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Guest 12v/24v 20 Amp CHARGEPRO 10/10 2 Bank On-Board Smart Charger

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Product InformationStore Part Number: 2720A


Replaces: Guest GU2620A, Guest 2620A, Marinco 28220

The Guest 2720A On-Board battery chargers have been redesigned from the inside out with the customer in mind. The 2720A charger is a marine waterproof IP67 rated charger that has two 12v outputs. Both 12v outputs have a rating of 12v 10 Amps each for the combined 20 amp rating. The charger can charge two indvidual 12v battery banks, or a 24v battery bank by connecting to each 12v battery that is in the series setup.

The newest generation Guest On-Board Marine battery chargers include leading advancements in digital charging technology and waterproof design/construction. Every Guest charger has a dedicated charging, sensing and control per bank. The easy to read graphics indicates the status of each battery bank through the charging process.

Recommended uses: Bulk charge of flooded and AGM maintenance free batteries group 24 (Approx 75 AH) through group 31 (Approx 110 AH), and charge/maintenance of batteries partially discharged up to 150 amp hours. Not Recommended for 6 Volt Batteries, 4D or 8D batteries, or any combined battery amp/hr over 150 AH per battery bank.


  • For Flooded & AGM Lead Acid Batteries
  • All high frequency, digital charging technology
  • Fully automatic 5-stage performance charging
  • Dedicated battery charging, sensing and control per bank
  • Expanded LED charge status monitor
  • Wiring and battery fault detection
  • Auto-maintain energy saver mode
  • Up to 40 percent lighter
  • 100 percent Waterproof (IP67) and shock resistant for all fresh and saltwater applications
  • Pre-wired for easy installation
  • For 12 volt flooded and AGM lead acid batteries
  • Built-in safety: reverse polarity, over-current, over-voltage, over-temperature and ignition protection. In-line fuses for maximum DC wire protection.
  • 2 year warranty


For 24v series configurations you must be using two 12v batteries/banks in series, and each 12v battery/bank will receive a dedicated 12v 10 Amp charging bank.

Tech Specs

  • Dimensions (LxWxH): 12.9 x 7.5 x 2.4 in
  • Weight: 8 lbs
  • Shipping Weight: 12 lb
  • AC Input Amps: 4 A
  • AC Input Volts: 120 V
  • AC Input Volts Freq.: 50/60 Hz
  • AC Input Volts Range: 90-135 V
  • Max Current, During Bulk Charge: 20 A (10A/10A)
  • Min Battery Voltage Per Bank: 4.0 V
  • Model: 2720A
  • Manufacturer: Guest/Marinco
  • Absorption Voltage: 14.6 V
  • Absorption Output Current: 2-10 A
  • Float Voltage: 13.4 V (Auto Maintain Energy saver mode)
  • Enclosure: Plastic Composite
  • Output Banks: 2
  • Waterproof: IP67 Rated
  • Regulatory Approval: Conforms to UL STD. 1236 / Certified to CSA STD. C22.2 No. 107.2 / FCC Class B / Design and Constructed to ABYC A-31 / CEC Listed
  • RoHS: Compliant
  • Manufacturer Part #: 2720A
  • UPC: 046904904136
  • Made In: Asia

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