 4P. Target ≤ 2–3 % DC voltage drop on main runs.
Inverter pairing: 24 V inverters are typically more efficient under heavy loads than 12 V. Because current is halved at 24 V for the same wattage, you can use smaller conductors and fuses while reducing heat and stress on terminations. Protect the main DC run with a properly sized ANL or Class-T fuse per inverter and cable specs.
Solar advantage: On many MPPT controllers, a 24 V battery bank allows about 2× the PV wattage compared to a 12 V bank without changing controller size (confirm your controller’s 24 V charge-current limit and PV input rules). This helps expand arrays more affordably and harvest more energy per day.
Charging & settings: Use LiFePO₄-appropriate profiles per the battery’s spec sheet (typical 24 V absorb ≈ 28.4–28.8 V; float ≈ 27.0 V if used). For alternators, use a 24 V-compatible DC-DC charger sized to your wiring and duty cycle. Keep cable runs short, route for ventilation, and torque lugs to spec.
Key Features
- Massive 5.12 kWh capacity (24 V × 200 Ah) with 200 A continuous discharge — ready for large inverters and heavy loads
- Self-Heating Technology — 50 W pad warms cells to ~+5 °C for safe charging in sub-zero climates
- Bluetooth 5.0 monitoring — check SoC, voltage, current, temps, and cell balance from your phone
- High-Output BMS — handles 200 A charge/discharge with protections for over/under-voltage, over-current, short-circuit, and temperature
- Low-temp & high-temp cut-offs keep the battery safe during extreme charging or discharging conditions
- Rugged IP65 case with rope handles; sealed against dust and light water spray
- A-grade LiFePO₄ cells — over 5,000 cycles at typical DoD; maintenance-free chemistry
- Flexible bank options — connect up to 2 in series (48 V) or 4 in parallel for larger systems
- Integrated cell balancing for even charge levels and long-term stability
- 10-Year expected service lifespan
- 5-Year warranty with Canadian support for peace of mind
Engineered for Demanding Environments
The Sapphire Energy 24 V 200 Ah LiFePO₄ battery is built for serious off-grid, RV, marine, and backup applications. Its high-output BMS continuously manages voltage, current, and temperature while supporting 200 A continuous discharge — perfect for big inverters and heavy-duty DC loads.
A self-heating system automatically pre-warms cells before charging below 0 °C, while low-temperature and high-temperature cut-offs prevent damage in harsh conditions. The Bluetooth app makes it easy to monitor state of charge, cell health, and temperature in real time, giving you confidence wherever you use it.
With IP65 sealing, rope handles, and robust LiFePO₄ chemistry rated for 5,000+ cycles, this battery is a long-term power solution for vans, cabins, boats, or anywhere you need reliable 24 V energy.
Specifications
- High-performance A-grade LiFePO₄ cells
- Advanced 200 A BMS with low/high temp & over-current protection
- Bluetooth 5.0 monitoring for live SoC, voltage, current, and alarms
- 50 W self-heating for cold-weather charging
- Cell balancing for long-term stability
- IP65 dust & splash protection
- 5-year limited warranty • 5000+ cycle life
| Model: | 24V200BTHTX |
|---|---|
| Nominal Voltage | 25.6 V |
| Nominal Capacity | 200 Ah |
| Energy | 5120 Wh (5.12 kWh) |
| Continuous Discharge | 200 A |
| Recommended Charge Current | ≤ 100 A |
| Recommended Charge Voltage | 28.4 – 28.8 V (max 29.2 V) |
| Cell Balancing | Begins at ≈ 3.45 V per cell |
| Max Series / Parallel | 2 S / 4 P (48 V max) |
| Cycle Life | 5000+ cycles (80% capacity) |
| Communications | Bluetooth 5.0 |
| Ingress Rating | IP65 |
| Dimensions (L×W×H) | 520 × 269 × 218 mm (20.5 × 10.6 × 8.6 in) |
| Weight | ≈ 37.8 kg (83 lb) |
| Operating Temperature – Charge | 0 °C to +55 °C (self-heats below ~5 °C) |
| Operating Temperature – Discharge | −20 °C to +60 °C |
| Temperature Notes | Charge stops at ≤0 °C (auto-resume ≥+5 °C) Discharge stops at ≤−20 °C (auto-resume ≥−10 °C) Heating on/off at ~+5°C (While Charging Only) |
| Warranty | 5-year limited |
Getting Started & Sizing
What size LiFePO₄ battery should I start with?
Easy first picks by use case:
• Budget/compact: 1280Wh — 12.8V 100Ah Classic
• More runtime: 2560Wh — 12.8V 200Ah Classic
• Winter & higher output: 2560Wh — 12.8V 200Ah Self-Heating Bluetooth (High Output)
• Longer runtime: 3840Wh — 12.8V 300Ah Bluetooth
New to sizing? How much battery do I need?
Can I replace my lead-acid battery one-for-one?
What inverter size pairs well with my first battery?
Why choose a single 24 V battery instead of 2×12 V in series?
