Nexmetal 48V DC battery powered Mini Split Review (2026): A Spec-Based Look

What stands out

• Native 48V DC operation without an inverter
• 36,000 BTU/h cooling and 40,000 BTU/h heating capacity
• Twice as efficient as standard 220V mini splits
• Remembers last settings for up to 24 hours after power failure
• Includes 10 ft insulated lines and a remote control

Who it fits

Key specs explained

Voltage: 48V DC

This unit operates on direct current between 42 and 59 volts. You can connect it directly to a 48V battery bank or solar system without an inverter. This removes conversion losses and reduces strain on your power setup. It is ideal for off-grid homes or cabins where standard 120V or 240V power is unavailable or expensive to run.

Cooling Capacity: 36,000 BTU/h

This rating indicates the unit removes 36,000 British Thermal Units of heat per hour. This capacity is suitable for large spaces, typically around 1,500 to 2,000 square feet, depending on insulation and climate. You should match this tonnage to your room size to ensure efficient cooling without short cycling. Smaller units will struggle, while larger ones may waste energy.

Heating Capacity: 40,000 BTU/h

The system provides 40,000 BTU/h of heat output. This makes it a heat pump capable of warming your space in colder months. The heating output is higher than the cooling output, which is common for heat pumps. You get significant warmth with less energy than resistive electric heaters. Check if this matches your heating needs in winter.

Rated Power Input: 1,700 Watts

The compressor and fans draw 1,700 watts during operation. This figure helps you size your batteries or solar panels correctly. Since it runs on DC, you avoid the inefficiency of inverting AC power. You can calculate how long your battery bank will last by dividing its amp-hour rating by the current draw, which is listed as 44 amps.

Design and Build Overview

According to the listing, the Nexmetal unit measures 39 inches wide, 34 inches high, and 13 inches deep. The indoor panel is white. This size requires a standard wall space. You need at least 39 inches of clear width for installation. The depth of 13 inches is compact for most rooms. It does not protrude excessively into the living area.

The unit weighs 75 pounds. This weight is substantial for a single-person install. You will likely need a helper or a sturdy mounting bracket. The listed model number includes "2250W," which may refer to peak draw rather than the rated 1,700 watts input. The casing appears to be standard plastic, typical for this class of equipment. The finish is a plain white, matching common interior decor.

Included accessories are critical for the build process. The package provides 10-foot insulated lineset and a drain line. This length covers most standard residential runs. You do not need to purchase extra copper tubing for average installations. A remote control is also included. There is no mention of a wall-mounted controller or smart display. The layout is straightforward, focusing on the core components. The design prioritizes function over aesthetic complexity. It is built for direct mounting and simple piping.

Setup And Daily Use Guide

Installation begins with mounting the white indoor unit, which measures 39 inches wide and 34 inches high. You must ensure you have at least 39 inches of clear wall space. The package includes 10-foot insulated lines and a drain line, simplifying the initial connection process. Since this system runs natively on 42 to 59 volts DC, you do not need an inverter. This direct connection to your 48V battery bank or solar array reduces conversion losses and keeps your power setup efficient. The unit weighs 75 pounds, so you need appropriate hardware for secure wall mounting. Daily operation is straightforward. You control the system using the included remote. The heat pump provides both cooling at 36,000 BTU/h and heating at 40,000 BTU/h. The heating function is noted to be five times more efficient than standard electric heaters. You can rely on the unit to remember its last running function after a power failure for up to 24 hours. This feature helps maintain your desired climate without manual reconfiguration. The system is rated at 1,700 watts input. This power draw supports its high efficiency claims when paired with a 48V DC source. You benefit from twice the efficiency of a 220V mini-split in this configuration. The design ensures the compressor and fans run at true 48 volts, maximizing performance for off-grid or battery-tied environments.

Before You Buy This Mini Split

Owning this unit requires verifying your power infrastructure matches its 42 to 59 V DC input range. You must ensure your battery bank or solar system supports this native DC connection. The listing notes it remembers its last function after power failures for up to 24 hours, which is useful for off-grid setups. You need to check if your existing 220V circuits are compatible, as this model bypasses standard inverters. Maintenance involves cleaning the filters and ensuring the included 10-foot insulated lines and drain line are properly installed. Compare this 3-ton model against the 9,000 and 6,000 BTU options if your cooling needs are lower. The 75-pound indoor unit requires sturdy mounting. Consider the higher upfront complexity versus the long-term efficiency gains in an off-grid environment. This unit suits those prioritizing direct battery integration over standard grid connectivity.

Check before you buy

• Verify your battery bank supports 42-59 V DC input.
• Confirm wall space is at least 39 inches wide.
• Check if you need an inverter or can go native DC.
• Ensure you have sturdy mounting hardware for the 75-pound unit.

The product at a glance

1

Nexmetal 36,000 BTU 48V DC Mini Split

Best for: off-grid 48V DC battery systems

Cooling Capacity

36,000 BTU/h (3 Ton)

Voltage

48V DC

Heat Pump

Heat Pump

Dimensions

13 × 39 × 34 inches

Weight

75 pounds

View on Amazon: Nexmetal 36,000 BTU 48V DC Mini Split Affiliate link

This Nexmetal unit is a 3-ton (36,000 BTU/h) heat pump designed for 48V DC systems. It operates natively on 42-59V DC without an inverter, which preserves efficiency in off-grid solar setups. The system provides 36,000 BTU/h of cooling and 40,000 BTU/h of heating. It includes a remote and 10 feet of insulated lines. You should choose this if you need high-capacity climate control for a battery-tied electrical system.

Pros

• Native 48V DC operation eliminates inverter losses
• High cooling capacity of 36,000 BTU/h
• Includes remote and 10 ft insulated lines
• Remembers settings after power failure for 24 hours

Cons

• High rated power input of 1,700 Watts
• Heavy indoor unit at 75 pounds
• Large indoor dimensions at 39 by 34 inches

Good fit if

• You have a 48V DC battery or solar system
• You need 3-ton cooling capacity for a large space
• You want to avoid inverter conversion losses

Skip if

• You only have standard 120V or 240V AC power
• You need a compact unit for a small room
• You require smart app control for remote management

Verdict: Nexmetal 3 Ton 48V DC Mini Split is a specialized heat pump for off-grid 48V DC systems. It suits users who need 3-ton capacity and want to bypass inverter inefficiencies.

Specifications side by side

Frequently asked questions

See also

• nexmetal 48v DC battery powered mini split alternatives
• best mini splits under 500
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