New 2000W & 3000W Pure Sine Wave Inverters Coming Soon Learn more
Popular Searches
1 9

HQST 12V/24V 30A Buck Boost DC-DC Solar Charge Controller with MPPT

SKU: HCC30DCSR-G1-US
$159.99 $305.99
Free shipping.

  • 【Intelligent Dual Power Input】Charging Supports both solar panel and engine power (EXT) inputs. With its advanced charging logic, this DC to DC charger prioritizes solar power when available. If solar power is insufficient, it uses both solar and generator power. When solar power is very low, it relies solely on the generator (starter battery) while keeping the starter battery within a safe voltage range. It provides a max of 30A total output regardless of the charging method.
  • 【12V-24V Buck Boost Battery Charger】Featuring buck and boost charging logic, this on board battery charger supports both 12V and 24V systems. It can boost 12V power to charge a 24V battery and buck 24V power to charge a 12V battery. This allows your auxiliary battery to charge your starter battery, and vice versa, if your battery systems have different voltages. Note that the buck and boost functions do not apply to solar array systems.
  • 【High-Efficiency MPPT Solar Charge Controller】This DC to DC charger with MPPT uses advanced technology to achieve up to 99% tracking efficiency and 98% peak conversion efficiency, about 30% higher than PWM controllers. It features smart 3-phase charging stages (Bulk, Boost, Float) to regulate the entire charging process, ensuring batteries are accurately charged to 100% at the correct voltage levels. It supports LiFePO4, sealed, AGM, GEL, flooded, and user-customized battery types.
  • 【Smart Bluetooth App Control & Monitoring】Equipped with a built-in Bluetooth module, this 12V/24V DC to DC battery charger works with the "ChargePro 2.0" app for real-time monitoring and stores up to 300 days of historical data. You can also set battery parameters easily via the app. Note: Bluetooth connection is effective within a 10m/33ft range (in an unobstructed area).
  • 【All-Round Safety Protection & High-Temp Resistant Materials】This DC battery charger offers all-around safety with multiple protections, including PV over-voltage, PV reverse polarity, battery over-voltage, overcharge, battery reverse polarity, EXT input over-voltage, EXT reverse polarity, overheating, and high ambient temperature safeguards. The connection terminals are made from high-temp resistant materials, ensuring safety even under high current conditions.
Quantity：
Enjoy payments with
Return & refund policy

Shipping, Returns & Refunds Policy

Shipping

  • Free standard ground shipping on orders $49.99+ (before tax).
  • Orders below $49.99 are charged a $5 flat shipping fee.
  • Free shipping applies within the contiguous United States only.
  • Oversized, heavy, or restricted items may be excluded (noted on product page).
  • Orders are processed within 1–3 business days (excluding weekends and holidays).
  • Estimated delivery time is 2–7 business days after shipment.
  • Orders may ship in multiple packages, each with its own tracking number.
  • A valid street address is required; some items cannot be delivered to PO Boxes.
  • Shipments cannot be rerouted once shipped.
  • Shipping to Alaska and Hawaii is available with surcharges.
  • International shipping availability varies by location; customers are responsible for customs clearance and duties.

Order Cancellation

  • Orders can be canceled within 4 hours of placement, before shipping begins.
  • Once shipped, cancellation or interception cannot be guaranteed.

Returns

  • Return requests must be submitted within 30 days of delivery.
  • Items must be unused, undamaged, unmodified, and returned in original packaging.
  • A Return Merchandise Authorization (RMA) is required before returning any item.
  • Modified products are not eligible for return.

Return Shipping Costs

  • HQST covers return shipping only if the product was damaged during shipping, defective, or an incorrect item was delivered.
  • For all other reasons, return shipping costs are the customer’s responsibility.

Refunds

  • Refunds are issued within 7–10 business days after inspection.
  • Refunds are processed to the original payment method.
  • Damage caused by improper installation or handling is not eligible for refund.

Replacements

  • Shipping or manufacturing damage must be reported within 30 days, with supporting photos.
  • Replacement items ship via standard shipping only and cannot be expedited.
  • Replacements can only be shipped to the original country of purchase.

Third-Party Purchases

  • Orders placed through third-party sellers are subject to the seller’s return policy.
  • HQST provides warranty replacements only for eligible third-party purchases.

