Mastervolt Mass Combi Ultra 24V/3500W - 100A - 230V [38023500]
Get it between June 09 and June 11.
Low in stock
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At MarineXGear, we are proud to have the best refund and return policies in the industry. If you’re not satisfied with your purchase for any reason, you may return it to us within 30 days for a refund.
If you have a problem with our order (there are missing components, damages, or the product is not functioning), please reach out to us as quickly as possible. Some of the problems can be resolved by going through the product manual or the product FAQs.
Refer to our Refunds & Return Policy for more details.
Order Processing
Once we receive your order, we will send you a confirmation email. Then we will process the order by confirming that the product is in stock and ready for shipment. If any of the items in your order are back-ordered, we will reach to you via email or phone and you may choose to either wait or receive a 100% refund.
Please allow 1-3 days for processing your order.
Shipping
We ship to the lower 48 continental United States only at this time.
Shipping times and shipping method will depend on the specific product and brand you purchase. If you have any shipping question, feel free to ask on the chat or email us at info@marinexgear.com.
We will send tracking information by email the same day the shipping tracking number is created/available.
Before you sign the shipping bill, please THOROUGHLY INSPECT YOUR ITEM. Signing for the receipt of a damaged product removes the liability of the shipping company and MarineXGear. Once you accept your shipment as non-damage, your item is your property.
Mass Combi Ultra 24V/3500W - 100A - 230V
The Mass Combi Ultra series comprises several models, varying from 3000 W to 3500 W. For higher capacities up to 35 kW the Combi Ultra can be used in parallel or 3-phase configurations. An efficient and integrated solar charge regulator helps make the most of your solar panels.
The Mass Combi Ultra is equipped with the latest technologies. The new inverter technology ensures a uniquely low stand-by use, while an ultra-fast Digital Signal Processor guarantees seamless switching between all available energy sources. Power Assist prevents power dips and failures, even with a weak electricity connection or small generator. Moreover, all Mass Combi Ultra models are equipped with MasterBus.
Higher yield from solar energy
At Mastervolt we used our knowledge gained in the grid connected solar sector to make a super-efficient built-in MPPT solar charge regulator. Compared to most solar charge regulators on the market, the MPPT offers up to 30 % more yield from solar panels. The solar panels power ‘hidden’ consumers and keep your batteries in optimal condition.
‘Pro’ Models
For professional applications. Mastervolt offers a ‘Pro’ model, featuring all Ultra functions, but without the solar input and secondary battery charger.
Quiet operation
The Mass Combi Ultra and Mass Combi Pro can provide up to 50 % of the charging current or inverter capacity without fan cooling. This is perfect for night-time operation; if little power is consumed, the fan stops turning and goes silent. When maximum capacity is required, or the ambient temperature is very high, the Active Optima Cooling concept regulates the fan speed in a linear way, ensuring that it never spins too fast or makes any unnecessary ticking noises.
Parallel and 3-phase operation
The Mass Combi Ultra functionality goes beyond stand-alone operation, the design also allows parallel and 3-phase configurations for larger applications up to 35 kW. For larger systems, an external transfer system is required.
Dual AC inputs and outputs
The Mass Combi Ultra and Mass Combi Pro have inputs for generator or mains supply, each optimized for the power source. A robust intelligent transfer system switches seamlessly between AC power, generator and inverter, and ensures a constant power supply. Flickering lights or failure of electronic equipment belong to the past. Separate AC outputs provide the ability to power heavy users via mains and/or generator.
Features
- For professional and semi-professional use
- Quiet, powerful inverter with 200 % peak power
- Compact, lightweight and hum-free thanks to HF technology
- Pure sine wave voltage prevents malfunctions and damage to sensitive equipment such as adapters
- High yield and more power from your batteries
- Intelligent 3-step+ battery charger with low DC ripple current for fast charging times and long battery life
- Power Assist: prevents blown fuses
- A dynamic battery voltage window allows you to enjoy AC power for longer without damaging your batteries
- Active Optima Cooling concept prevents unnecessary fan noise
- Charges two individual battery banks simultaneously
- An integrated MPPT solar charge controller allows for 30 % more yield from solar power for charging the batteries
- Quick installation and reliable professional connections
- CE, ABYC and RMRS certified
Specifications:
Sine Wave Inverter
- Nominal DC voltage:24 V (19-32 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: 7000W
- Max. efficiency: ≥ 92 %
- Max. ripple on DC (battery at full load): < 5 %
- No-load power consumption on DC (ON/inverter OFF/OFF): 16 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
- Synchronize with mains/generator: yes
Battery Charger
- Input voltage range: 184–275 V
- Max. input current: 16 A
- Max. charge current at 40 °C / 104 °F: 100 A at 28.5 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
Transfer System
- AC input (generator): 50 A (switched)
- AC input (mains): 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
- Solar Input (DC)
- Input voltage range: 25-100 V
- Max. PV peak power: 500 Wp
- Max. input current: 19 A
- Max. charge current: 15 A at 28.5 V
- MPP Tracker: full power at 35-80 V
General
- Display/read-out: LED display
- Dimensions, hxwxd: 472 x 318 x 178 mm / 18.6 x 12.5 x 7.0 inch
- Weight: 15.3 kg / 33.7 lb
- Approvals: CE, ABYC, RMRS
Technical specifications
- Charge characteristic: IUoUo, automatic 3-traps+ voor AGM/Gel/MLI/nat/tractie/spiraal
- Recommended battery capacity: 200-600 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: yes
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
Specifications:
- Charger Output - Amps: 100a
- Charger Output Voltage: 12/24v
- Inverter Cont. Output Wattage: 3500w
- Inverter Output Voltage: 230v
- Inverter Input Voltage: 24v
- Charger Input - Voltage: 230v
- Outlet Qty: Hardwire
- Charging Banks: 2
- Box Dimensions: 9"H x 16"W x 23"L WT: 40.4 lbs
- UPC: 816882020421
Owner's Manual (pdf)
Why Choose MarineXGear
At MarineXGear, we believe true peace of mind on the water starts with having the right equipment. Our mission is simple: to be the trusted destination for premium marine gear and dependable on-water solutions. Every product we carry — whether navigation systems, safety equipment, marine electronics, or boat accessories — is carefully chosen to help you perform at your best, stay safe, and get the most out of every voyage.
A+ Customer-First Approach
We're more than an online store — we're your partner on the water. Unlike large, impersonal retailers, our dedicated team delivers personalized guidance at every step. Whether you're outfitting a vessel for the first time, upgrading your gear, or need expert advice on a specific product, our specialists are always just a call or email away.
Passion for Wellness & Resilience
Our brand is built on a genuine love for the sea. We live and breathe marine equipment — and when you reach out to MarineXGear, you'll connect with experts who understand both the technical specs of our products and the on-water lifestyle they support.
Trusted Experts, Curated Brands
We partner directly with the most respected names in the marine industry. Our curated selection ensures every product meets our high standards for quality, durability, and performance on the water. With MarineXGear, you shop with confidence, knowing you're investing in proven gear backed by full manufacturer warranties.
More Reasons to Choose MarineXGear
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At MarineXGear, we're committed to keeping you safe, equipped, and confident on the water. With our expertise, personalized service, and carefully curated selection, you can invest in your vessel and your adventures with complete peace of mind.
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