Newmar PT-24-20U 24v 20A Charger 115/230V Input
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Newmar PT-24-20U 24v 20A Charger 115/230V Input Product Description
Power Up Your Marine or RV Batteries with Reliable Precision
Imagine heading out on the water or hitting the road, only to find your batteries drained and unreliable. The Newmar PT-24-20U eliminates that worry with its intelligent design tailored for demanding environments like boats, yachts, work vessels, RVs, and commercial setups. This 24V 20A charger delivers consistent power across three isolated banks, ensuring each battery gets the attention it needs without interference. Its universal input handles fluctuating shore power seamlessly, adapting from 115V to 230V for global compatibility.
What sets it apart? Beyond basic charging, it employs advanced "smart" algorithms that monitor and adjust in real-time, preventing overcharge while maximizing capacity. Boat owners rave about how it revives deep-cycle batteries faster than traditional chargers, cutting downtime and extending service life by up to 50% in rigorous tests.
Mastering the Three-Stage Charging Process
Unlike single-stage chargers that can boil electrolytes or sulfate plates, this unit follows a proven three-phase cycle:
- Bulk Phase: Rapid high-current delivery to restore 70-80% capacity quickly, ideal after heavy use.
- Absorption Phase: Constant voltage with tapering amps to top off without gassing.
- Float Phase: Trickle maintenance to keep batteries at peak readiness indefinitely.
A built-in selector switch fine-tunes for flooded lead-acid, gel-cell, or AGM types, while an optional temperature sensor compensates for ambient changes—crucial in engine rooms where heat spikes.
Built Tough for Real-World Demands
Encased in rugged stainless steel with a durable white powder coat, it laughs off saltwater spray, humidity, and vibrations. Internal circuits get polyurethane protection against corrosion, earning it ignition protection ratings for safe onboard use. Current limiting safeguards against overloads, and it doubles as a clean DC power supply—even sans batteries—for sensitive electronics.
Monitor progress effortlessly with an integrated ammeter for total output and LED indicators signaling charge status. For remote oversight, pair with an optional panel. At 13.85 inches long, 9.5 inches wide, and 5 inches high, it fits tight spaces without skimping on power.
Perfect Fit for Diverse Battery Banks
Handle systems from 40 to 200 amp-hours across three independent banks. Whether charging house batteries, thrusters, or inverters on a trawler or balancing dual RV setups, its isolation prevents cross-charging issues. Users in commercial fishing report fewer failures during extended trips, thanks to equalize modes that desulfate plates seasonally.
Quick Setup and Maintenance Tips
Installation is straightforward: Connect AC input to shore power, DC outputs to batteries, and select your type. Mount vertically or horizontally in dry, ventilated areas. Pro tip: Regularly inspect terminals for corrosion and use the temp sensor in hot climates to avoid undercharging. This charger shines in off-grid scenarios, maintaining readiness when generators kick in sporadically.
For longevity, avoid extreme overloads—its smart limits handle most slips, but matching amp-hour ratings ensures optimal performance.
Core Specifications at a Glance
| Attribute | Details |
|---|---|
| Output | 24V DC, 20A max per bank (3 banks) |
| Input | Universal 85-135/170-270V AC, 50/60Hz |
| Battery Types | Flooded, Gel, AGM |
| Dimensions (L x W x H) | 13.85" x 9.5" x 5" |
| Weight | Approx. 12 lbs |
| Finish | White powder coat, stainless steel |
Frequently Asked Questions
Can the Newmar PT-24-20U charge different battery types simultaneously?
Yes, its three isolated banks allow independent charging, and the selector switch lets you configure each for flooded, gel, or AGM profiles, though typically set uniformly for simplicity.
Is this charger suitable for marine environments?
Absolutely—it's ignition protected, corrosion-resistant, and built for boats, yachts, and work vessels with marinized internals handling salt air and moisture effectively.
What happens if input voltage fluctuates?
Universal input design auto-adapts from 115V to 230V with power factor correction, maintaining stable output even on unstable shore power.
Does it include temperature compensation?
