Imagine heading out on the water, only to find your starting battery sluggish or your house bank drained from overnight electronics. That’s where the Newmar PT7 steps in as your reliable 12V powerhouse. This compact 7-amp, 2-bank charger delivers smart, three-stage charging tailored for the harsh marine environment, ensuring your batteries recover quickly, perform at their peak, and last seasons longer. Unlike basic chargers that overcharge or underperform, the PT7’s intelligent circuitry handles everything from bulk recovery to gentle float maintenance, preventing sulfation and extending life.
Boat owners rave about its simplicity—flip a switch for gel-cell, flooded lead-acid, or AGM batteries, and let it do the work. Whether you’re running trolling motors, bilge pumps, or nav systems, this charger keeps you powered without the guesswork.
The Science of Three-Stage Smart Charging
The PT7 employs Phase Three technology: bulk stage floods the battery with maximum current for fast recharge; absorption tops it off at precise voltage to avoid gassing; and float maintains readiness without trickle waste. This process optimizes performance for batteries rated 14-70 amp-hours, perfect for smaller vessels like fishing boats, pontoons, or sailboats.
Recovers deeply discharged batteries up to 50% faster than single-stage units
Prevents overcharging that shortens battery lifespan
Current limiting protects against overloads, even if connected directly to loads
Pro tip: Pair it with your alternator for seamless shore power backup—many users report fewer dead batteries after long idle periods.
Battery Versatility at Your Fingertips
No more fumbling with incompatible chargers. A simple selector switch adjusts output for:
Gel-cell: 14.0V charge / 13.6V float
Flooded lead-acid or AGM: 14.2V charge / 13.4V float
Ideal for mixed bank setups common on weekend cruisers. It doubles as a power supply sans battery, keeping DC loads humming during AC outages.
Built to Withstand the Elements
Crafted for saltwater pros, the PT7 features a rugged stainless steel chassis with white powder coat finish and polyurethane-coated internals for ultimate corrosion resistance. At just 3.2 lbs and A-1 case size (10.5″ H x 5″ W x 2.8″ D), it tucks neatly into tight engine compartments.
Operates from -10°C to +45°C (derate below 0°C)
Universal AC input: 88-132VAC or 176-264VAC (auto-ranging options)
LED indicators show charge status; total output ammeter for at-a-glance monitoring
Meets USCG ignition protection and CE standards for safety
Users in humid tropics or foggy coasts confirm it shrugs off moisture better than plastic competitors.
PT7 Specifications at a Glance
Specification
PT-7 Details
Input Voltage (50-60Hz)
88-132 or 176-264 VAC
Input Amps @ Full Load
2A @115VAC / 1A @230VAC
Max Output Amps
7A
Output Banks
2 Isolated
Battery Capacity
14-70 Ah
Weight
3.2 lbs / 1.5 kg
Compliance
USCG, CE
*Dimensions include mounting flanges; full derating details available in technical refs.
Simple Setup for Lasting Results
Installation is straightforward: Connect AC input, wire to your two banks (positive/negative per bank), set battery type, and plug in. Mount vertically or horizontally in a dry, ventilated spot. Monitor via onboard ammeter—no remote needed for this model. For best results, disconnect loads during initial bulk charge and check terminals quarterly for corrosion.
Real-world tweak: Many rig it with an inline fuse for extra protection in rough seas.
Perfect for Your Vessel
From center consoles to cabin cruisers, the PT7 shines where space is premium and reliability is non-negotiable. It’s a step up from automotive chargers, with isolated banks preventing cross-charging issues in dual-battery setups.
Why Boaters Trust the Newmar PT7
Beyond specs, it’s the peace of mind—two-year warranty, proven in commercial fleets, and designed by power experts who understand boating’s demands. Skip the cheap imports that fail mid-trip; invest in gear that starts every time.
Frequently Asked Questions
What battery types does the Newmar PT7 support?
It works with gel-cell, flooded lead-acid, and AGM batteries via a simple selector switch, optimizing voltages for each type.
Can the PT7 charge two separate battery banks?
Yes, its two isolated banks allow independent charging of starting and house batteries without cross-interference.
Is the PT7 suitable for marine use?
Absolutely—marine-grade stainless steel construction, corrosion-resistant coatings, and USCG ignition protection make it ideal for boats.
Does it have temperature compensation?
The PT7 model does not include a temp sensor option, but it performs reliably in its rated temperature range.
How do I know when charging is complete?
LED indicators and a total output ammeter show bulk, absorption, and float stages clearly.
Can it power devices without a battery?
Yes, it functions as a stable DC power supply for loads up to 7 amps directly.
What AC voltages does it accept?
88-132VAC or 176-264VAC (50-60Hz), making it versatile for global shore power.
