Comvolt makes three 12V LiFePO4 power stations, and on paper they look like small, medium and large. They aren't quite that. The 2200 and 4200 have the same inverter and charging ratings and differ mainly in battery size. The 6000 Pro is a different machine, with a bigger inverter, a second solar input and a second Anderson output. Here's how they compare, and which suits which kind of RV, van or trailer.
Side by side
| Comvolt 2200 | Comvolt 4200 | Comvolt 6000 Pro | |
|---|---|---|---|
| Capacity | 2,201Wh (12V 172Ah) | 4,200Wh (12V 328Ah) | 6,016Wh (12.8V 470Ah) |
| Battery | LiFePO4, 12.8V nominal (11.5–14.2V), self-heating for low-temperature charging | ||
| Inverter (sustained / nominal / peak) | 1,600W / 1,800W / 3,600W | 1,600W / 1,800W / 3,600W | 2,500W / 3,000W / 6,000W |
| 120V AC | 2 outlets (10A max) | 2 outlets (10A max) plus an L/N/GND terminal block | 2 × 10A outlets and 1 × 15A outlet; AC-PDU connecting cable in the box |
| 12V outputs | 2 × 12V socket (10A max each), 120A Anderson | 2 × 12V socket (10A max each), 120A Anderson | 2 × 12V socket (10A max each), 2 × 120A Anderson with circuit breakers |
| USB | USB-A and USB-C, 18W max each | ||
| Solar input | 1 × XT60, 20–45V, 400W max | 1 × XT60, 20–45V, 400W max | 2 × XT60, 400W max each (800W total) |
| Wall charger | 500W, included | 500W, included | Wall charger cable in the box; wattage not stated |
| Alternator charging | 30A DC-DC charger included | ||
| Weight | 43.4 lb | 65.5 lb | 122 lb |
| Size | 14.5 × 7.3 × 9.7 in | 17.2 × 7.3 × 10.1 in | 18.5 × 9.7 × 13.5 in |
| Part number | 12V2200PPS | 12V4200PPS | Comvolt6000prom |
All three use the same 12V layout and monitoring. Each has a screen showing state of charge, power in and out and inverter status, connects to the Comvolt app over Bluetooth, and has an RS-485 port for Comvolt's displays and expansion batteries.
Comvolt 2200: the van and weekend station
The Comvolt 2200 is the lightest of the three, at 43.4 lb. Its 2,201Wh suits a camper van, truck camper or small trailer that runs a 12V fridge, lights, a fan and devices, with solar or driving to top it up. Its inverter has the same ratings as the 4200's, so stepping down from the 4200 costs you battery, not 120V power.
Pick it if space and weight matter more than days off-grid, or if you mostly camp for a night or two between drives. The included 30A DC-DC charger does most of the work in a van that moves every day.
Comvolt 4200: the same ratings with about twice the battery
The Comvolt 4200 keeps the 2200's inverter ratings, 400W solar input, 500W wall charger and 30A DC-DC charger, and nearly doubles the battery to 4,200Wh. That costs 2.7 inches of length, 0.4 inches of height and 22 lb. It also adds an L/N/GND AC terminal block next to its two outlets, which suits a hard-wired 120V circuit.
Pick it for a travel trailer or a van that boondocks for several days, especially when most of the load is 12V. The one thing it doesn't add is solar input: it still takes 400W, so in a long, sunny stay the 6000 Pro's second input can matter more than the extra battery.
Comvolt 6000 Pro: the one for 120V heavy loads
The Comvolt 6000 Pro is the station to look at if you want to cook on 120V or run a 120V rooftop air conditioner off-grid. It's rated 2,500W sustained, 3,000W nominal and 6,000W peak, adds a 15A outlet alongside two 10A outlets, and has two 120A Anderson outputs with their own breakers.
Its two XT60 inputs are rated 400W each, against the single 400W input on the 2200 and 4200. It also has a 5W LED light. It also ships with the AC-PDU connecting cable for Comvolt's AC power distribution unit, which makes it the natural core of a full Magic Power system.
At 122 lb and 18.5 × 9.7 × 13.5 in, it's a fixed install, not something you carry to a picnic table. Plan the spot and the lift before it arrives.
Adding an expansion battery later
Any of the three can grow. Comvolt's two expansion batteries plug into the station's rear Anderson port with the supplied cable, with an RJ45 link so the station and pack share status:
- Comvolt 4000 Expansion Battery: 12V 320Ah, 68.4 lb, 13.7 × 7.7 × 10.1 in, no screen.
- Comvolt 6000 Expansion Battery: 6,016Wh (12V 470Ah), 95 lb, 18.9 × 7.4 × 11.3 in, with an LCD that shows state of charge, voltage, current, temperature and cell voltages.
Neither pack has an inverter or outlets; they're extra storage for the station they're connected to. Comvolt doesn't publish a maximum number of packs per station, so talk to us before planning a big bank. If you're between two stations, the smaller one plus a pack later is a reasonable path, but remember that a pack adds battery, not solar input or inverter power.
Which one should you buy?
- Mostly 12V loads, one or two nights between drives: 2200.
- Mostly 12V loads, several days parked: 4200.
- 120V cooking or air conditioning, or long sunny stays: 6000 Pro.
To work out your own daily number, see sizing a Comvolt station as an RV house battery.
FAQ
Is the 4200 just a bigger 2200?
Very nearly. Comvolt lists the same inverter, solar, charging, port and temperature figures for both, and the 4200 adds an AC terminal block. What you're paying for is the larger battery.
Which Comvolt runs an RV air conditioner?
For a 120V rooftop unit, the 6000 Pro, because of its 2,500W sustained rating and 6,000W peak. Check the unit's running and starting draw first. A 12V DC air conditioner can run from the 120A Anderson output of any of the three.
Do they all charge while I drive?
Yes. Each includes a 30A DC-DC charger that wires to the vehicle battery and plugs into the station's XT90 input.
What about warranty and shipping?
Comvolt covers its batteries and power stations for 5 years. The stations ship from our warehouse in Upland, California, to the lower 48 states only, because they're lithium.
Browse the full Comvolt range, or ask us which one fits your rig.