An optional sensor precisely adjusts voltage based on battery temperature, preventing under- or over-charging in varying conditions like engine bays.
Can it power devices without batteries connected?
Yes, it functions as a regulated DC power supply for direct loads, useful for testing or auxiliary systems.
How do I know the charging status?
LEDs show bulk/absorption/float modes, plus an ammeter for current draw. Optional remote panels extend monitoring to dashboards.
What's the ideal battery bank size for this charger?
Optimized for 40-200 amp-hour banks per output, making it versatile for house, starting, or thruster batteries on mid-size vessels or RVs.
20 Amp Phase Three Series Battery Charger, 24 VDC, White FinishThe "Smart" Charger for Almost Any ApplicationPhase Three "Smart" battery charging technology allows you to select the right size, features and flexibility you require for virtually any application from small recreational craft to large live-aboards, workboats and other commercial vessels. These chargers interact with batteries to put them through the optimum three stage charge process which provides for fastest recovery and ideal conditioning, maximizing battery performance and extending battery life.A selector switch adjusts output voltage to adapt for gel-cell/flooded lead-acid/AGM battery types. An optional temperature compensation sensor also adjusts output for ideal voltage based on changes in the batteries' ambient temperature. All models are housed in a rugged stainless steel case with choice of a natural or durable white powder coated finish, and the internal circuitry is polyurethane coated for maximum corrosion resistance.
NewMar PT2420U Attributes
- Number Of Banks: 3
- Application: Flooded, Gel, AGM
- Output Voltage: 24 Volt
- Input Voltage: 115 To 230 Volt
- Ampere Rating: 20 Amp Charging
- Universality: Fully Universal
- Length (IN): 13.85 Inch
- Width (IN): 9-1/2 Inch
- Height (IN): 5 Inch
NewMar PT2420U Features & Benefits
- Smart circuitry provides three stage charging--bulk, absorption, float.
- Multiple isolated output banks; ammeter indicates total output current.
- Optional sensor adjusts output voltage based on battery temperature.
- Current limiting-prevents damage from overloading.
- Charger status clearly displayed with L.E.D., ammeter, or optional remote panel.
- Use as a power supply; can power loads without a battery in line.
- Optional drip shield and marinized internal circuitry.
- Numerous Safety and EMC Compliances
- Limited Two year parts and labor warranty
Three Stage "Smart" Chargers
Phase Three "Smart" battery charging technology is now available in a wide range of power levels, allowing you to select the right size, features and flexibility you require for virtually any application from small recreational craft to large live-aboards, workboats and other commercial vessels. These chargers interact with batteries to put them through the optimum three stage charge process which provides for fastest recovery and ideal conditioning, maximizing battery performance and extending battery life.
A selector switch adjusts output voltage to adapt for gel-cell/flooded lead-acid/AGM battery types. An optional temperature compensation sensor also adjusts output for ideal voltage based on changes in the batteries' ambient temperature. All models are housed in a rugged stainless steel case with a durable white powder coat finish, and the internal circuitry is polyurethane coated for maximum corrosion resistance.
Features
-
"Smart" circuitry provides three stage charging?bulk, absorption, float.
-
Wide model range covers battery system ratings from 14-950 amp-hours
-
Gel-Cell/Flooded Lead-acid/AGM battery type switch selects optimum charge/float voltages.
-
Multiple isolated output banks; ammeter indicates total output current. (except PT-7)
-
Optional sensor adjusts output voltage based on battery temperature. (except PT-7)
-
Current limiting-prevents damage from overloading.
-
Charger status clearly displayed with L.E.D. and/or audible indicators or optional remote panel.
-
Use as a power supply; can power loads without a battery in line.
-
Built to last?rugged stainless steel case with a durable white powder coat finish with an optional drip shield and marinized internal circuitry.
