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12V Inverter Charger with Transfer Switch · RS-V3P12C
Shore power, generator, or battery — the NOVA SUPERCHARGER 3K switches between them automatically, in as little as 20 milliseconds. Built around a 3000W pure sine wave inverter and a genuinely heavy-duty 150A battery charger, it's designed for rigs and vessels that need real charging power, not just a pass-through switch.
The NOVA SUPERCHARGER 3K combines an inverter, a battery charger, and an automatic transfer switch into a single 12V unit. Plug into shore power at a marina or campground, run a generator when you're off-grid, or draw straight from the battery bank — the unit handles the switching itself, so the loads onboard never notice a change in source.
This is an AC-charging unit rather than a solar hybrid inverter: it doesn't include an MPPT solar charge controller, so it's built specifically around fast, high-current charging from shore power or a generator rather than solar input.
A built-in transfer switch means there's no separate box to wire in and no manual flip required when the power source changes. The NOVA SUPERCHARGER 3K detects when shore power or a generator is available and switches to it automatically in as little as 20 milliseconds — fast enough that most onboard electronics never register the transition.
Where many inverter/chargers top out at 50–80A, the NOVA SUPERCHARGER 3K supports up to 150A of charging current, selectable in 5A increments to match the battery bank being charged. That headroom means less time waiting between trips or outages for a large 12V bank to top back up — and it's compatible with deep-cycle, AGM, and LiFePO4 batteries with a BMS, so it fits into most existing 12V systems without a battery swap.
A 3000W continuous rating with 6000W of surge capacity for five seconds covers the startup draw of compressors and motors that spike well above their running wattage. With total harmonic distortion under 5%, the output is clean enough for laptops, navigation electronics, and other equipment that's sensitive to waveform quality — not just the appliances that tolerate rougher power.
| Specification | 2K | 3K (This Product) |
|---|---|---|
| Rated power | 2,000 W | 3,000 W |
| Surge power (5s) | 4,000 W | 6,000 W |
| Max. battery charger | 80 A | 150 A |
| Rated power | 3,000 W |
| Surge power (5s) | 6,000 W |
| Nominal voltage (input/output) | 120VAC |
| Input voltage range | 100–130VAC |
| Input frequency | 50/60Hz (selectable) |
| Total harmonic distortion | < 5% |
| Output voltage regulation | 120VAC ±5% (battery mode) |
| Output frequency | 50Hz or 60Hz (±1%) |
| Peak efficiency | 91% |
| Battery charger current | 5–150A (selectable) |
| Dimensions | 15.4 × 12.0 × 4.8 in |
| Weight | 18.5 lbs |
No. This is an AC-charging inverter/charger built around shore power, generator input, and battery — it does not include a built-in MPPT solar charge controller.
It works with 12V deep-cycle, AGM, and LiFePO4 batteries, including LiFePO4 packs with a BMS.
The low-voltage cutoff is adjustable between 10.5V and 12.8V, letting it be tuned to protect different battery chemistries from over-discharge.
The 3K steps up rated power from 2,000W to 3,000W, surge power from 4,000W to 6,000W, and max battery charging current from 80A to 150A.
So far I love these nova supercharger inverters, we installed 2 3k12 units and they will pass thru 50amps each and invert 3000 watts continuous each to power a pair of Coleman 15k a/c with easy starts installed with power left over. Glad I went with these even though I couldn’t find hardly any reviews or installs online.
They are perfect for the front compartment on our fifth wheel camper!
Going to ditch the 5k generator we have been lugging around the past couple of years now!
Fast shipping...
(Review from richsolar.com)
The hardest part was placement in my 2019 GD 2250rk. Install was easy.
To my surprise, it operates my rv a/c unit and the rv refrigerator.
I have 5 12v 100ah lithium batteries. For solar I'm using 400w panel with a 60amp charge controller. Everything is is working just fine. Very happy with my purchase.
(Review from richsolar.com)
Built my kid a motocross trailer. 12v 3000w inverter worls great. Runs my grill, iduction cooker, fans, charges bikes, tv, lights anything you can think of. Charges my 628ah 12v battery without issues and always proper voltages. Would recommend to anyone with one expection.
My only issue is the screen scratches so incredibly easy its impossible to clean without extreme care. Mines horrible from simply wiping a cloth over it to remove dust one time.
(Review from richsolar.com)
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