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Description
Mastervolt Mass Combi Ultra Inverter/Charger (48V / 3500W / 50A)The Mastervolt Mass Combi Ultra combines a 3 step battery charger, able to charge a second 12v or 24v battery simultaneously, along with a heavy duty true sine wave power inverter. The unit has two AC inputs and can be connected up to shore power and generators for charging and the AC output will automatically switch between mains and inverter mode. It has two separate AC outputs, allowing critical equipment to be put on a different circuit to other
The Mastervolt Mass Combi Ultra combines a 3 step battery charger, able to charge a second 12v or 24v battery simultaneously, along with a heavy duty true sine wave power inverter. The unit has two AC inputs and can be connected up to shore power and generators for charging and the AC output will automatically switch between mains and inverter mode. It has two separate AC outputs, allowing critical equipment to be put on a different circuit to other appliances to protect them from heavy loads. The inverter/charger is built to be reliable and user friendly, and is equipped with MasterBus Combi integration for easy operation along with the rest of your Mastervolt system. The Mass Combi Ultra features the Power Assist function, which prevents main fuses or breakers being tripped in the event of a weak power supply. It also eliminates power failures and dips to maintain reliable performance. The unit is equally capable at handling heavy loads and more sensitive loads, and with a true sine wave output will not cause harm or damage to your appliances. The high frequency technology used eliminates noise typically associated with power inverters, such as buzzing or humming. This unit can provide up to 50% of charging current or inverter capacity without using any fan cooling, and so runs very quietly. Even when operating at maximum capacity, or performing in high ambient temperatures, the fan speed is regulated to only run in a linear way, meaning it wont spin too fast or make unnecessary noises. This model can be used in a 3 phase system, or you can combine up to 10 units in parallel for higher power outputs. Specifications sine wave inverter Nominal DC voltage: 48 V (38-62 V) Output voltage: 180-260 V, adjustable Output frequency: 50/60 Hz (� 0.005 %), configurable Output waveform: true sine Continuous power at 40 C / 104 F, cos phi 1: 3500 W Max. peak load: 7000 W Max. efficiency: �� 93 % Max. ripple on DC (battery at full load): 5 % No-load power consumption on DC (ON/inverter OFF/OFF): 26 W / 4 W / 0 W Energy saving mode consumption: 7 W Parallel configuration: yes, up to 10 units (for larger systems, an external transfer system is required) 3-Phase configuration: yes, up to 3x3 Synchronise with mains/generator: yes Specifications battery charger Input voltage range: 184-275 V Max. input current: 16 A Max. charge current at 40 C / 104 F: 50 A at 57 V, adjustable Secondary charger output voltage: 12/24 V selectable Secondary charger output current: 10 A Battery temperature sensor: yes, included Battery voltage sense: through MasterShunt, otherwise automatic compensation Specifications transfer system AC input (generator): 50 A (switched) AC input: 30 A (switched) AC output 1: 67 A AC output 2: 50 A (switched) AC input fuse: no Transfer speed: seamless ( 1 ms) Transfer voltage range: 184-275 V, adjustable Transfer frequency range: 35-68 Hz, adjustable General specifications Galvanisedanic isolation: yes Display/read-out: LED display Dimensions, hxwxd: 472 x 318 x 178mm (18.6 x 12.5 x 7.0 inch) Weight: 15.3 kg (33.7 lb) Compliance: CE, E-mark, ABYC, RMRS Technical specifications Charge characteristic: IUoUo, automatic / 3-step+ for Gel/AGM/MLI/ flooded/spiral/traction Recommended battery capacity: ~ 100-300 Ah (based on gel batteries, may differ for other types) Ground relay: yes, configurable Temperature range (ambient temp.): -25 C to 60 C, derating > 40 C (-13 F to 140 F) Cooling: vario fan Protection degree: IP23 (vertical mounting) Safety class: IEC protection class I Humidity protection: conformal coating, max. 95 % relative humidity, non condensing Protections: over temperature, overload, short circuit, high/low battery voltage Power Assist: yes MasterBus compatible: yesShipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 19 reviews
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Product Reviews
★★★★★ 4
Fairly Priced and Fairly Nice iPad Pro Case
Color: Light Pink
I was on the hunt for a case for my iPad Pro (6th generation), and let me tell you, it was a wild ride! I scoured every review I could find, but it was like trying to find a needle in a haystack. The ones that were reasonably priced had all sorts of issues, and the ones that looked fancy were way too expensive and had just as many problems.
