Skip to content
⚡ Sales Tax Free! (Except AZ, CA, FL, OH, IL) ⚡ FALL SAVINGS Are Here

Got Questions?Call Or Text An Expert:513-743-2829

Cart0

Mastervolt Mass Combi Ultra 24V/3500W – 100A – 230V [38023500]

Authorized Mastervolt Dealer | Full Vendor Warranty Included

4.6/5 Based on 2,000+ Online Orders

Original price was: $6,122.99.Current price is: $4,659.99.

Save $1,463.00

Hurry! Only a few left in stock

Request a Quote
More payment options

Secure checkoutVISAMastercardAMEXPayPal

🚚 Shipping & Delivery TimeShipping timeline above is an estimate. Please live chat for precise ETAs and shipping costs.
🛡️ 30-Day Return GuaranteeCheck Policy
💲 Price Match Available
🏷️ Sales Tax Free! (Except AZ, CA, FL, OH, IL)
☀️ SUMMER DEALS ARE HERE – LOWEST PRICES GUARANTEED ☀️Summer prices are here! Shop now to grab the lowest prices of the season before the sun sets.
Description

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 3×3
  • 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

WarningWARNING: 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)

Frequently Asked Questions

Do you offer free shipping?

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote.

How fast will my order arrive?

Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.

What's your return policy?

We offer easy returns as long as your item meets the conditions outlined in our Return Policy. Items must be unused, in original packaging, and returned within the specified return window.

Can I talk to someone if I have product questions?

Absolutely! Our in-house product experts are here to help. Live chat or call us at 513-743-2829 for personalized advice before or after your purchase.

Do your products come with a warranty?

Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.

Are your products authentic and brand new?

Yes, we only sell 100% authentic, brand-new products, sourced directly from our manufacturers or authorized distributors.

SHOP WITH PEACE OF MIND

Buy with confidence

VERIFIED STOREEvery product is authentic and brand new.
SECURESecure checkout and protected information.
SSL SECUREEncrypted browsing and checkout.

Over 2,000+ Online Orders

★★★★★ 4.64 (417)

★★★★★

Terry O

BLUETTI AC60P Portable Power Station | 504Wh, 600W

Happy with the Bluetti AC20P purchase. It’s lightweight and easy to carry, making it perfect for outdoor adventures. I love that it’s water-resistant and dust-proof, so I don’t have to worry about where I take it.

★★★★★

Diane

Harvest Right Freeze Dryer

Got a large freeze dryer just so we can make and preserve as much food as possible! I am very pleased with the quality of the freeze dried food and the variety of food that we can put into the system.

★★★★★

Josh

SunGoldPower Off-Grid Solar Kit

I set up the whole kit and they are performing really well. Highly recommend this solar kit if you’re planning to go off-grid solar. This kit can power my 3 bedroom home.

★★★★★

Ludwig

4-Season Deluxe Glamping Dome

Super customer service! Tony really helped me pick a glamping dome that fits my needs. He helped me with the buying process and made sure the glamping domes made it to my home.

★★★★★

Bobby K

Harvest Right Home Freeze Dryer

This is a cool little machine. Customer service went exceedingly well, the problem was corrected, and every batch has turned out as expected.

REAL REVIEWS, REAL RESULTS

Feedback From Our Customers

At Zenergy Recovery, we pride ourselves on delivering top-quality products and exceptional service to professionals and homeowners alike. Here’s what our customers have to say about their experiences with us.

View All Reviews Trustpilot customer rating

★★★★★

Kevin Leary

May 18, 2025

Incredible Tech Support from Anees of Green Vista Living. Exceptional service and went above and beyond on every question.

★★★★★

Bryan Cunningham

Off grid Kit · Dec 21, 2025

Shipment was slow due to high demand, but the team kept me informed and ensured everything arrived properly.

0 reviews
0
0
0
0
0

There are no reviews yet.

Be the first to review “Mastervolt Mass Combi Ultra 24V/3500W – 100A – 230V [38023500]”

Your email address will not be published. Required fields are marked *

You have to be logged in to be able to add photos to your review.