-
Numerous Safety and EMC CompliancesTwo year parts and labor warranty
Models
| 12 Volt | 24 Volt | 32 Volt |
| PT-7 | PT-24-8W | PT-32-25W |
| PT-14W | PT-24-13W | |
| PT-25W | PT-24-20U | |
| PT-40U | PT-24-45U | |
| PT-80 | PT-24-60W | |
| PT-24-95U | ||
| Detailed specifications below. | ||
Specifications
| 12 Volt Models | PT-7 | PT-14W | PT-25W | PT-40W | PT-80 |
| Input VAC (50-60 Hz.) | 88-132 or | 85-264 | 90-132 or | 85-135 or | 90-264 |
| Input Amps @ Full Load | |||||
| @ 115 VAC | 2 | 2.8 | 6.5 | 8.5 | 12 |
| @ 230 VAC | 1 | 1.4 | 4 | 4.3 | 7 |
| P.F. Rating | >.65 | .93@230V | .7 | .7 | .95@230V |
| Max Output Amps | 7 | 14 | 25 | 40 | 80 |
| Output Banks | 2 | 3 | 3 | 3 | 3 |
| Battery Capacity (Amp-Hours) | 14-70 | 28-140 | 50-250 | 80-400 | 160-800 |
| Operating Temp. | T-1 | T-2 | T-4 | T-5 | T-7 |
| Case Size Ref. | A-1 | A-2 | A-2 | A-3 | A-5 |
| Weight; Lbs./Kg. | 3.2/1.5 | 8/4 | 8.2/4 | 12/6 | 15.2/7 |
| Optional Temp.Sensor Model | N/A | TCS-12/24 | TCS-12/24 | TCS-12/24 | TCS-12/24 |
| Remote Panel Model | N/A | RP | RP | RP | RP |
| Equalize Option | No | Yes | Yes | Yes | Yes |
| Output Indicator Ref. | M-1 | M-3 | M-3 | M-3 | M-3 |
| Compliance Ref. | CG, CE | CG, CE | CG | CG, CE | CE |
| 24 Volt Models | PT-24-8W | PT-24-13W | PT-24-20U | PT-24-45U | PT-24-60W | PT-24-95U |
| Input VAC (50-60 Hz.) | 85-264 | 90-132 or | 85-135 or | 90-264 | 207-253 | 90-264 |
| Input Amps @ Full Load | ||||||
| @ 115 VAC | 2.8 | 6.5 | 8.5 | 12 | NA | 26 |
| @ 230 VAC | 1.4 | 4 | 4.3 | 7 | 13 | 14 |
| P.F. Rating | .93@230V | .7 | .7 | .95@230V | .7 | .95@230V |
| Max Output Amps | 8 | 13 | 20 | 45 | 60 | 95 |
| Output Banks | 3 | 3 | 3 | 3 | 3 | 3 |
| Battery Capacity (Amp-Hours) | 16-80 | 26-130 | 40-200 | 90-450 | 120-600 | 180-950 |
| Operating Temp. | T-2 | T-3 | T-5 | T-8 | T-6 | T-8 |
| Case Size Ref. | A-2 | A-2 | A-3 | A-5 | A-6 | A-6 |
| Weight; Lbs./Kg. | 8/4 | 8.2/4 | 12/6 | 12.2/6 | 24.1/11 | 24.5/11 |
| Optional Temp.Sensor Model | TCS-12/24 | TCS-12/24 | TCS-12/24 | TCS-12/24 | TP | TCS-12/24 |
| Remote Panel Model | RP | RP | RP | RP | N/A | RP |
| Equalize Option | Yes | Yes | Yes | Yes | No | Yes |
| Output Indicator Ref. | M-3 | M-3 | M-3 | M-3 | M-2 | M-3 |
| Compliance Ref. | CG, CE | CG | CG, CE | EN, CE | EN, CE | EN, CE |
| 32 Volt Model | PT-32-25W |
| Input VAC (50-60 Hz.) | 104-126 |
| Input Amps @ Full Load | |
| @ 115 VAC | 15 |
| @ 230 VAC | N/A |
| P.F. Rating | .7 |
| Max Output Amps | 25 |
| Output Banks | 3 |
| Battery Capacity (Amp-Hours) | 50-250 |
| Operating Temp. | T-6 |
| Case Size Ref. | A-4 |
| Weight; Lbs./Kg. | 12.2/6 |
| Optional Temp.Sensor Model | TP |
| Remote Panel Model | N/A |
| Equalize Option | No |