Now, I know what you might be thinking: “You get what you pay for, right?” Well, I was determined to find a case that fit my budget and didn’t have too many complaints. After hours of searching, I finally stumbled upon a case that seemed to be a reasonable match.
Here’s why I picked this one: It has most of the features I wanted. It covers the lens on the back of the iPad, and there’s a holder on top for the pencil allowing it to charge. I’ve gone through two cases before, and they all started to wear out pretty quickly. I didn’t want to spend a fortune on another case that would just fall apart so I found this one to be reasonably priced. The case itself is nice and sturdy, and it’s a great fit for my iPad.
I charged the keyboard for the recommended 5 hours before I first used it, and I haven’t had a chance to test the battery life yet. But after charging, it was a breeze to connect it to my iPad.
A little heads up: the connect button is actually the “C” on the keyboard, not the command or control key. I know, I know, confusing! But once you press the keys, Bluetooth turns on, and connection to the iPad went without any issues.
I’ve seen some reviews mentioning that special characters weren’t working or that the keyboard would just stop working randomly. But so far, everything seems to be working perfectly. I’ll definitely update this review if anything changes.
One thing I really like about this keyboard case is that once it’s connected, you don’t have to reconnect it again. That’s a huge plus! Another cool feature is that the instructions for pairing and using the keyboard are right on the bottom of the keyboard, which is super handy.
Pros:
- style and fit.
- different angles for propping iPad while typing or watching videos
- instructions for pairing and use on the bottom of the keyboard,
Cons:
- The only downside I’ve found so far is that you can’t swivel the iPad from landscape to portrait because the case doesn’t allow for that movement. For me this is a minor inconvenience, because I just close the case and turn it to portrait. If that’s important to you, then this might not be the case for you. Another thing I have noticed is that sometime while I am typing, and I type fast, I will hit something and get dragged somewhere else on the screen. I think this is a user inspired issue, but it is not that big a deal for me.
Overall, this is a good functional case with a pretty good keyboard and iPad protection. I’m giving it 4 stars explained below.
My Stars Explained
5 - Like finding money in your old coat pocket - pure joy!
4 - Almost perfect - like a pizza with just one missing topping.
3 - Like a movie that’s just okay—neither a blockbuster nor a total flop
2 - Like a blind date that went horribly wrong - cringeworthy.
1 - Like stepping on a Lego in the dark - painful.
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Reviewed in the United States on October 22, 2025
★★★★★ 5
Love this case!
Color: Light Pink
This is an awesome case! Fits perfectly and love the color. Sturdy and does the job! Will be great for college!
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Perfect fit, secure pencil slot, great touchpad.
Color: Navy Blue
EXCELLENT Keyboard case. I tried several to find the right one. Tried a bluetooth keyboard by itself, but there wasn't the convenience of an "all in one". Tried another one that had a magnetic connection between the ipad and the keyboard, but the ipad was not as positionable as I needed it to be. This "folio-type" case is similar to what I use for all my other tablets and devices - slim, securely closing, perfectly fitting my 3rd gen ipad pro - AND the slot for the apple pencil is PERFECTION! The touchpad is a little stiffer than I like but then I realized I DON'T actually have to press it to use it - just a tap accomplishes the same thing. I rely on the touchpad for a lot and this case is just really exactly what I need.
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Reviewed in the United States on February 27, 2026
★★★★★ 5
good value and battery life
Color: Purple
Love this!! the keyboard has a good life on it and charges pretty fast. I at first didn't really like that it detaches, but being able to hold the keyboard in my lap and type on the screen while I sit on the sofa is actually pretty nice. the trackpad does have a bit of a learning curve, but gestures/hotkeys are all listed on the bottom so it's easy to check whenever necessary.
The material of the case itself also cleans really easy. I spilled a drink on it and it wiped right off. I feel like this is a pretty good value all things considered, especially when similar products at big box stores can eb a couple hudnred bucks.
The only downside is that the keyboard, while slim, does add a bit of bulk to the case. It's not a huge deal for me, but my boyfriend who also has an ipad did notice the difference immediately.
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Reviewed in the United States on April 20, 2026
★★★★★ 3
Works
Color: Light Gray
Heavy! It is a nice case and the keyboard works good. Turns off randomly, but not too annoying. This case is heavy though! It at least triples the weight of my iPad, which is opposite the reason I got an iPad Air. Too late to return, I just take the keyboard out, but it must be the magnets in the case that are so heavy.
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Reviewed in the United States on February 5, 2026
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