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The Go Power! 75 Amp Smart Converter Battery Charger (model GPC-75-MAX) turns 120V AC into 12V DC and has a built-in three-stage smart charger. When your RV is plugged into shore power or a generator, it runs 12-volt lights, fans, the water pump, the furnace blower and electronics while it charges the house battery, up to 75 amps continuous combined.
Go Power sizes the 75 amp model for fifth wheels and motorhomes with larger battery banks. Its switch-mode design weighs 8 lb and runs at better than 85% typical efficiency.
The GPC-75-MAX delivers up to 75 amps, or 1095 watts, of continuous 12V DC output, shared between the loads you run and the battery you charge.
Boost at 14.6V brings a good, drained battery back to full voltage quickly. Normal at 13.6V finishes the charge at a safe rate and runs your 12V lighting and appliances. Storage at 13.2V keeps the battery fresh while loads sit idle and keeps gassing to a minimum. The charger switches stages on its own.
The charger ships in 3 Stage mode for lead-acid batteries. For lithium, move Switch A to Fixed Output, turn Switch B to set the boost voltage anywhere from 13 to 16.5 VDC, then return Switch A to 3 Stage.
The GPC-75-MAX protects against reverse battery polarity, brown-out input, short circuits, overload and over-temperature. Over-current protection combines cycle-by-cycle peak limiting with rated current limiting. If a battery is connected backward, replaceable fuses on the DC output blow to protect the unit.
Fan speed follows the converter's internal temperature, so the fan ramps up and down slowly instead of snapping on and off. That keeps fan-starting noise to a minimum.
Fifth wheels and motorhomes. Run a busy 12V system and recharge a larger house battery bank whenever you plug in.
Converter replacement. Swap in the GPC-75-MAX for an existing converter rated 75 amps or less, with three-stage charging and an adjustable boost voltage built in.
Generator charging. Plug into a generator's grounded 120V outlet to power 12V loads and recharge the battery at camp.
Both use the same 7.8 x 9.5 x 3.5 inch housing, charging stages, adjustable range and protection features. The GPC-75-MAX delivers 75 amps (1095 watts) continuous and draws up to 13 amps AC at 108V. The GPC-100-MAX delivers 100 amps (1460 watts) and draws up to 15 amps. Step up to the GPC-100-MAX if your 12V loads plus battery charging need more than 75 amps.
A single-voltage converter holds one output voltage all the time. The GPC-75-MAX moves between Boost, Normal and Storage on its own, using a higher boost voltage to bring a drained battery back quickly and a lower storage voltage to keep it fresh while loads sit idle.
Go Power's guidance is to match or exceed your existing converter's rating. Then allow roughly 10 to 20% of your battery bank's amp-hours as charge current, plus your typical 12V load. Go Power notes that larger banks and motorhomes usually need the 75 or 100 amp model.
Plug the AC cord into a 120V, three-wire grounded source. The GPC-75-MAX draws up to 13 amps at 108V AC. Size the DC wire for the converter's amperage, put a breaker within 18 inches of the battery, and connect the chassis bonding lug to the vehicle chassis. Leave at least 1 inch of free air space at each end and room above and below. Keep it away from rain, spray and dust, and out of any compartment with batteries, gasoline or other flammable items. The working range is 0 to 45°C.
Yes. Use the manual's Fixed Output steps and a multimeter to set the boost voltage to your lithium battery's recommended charge voltage. The new voltage may only take effect after one full charge cycle. Check your battery maker's specifications first to confirm the GPC MAX will work with it.
The reverse polarity fuses on the DC output blow to protect the converter. Correct the wiring, loosen the screws and replace the fuses with the same type and rating. Tighten them firmly, but don't overtighten.
Go Power covers the GPC-75-MAX with a 2-year limited warranty for the original end user, from the date of purchase, against defects in materials and workmanship.
The Go Power! 75 Amp Smart Converter Battery Charger runs your 12V system and charges your battery with automatic three-stage charging, an adjustable boost voltage for lithium and built-in protection, all in a compact 8 lb housing. If you'd like help choosing the right size or planning the wiring, the Outbound Power team is happy to help.
Go Power! 75 Amp Smart Converter Battery Charger Specifications |
|
|---|---|
| Model | GPC-75-MAX |
| Input | |
| Input Voltage | 105-135 V AC |
| Input Frequency | 47-63 Hz |
| Max AC Current at 108 V AC | 13 A |
| Max Inrush Current, Single Cycle | 40 A |
| AC Source | 120 V, 3-wire grounded |
| Output | |
| Output Current, Max Continuous | 75 A |
| Output Power, Continuous | 1095 W |
| DC Output Voltage (No Load) | 13-16.5 V DC, adjustable |
| Output Voltage Tolerance (No Load) | ±0.7% |
| Battery Banks | 1 |
| Typical Efficiency | >85% |
| Charging | |
| Charge Modes | 3 Stage (factory setting), Fixed Output |
| Boost Stage | 14.6 V |
| Normal Stage | 13.6 V |
| Storage Stage | 13.2 V |
| Boost Voltage Adjustment | 13-16.5 V DC |
| Protection | |
| Short Circuit | Yes |
| Overload | >100% |
| Thermal | Yes |
| Reverse Battery Polarity | Yes, replaceable DC output fuses |
| Brown-Out Input | Yes |
| Over-Current | Cycle-by-cycle peak limiting and rated current limiting |
| Fan Control | Proportional |
| Installation | |
| DC Connection | Positive and negative terminal lugs |
| Grounding | Chassis bonding lug |
| Battery Breaker | Within 18 in of the battery |
| Ventilation Clearance | 1 in minimum free air space at each end |
| Physical | |
| Dimensions | 7.8 x 9.5 x 3.5 in |
| Weight | 8 lb |
| Working Temperature | 0-45 °C |
| Warranty | |
| Warranty | 2 years, limited |
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