Contact

For shipping, returns, refunds, or replacements, contact:
sales@myhqsolar.com

Description
Includes
Specs
Downloads
FAQ
Reviews

HQST 12V/24V 30A DC to DC Charger, Buck Boost Battery Charger, MPPT Solar Charge Controller, Dual Input Charger, with Smart Bluetooth APP Control, for LiFePO4, Sealed, AGM, GEL, Flooded Batteries

If you're looking for a battery charger that keeps your auxiliary and starter battery systems charged during RV road trips, rain or shine, HQST's innovative 2-in-1 12V/24V 30A DC to DC Buck Boost MPPT Solar Charge Controller is the perfect choice!
With exclusive intelligent charging logic, this dual-input DC to DC battery charger switches to solar charging in sunlight and transitions to generator charging in low light, ensuring uninterrupted power for your battery systems. With boost and buck logic, it supports 12V and 24V systems, including 12V to 24V and 24V to 12V conversions.
The high-efficiency MPPT provides up to 30% more efficiency than conventional PWM, and the Bluetooth app allows for easy real-time data monitoring and settings adjustments.

Dual Input Charger
Boost-Buck Charger
Download
Paring
Control & Settings
What's in the Box

Silent Heat Dissipation

Our DC to DC charger is equipped with an integrated heat sink on the back, ensuring efficient heat dissipation and optimal charging performance.

Starter Battery Protection

Our on-board charger features smart detection protection, ensuring your starter battery always has enough power for your vehicle.

Use Provided Terminals

Our terminal connection part features high-temp resistant materials that won’t deform under high currents, reducing the risk of damage.

Multi-Alternator Compatibility

Compatible with traditional and smart alternators, this DC-DC charger features an IGN port for auto-activation with smart alternators.

30A DC to DC Buck-Boost MPPT Solar Charge Controller

x 1

User Manual

x 1

Temperature Sensor Cables (6.6 ft)

x 2

Mounting Stickers (for Temp Sensor)

x 2

Connection Terminal Accessories

x 8
Input Voltage
Battery: 8V - 32V; PV: 60 Voc Max.; EXT: 8V - 25V
Input Amps (Max.)
30 A
Output Voltage
14.5 x N (±0.1) VDC; *N=1 (12V) / 2 (24V)
Output Amps (Max.)
30 A
Battery Voltage Compatibility
12V / 24V
Power Consumption
450W (12V) / 900W (24V)
Efficiency
Tracking Efficiency: 99%; Peak Conversion Efficiency: 98%
Battery Types
Lithium Iron Phosphate (LiFePO4), Sealed, AGM, GEL, Flooded (FLD), User-customized
EXT Port Compatibility
DC Alternator, Adapter, Charger, Power Supply, Battery
Operating Temperature Range
-13℉～113℉(-25℃～45℃)
Storage Temperature Range
-31℉～149℉ (-35℃～65℃)
Communication Port
RS485, CAN
Wiring Cable
8 AWG (Recommended)
System Wiring Grounding
Negative Grounding
Dimensions
12 x 6.9 x 3 in / 305 x 175 x 76mm
Product Net Weight
5.4 lbs / 2.45 kg
Material and Workmanship Warranty
1-year material warranty

HCC30DCSR-Manual

Download

Can I use this charge controller with solar panels and a generator simultaneously?

Yes, it supports dual input from both solar panels and generators. The intelligent charging logic prioritizes solar power and seamlessly switches to generator power when solar input is insufficient.

Can this charge controller charge different voltage systems?

Yes, it can charge both 12V and 24V battery systems and can handle 12V input to charge a 24V battery and 24V input to charge a 12V battery, thanks to its buck and boost functionality. Note: buck and boost functions do not apply to solar array system.

Is there protection for my starter battery when it charges the auxiliary battery?

Yes, it has intelligent protection to ensure your starter battery always has enough power for your vehicle. It will detect the voltage of the starter battery, and if it drops below 12.8V, it will cut off the output to preserve its power.

Is there any heat dissipation design?

Yes, it features an integrated heat sink design on the back for efficient heat dissipation and maximum charging efficiency. Additionally, the connection terminals use high-temp resistant materials, ensuring safety even under high current conditions.

How does the MPPT feature benefit my charging system?

MPPT tech optimizes the power output from your solar panels or other power sources, ensuring that your batteries receive the max possible charge even under varying conditions, which improves efficiency by up to 30% compared to PWM controllers.

Reviews

Best Sellers