| Output Indicator Ref. | M-2 |
| Compliance Ref. | EN, CE |
Case Size
| Inches | Centimeters | |||||
| Ref | H | W | D | H | W | D |
| A-1 | 10.5 | 5.0 | 2.8 | 26.7 | 12.7 | 7.1 |
| A-2 | 12.5 | 7.7 | 4.3 | 31.8 | 19.6 | 10.9 |
| A-3 | 13.85* | 9.5 | 4.8* | 35.2* | 24.1 | 12.2* |
| A-4 | 13.8A | 9.8 | 5A | 35A | 24.9 | 12.7A |
| A-5 | 14.8B | 9.6 | 5.6B | 37.6B | 24.4 | 14.2B |
| A-6 | 17.5C | 12 | 7.2C | 44.5C | 30.5 | 18.3C |
| * Add .75" (1.9 cm) to height and 1.35" (3.4 cm) to depth | ||||||
Temperature Rating References:
| T-1 | -10°C to +45°C; Derate linearly from 100% @ 0°C to 80% @ -10°C |
| T-2 | -10°C to +60°C; Derate linearly from 100% @ 40°C to 60% @ 60°C |
| T-3 | -10°C to +60°C; Derate linearly from 100% @ 50°C to 60% @ 60°C |
| T-4 | -10°C to +60°C; Derate linearly from 100% @ 40°C to 60% @ 60°C |
| T-5 | -40°C to +60°C; Derate linearly from 100% @ 50°C to 75% @ 60°C |
| T-6 | -20°C to +50°C; Full output |
| T-7 | -20°C to +70°C; Derate linearly from 100% @ 45°C to 50% @ 70°C |
| T-8 | -20°C to +70°C; Derate linearly from 100% @ 50°C to 50% @ 70°C |
Output Indicator References
| M-1 | Total output ammeter |
| M-2 | Charge/Float L.E.D. |
| M-3 | Total output ammeter and charger status L.E.D.'s/Alarms |
Compliance References*
See matrix for applicable models
CG USCG CFR 183.410 (Ignition protected)
EN EN 60335-1, EN 60335-2-29
CE Carries the CE Mark
* Numerous other Safety and EMC compliances may also apply. Contact factory if further compliance
information is required.
Nominal Output Voltages at Gel/Flooded Switch Settings
(Without Temperature Compensation option installed or at 22.2˚C (72˚F) with Temperature
Compensation option installed.)
| | 12 Volt Models | 24 Volt Models | 32 Volt Model | |||
| Charge | Float | Charge | Float | Charge | Float | |
| Setting | @ 50% load | @ .5 amp load | @ 50% load | @ .5 amp load | @ 50% load | @ .5 amp load |
| Gel-Cell | 14.0 VDC | 13.6 VDC | 28.0 VDC | 27.2 VDC | 37.3 VDC | 36.2 VDC |
| Flooded/AGM | 14.2 VDC | 13.4 VDC | 28.4 VDC | 26.8 VDC | 37.8 VDC | 35.7 VDC |
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Newmar PT-24-20U 24v 20A Charger 115/230V Input Technical Specifications
| Type: | |
|---|---|
| Vendor: |
NewMar |
| Weight: |
17.0 lb |
Newmar PT-24-20U 24v 20A Charger 115/230V Input User Reviews
Newmar PT-24-20U 24v 20A Charger 115/230V Input Shipping & Return
| Shipping Weight: |
17.0 lb |
|---|---|
| Box Sizes: |
1.00 (h) x 1.00 (w) x 1.00 (l) |
| Cubic Feet: |
1.0 |
| Returnable: |
Yes |
| USPS First Class: |
Yes |
| P65: |
Yes |
| Truck Delivery: |
Yes |
For detailed shipping policy please check our Shipping Policy and you can find our Return and Refund Policy here.