Pay in installments of $667.75 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 2 - Sep 7
For Your Every Summer RSVP, with Code: SUMMER15
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
4.6 ★★★★★
Based on 22 reviews
Sort
Product Reviews
★★★★★ 5
Take pictures of product pieces in the carton. Assemble where you have room to lay each piece out.
Size: 8 cube, Size: 8 cube
This is a great product, and easy to assemble. The directions were straightforward. Only snag was getting pieces to line up, but able to figure it out. Good tools included.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 17, 2026
★★★★★ 4
Cute storage shelf.
Size: 12 cube
This is particle board, as expected for the price. Instructions were easy to follow. I assembled it alone but there was one step that would have been easier with 2 people. I have a better Allen wrench attachment than the one included and it saved my fingers a lot of pain. It's cute when assembled. The openings are 10.5x10.5x11 inches so 11x11x11 inch baskets don't fit but you can find 10.5 inch baskets that work. It's very sturdy and the way it's constructed, the shelves shouldn't ever droop. It's a good value for the money. It's perfect for my sewing room.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 5
Love
Size: 8 cube
Easy to put together and follow along with directions. All the nuts ,bolts, screws etc are all in their own pouch and labeled.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 23, 2026
★★★★★ 3
Hard to assemble but cute
Size: 8 cube
Very cute shelf but very hard to assemble!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 7, 2026
★★★★★ 4
Smaller than expected.
Size: 8 cube
The directions were complicated with only image directions. One person can put this together. It took me about an hour. The item is smaller than I expected. The image is misleading. Definitely not waist high for an adult. More like thigh height. Guess I should have paid more attention to the measurements instead of the image. It looks nice when assembled. For the price I expected something taller.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026