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Sapphire Energy

35A SMART Battery Charger (12/24V)

35A SMART Battery Charger (12/24V)

$114.95 CAD
$134.95 CAD $114.95 CAD
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HTRC P35 Battery Charger

A powerful, versatile, and portable charger — designed to keep your Sapphire Energy batteries in peak condition. The HTRC P35 works with both 12V and 24V systems, covering lithium (LiFePO4) and traditional lead-acid battery types. Built-in multi-stage charging profiles ensure safe, efficient, and worry-free charging every time.

With up to 35A output at 12V (18A @ 24V), you can recharge a 200Ah LiFePO4 battery in about 6 hours from empty. Just clip on the heavy-duty clamps, select your mode, and let the microprocessor do the rest.

Why You’ll Love It

  • Automatic voltage detection — works seamlessly with 12V or 24V batteries
  • Safe & smart — microprocessor controlled, reverse polarity protection, and seasonal compensation
  • Powerful output — charge large batteries quickly, or set current limits for smaller ones
  • Portable & quiet — lightweight design with load-dependent cooling fan
  • Versatile modes — includes a forced charge function to re-activate dead lead-acid batteries and wake up undercharged lithium packs
  • Reliable memory — remembers the last charging mode used

We’ve tested the P35 extensively ourselves — it’s compact, reliable, and noticeably quieter than many comparable chargers. Perfect for the shop, garage, or to keep in your travel kit. The built-in forced charge mode is especially useful: it can revive heavily discharged lead-acid batteries and safely “wake up” lithium batteries that have fallen below their cut-off voltage.

Perfect For

  • RV & vanlife — recharge house batteries quickly while plugged into shore power or a generator
  • Off-grid cabins — keep backup batteries topped up during low-solar periods
  • Marine / boats — safe and reliable charging for onboard lithium or lead-acid banks
  • Workshop & garage — maintain or repair batteries for cars, trucks, ATVs, motorcycles, and tractors
  • Emergency backup — revive dead lead-acid or wake up lithium packs when you need them most
  • Travel & service kits — lightweight and portable, ideal for remote work or field service

Specifications

AC Input 100–240V (50/60Hz), 450W max
DC Output 12V (35A max) / 24V (18A max)
Supported Batteries LiFePO4 / Lithium / Lead Acid (AGM, GEL, EFB, MF, Flooded, VRLA, SLA)
Minimum Start Voltage >2V
Suggested Capacity Up to 400Ah (larger supported with extended charging times)
Dimensions 230 × 125 × 70 mm (9.05 × 4.92 × 2.76 in)
Weight 1.0 kg (2.2 lbs)

What’s Included

  • HTRC P35 Charger Unit
  • 2m AC Power Cord (Detachable IEC C13)
  • Replaceable Heavy-Duty Alligator Clamps (XT60 Connector)
  • User Instruction Manual

Frequently Asked

Can the P35 wake up a lithium battery that’s below cut-off?

Yes. Use the built-in forced charge function to safely “wake up” undercharged lithium (LiFePO4) batteries that have tripped their BMS cut-off. Monitor closely and switch to the normal LiFePO4 mode once the pack reaches a healthy voltage.

What size batteries can it charge?

It’s suitable up to ~400Ah at 12V (~200Ah at 24V). Larger banks are supported; charging times will extend accordingly.

Can I hardwire to my batteries?

Yes, using the included XT60 output port you can use custom accessories to hard wire to your battery.
Be sure to fuse appropriately, and be aware the charger will not re-start charging automatically once the charge cycle is completed. You must re-connect, or power cycle, to restart charging.

Does it have a dedicated LiFePO4 mode?

Yes. Select the LiFePO4 mode for correct charge voltages and multi-stage control tailored to lithium iron phosphate chemistry. Press the MODE button until the corresponding indicator is selected.

Will it remember my last mode?

Yes. Mode memory recalls your last used charging mode for quick setup next time.

Can I limit current for smaller batteries?

Yes. Use the adjustable current limit to match smaller batteries or sensitive applications.

Is the fan loud?

The fan is load-dependent and notably quiet compared to many chargers we’ve tested. It ramps up only when needed.

Does it have repair/desulfation for lead-acid?

Yes. An advanced repair mode helps recover performance in sulfated lead-acid batteries.

Can I charge with loads connected?

Generally yes for moderate loads, but charging will be slower. For fastest, most consistent charging, minimize heavy loads during the charge cycle.

Can I use it with a generator?

Yes — as long as the generator provides stable AC within 100–240V, 50/60Hz. For best results use an inverter generator, let it warm up and stabilize before connecting, avoid overloaded/unstable outputs, use a proper-gauge extension cord, and keep cable runs short.

What protections are included?

Reverse polarity, over-temperature, seasonal compensation (summer/winter), and microprocessor-controlled multi-stage charging.

Will it work on 120V and 240V AC?

Yes. Wide-range input: 100–240V AC, 50/60Hz.

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