• No pack-to-pack balancing — one case, one BMS, one Bluetooth connection.
• Simpler wiring — fewer cables, no series jumpers.
• Easier monitoring — one app (if Bluetooth).
• Lower current for the same power — slimmer cables and cooler-running inverters.
See our 24V 200Ah Self-Heating Bluetooth (High Output).
Charging: AC, Alternator & Solar
Do I need a charger made for LiFePO₄?
AC → DC charging (shore power or generator) — a dedicated LiFePO₄ charger converts household AC into a precise DC charge curve matched to lithium chemistry. If you’re plugging in at campgrounds, marinas, or with a small generator, this is the simplest route. Browse our LiFePO₄ Battery Chargers.
Solar charging — pair your panels with a solar charge controller that has a LiFePO₄ profile (or custom setpoints). The controller handles MPPT/PWM regulation and applies the correct voltages to protect the battery and maximize harvest. See our Solar Charge Controllers. If your controller offers user-defined setpoints, use the same 12 V targets above (bulk/absorb ~14.2–14.6 V; minimal/disabled float; no equalize).
Can I charge from my vehicle alternator?
Why Would I Need Self Heating?
Our Self-Heating batteries solve this by warming the cells automatically whenever charging is requested below freezing. The pack heats to a safe internal temperature, then begins charging—no manual steps. This is ideal for northern climates, winter activities (ice fishing, ski trips), vanlife, and outdoor storage where temps fluctuate. Adding insulation around the battery compartment helps it warm faster and reduces temperature swings for more consistent performance.
How much solar should I pair with a 12 V system?
Design rule of thumb (off-grid): 3 days of autonomy. That means sizing battery + solar so you can run for ~3 cloudy days without fully depleting the battery. If you also have alternate charging like a DC-DC alternator charger or occasional AC charger at campgrounds, you can safely reduce that autonomy target because you’re not relying on solar alone.
Step 1 — Calculate your daily watt-hours (Wh)
Make a list of devices: Watts × hours per day = Wh/day. Add them up.
Example day: LED lights (15 W × 4 h = 60 Wh), laptop (60 W × 3 h = 180 Wh), 12 V fridge (40 W avg × 24 h ≈ 960 Wh), phone charging (10 W × 2 h = 20 Wh). Total ≈ 1,220 Wh/day.
Step 2 — Size the battery bank
Battery capacity in Wh = Voltage × Ah. A 12 V 100 Ah LiFePO₄ ≈ 1,280 Wh, with ~80–90% usable = ~1,000–1,150 Wh usable. For 1,220 Wh/day and one day of autonomy, you’d look at ~12 V 200 Ah. For the full 3-day autonomy target, ~12 V 300–400 Ah (or a 24 V bank to reduce current).
Step 3 — Size the solar
Daily solar production ≈ Panel Watts × Sun-hours × system efficiency (efficiency often ~0.7 to include controller/battery losses). With 400 W of panels and 4 sun-hours: 400 × 4 × 0.7 ≈ 1,120 Wh/day—close to our 1,220 Wh example. If you drive daily with a DC-DC charger, you can rely on alternator charging to fill the gap and may choose fewer panels.
Be honest about heavy loads. High-draw devices (kettles, coffee makers, induction, space heaters) and large inverters increase both battery size and solar needed. Start small and expand as you confirm your real-world use.
For a deeper walkthrough, see How much battery do I need?, and explore Solar Products plus Charge Controllers.
Installation & Wiring
Can I connect multiple Sapphire batteries together?
Best practices: fully charge each battery before linking, use equal-length interconnects so currents share evenly, and match model/age/capacity. A Bluetooth model or a shunt monitor makes verification easy.
What wire size and fuse should I use?
Need parts? See Wiring & Accessories. For manuals and inverter/charger specs, visit Downloads.
Can I install my battery indoors?
Can I mount the battery on its side? Is the case weather-resistant?
Operation, Safety & Monitoring
Are Sapphire LiFePO₄ batteries safe?
How can I monitor health and state of charge (SOC)?
1) Shunt-based monitor (most accurate) — installs on battery negative and measures all current in/out to compute SOC, amps, Ah used, and time remaining. Our BM02 includes the shunt, an LCD, and a phone app. Wiring: battery negative → shunt → system negative, plus a small positive lead for the display.
2) Bluetooth batteries (fast & easy) — our Bluetooth packs report voltage, current, temperatures, cell balance, and BMS status in the app. A great example is the 12V 200Ah Self-Heating Bluetooth (High Output). Manuals and apps: Downloads.
Tip: Shunt monitors excel at accurate SOC over time; Bluetooth is great for diagnostics and cell-level detail.
What temperature range should I plan for?
Maintenance & Storage
What’s your warranty and typical lifespan?
How should I store the battery off-season?
Do your batteries need routine maintenance?
Troubleshooting
My battery shut off under load—what caused it?
It won’t start charging after running flat—how do I “wake” it?
Policies, Shipping & Compatibility
Where do you ship from and what are the terms?
Can I mix different brands or capacities?
Where can I find manuals, spec sheets, and apps?
