Mastter Series Hybrid Inverters: The Smart Power Backbone for Modern Solar Homes & Businesses

Solar power only delivers its full value when the inverter behind it is intelligent, resilient and built to last. As energy bills climb and grid reliability becomes a real concern, the inverter is no longer a passive box on the wall, it is the brain of your entire energy system.

The Mastter Series hybrid inverter from Power & Sun are engineered exactly for this reality. Spanning single-phase and three-phase models from 5 kW to 15 kW, the range gives homeowners, villas, commercial sites and off-grid projects a single, dependable platform to generate, store and manage their own electricity. This guide walks through what the Mastter Series offers, how the three families differ, and why it is one of the most practical hybrid inverter choices available today.

What Is a Hybrid Inverter — and Why It Matters

A hybrid inverter does the job of three devices in one. It converts DC power from your solar panels into usable AC electricity, charges and discharges a battery, and manages how power flows between your panels, your batteries, the grid and your loads. Unlike a standard grid-tied inverter, a hybrid model keeps working when the grid goes down, so your home or business stays powered.

That combination unlocks three things at once: lower electricity bills through self-consumption, energy security during outages, and the ability to store cheap or surplus solar energy for use after sunset. The Mastter Series is designed to make all three effortless.

Meet the Mastter Series Range

The Mastter Series is built as a complete family rather than a single product, so you can match the inverter to the property instead of forcing the property to fit the inverter. There are two core families:

1. Single-Phase LV Hybrid Inverter (5–10 kW) — Models MSH-5kW-1Ph to MSH-10kW-1Ph. A low-voltage (40–60 V) battery platform ideal for villas, apartments and smaller homes that run on a single-phase supply.
2. Three-Phase LV Hybrid Inverter (10–15 kW) — Models MSH-10kW-3Ph to MSH-15kW-3Ph. A low-voltage battery three-phase solution for larger homes and light commercial sites that need balanced three-phase output.

Whichever family you choose, the engineering DNA stays consistent, high efficiency, smart energy management, strong protection and serious build quality.

Key Features That Set the Mastter Series Apart

Up to 200% PV Oversizing for Maximum Yield

Every Mastter Series inverter is designed to accept significantly more solar than its rated output, up to 200% PV oversizing on the LV models. In practice, this means you can install a larger panel array, capture more energy in early mornings, cloudy spells and the shoulders of the day, and squeeze more kilowatt-hours out of the same inverter. More harvested energy means a faster return on your investment.

Wide MPPT Range and Strong String Currents

The Mastter Series carries dual MPPTs with generous voltage windows — 90–450 V on the single-phase LV unit and 170–900 V on the three-phase models, plus support for up to 20 A string current. The result is flexible array design, better compatibility with modern high-power panels, and reliable tracking even when conditions are less than perfect.

True Backup Power in Milliseconds

When the grid drops, the Mastter Series switches to battery backup almost instantly, under 10 ms on the HV three-phase range and under 4 ms on the LV models. That is fast enough to keep sensitive electronics, computers, routers and medical or refrigeration equipment running without interruption, giving you genuine UPS-grade protection.

Smart, Flexible Energy Management

The Mastter Series is built around intelligent control. It supports 6 editable charge/discharge time slots, dynamic tariff optimisation and a dedicated peak-shaving mode — so you can store energy when power is cheap or plentiful and use it when grid power is expensive or your demand spikes. The HV model adds automatic smart-meter phase-sequence detection and grid-connected plus off-grid three-phase unbalanced output, with single-phase loads supported up to 150%.

Generator-Ready and Built to Scale

Off-grid and hybrid sites are fully covered. The inverters are compatible with diesel generators and can start and stop the generator automatically as needed. And when one unit is not enough, the Mastter Series scales: up to 16 inverters can run in parallel, letting a system grow with the property.

Safety You Can Rely On

Solar safety is non-negotiable. The Mastter Series includes a comprehensive protection suite, integrated DC switch, DC reverse-polarity protection, insulation impedance detection, residual leakage current detection, ground-fault monitoring, short-circuit protection, anti-islanding and DC/AC surge protection. I-V curve scanning accurately identifies string anomalies before they become problems, and an optional intelligent AFCI further reduces fire risk.

Engineered for Harsh Environments

Durability is built in. Every model carries an IP66 rating for dust and water resistance, a transformerless design for high efficiency, and a wide operating temperature range, down to -40°C and up to +60°C on the LV models. Combined with smart fan cooling and operation up to 4,000 m altitude, the range is ready for rooftops, garages and outdoor walls in demanding conditions.

Mastter Series Specifications at a Glance

Specification	Single-Phase LV (5–10 kW)	Three-Phase LV (10–15 kW)
Model range	MSH-5kW to MSH-10kW-1Ph	MSH-10kW to MSH-15kW-3Ph
Output type	Single-phase	Three-phase
Battery type	Li-ion / Lead-acid	Lead-acid / Li-ion
Battery voltage range	40–60 V	40–60 V
Max. PV input voltage	550 V	1000 V
MPPT voltage range	90–450 V	170–900 V
Max. PV input current	up to 32 A	up to 45 A
Max. efficiency	97.70%	97.34%
MPPT efficiency	99.80%	99.80%
Backup switch time	< 4 ms	< 4 ms
Overload capability	2× rated, 10 s	2× rated, 10 s
Parallel operation	Up to 16 units	Up to 16 units
Operating temperature	-40°C to +60°C	-40°C to +60°C
Ingress protection	IP66	IP66
Display / control	LED + Bluetooth + APP	Touch screen + LED + Bluetooth
Warranty	7.5 years	7.5 years

Which Mastter Inverter Is Right for You?

• Choose the Single-Phase LV (5–10 kW) if you have a single-phase villa or home and want a compact, cost-effective hybrid system with battery backup and strong solar oversizing.
• Choose the Three-Phase LV (10–15 kW) if you run a larger home or light commercial property on a three-phase supply and want balanced output with a familiar low-voltage battery setup.

If you are unsure, the right inverter depends on your phase type, daily energy use, available roof space and battery preference, and a quick site assessment will pin it down quickly.

Backed by a Strong Warranty and 24/7 Support

Hardware is only half the story. The Mastter Series is backed by a 7.5-year warranty and 24/7 after-sales support from a dedicated service centre. For anyone investing in a solar-plus-storage system, that means faster response, real accountability and long-term peace of mind, something generic inverters with no support network simply cannot match.

Frequently Asked Questions

Power Your Property the Smart Way

The Mastter Series brings together everything a modern solar system needs: high efficiency, generous PV oversizing, instant backup, intelligent energy management and protection that stands up to tough conditions, all under one trusted brand.
Whether you are electrifying a single-phase villa or designing a scalable three-phase commercial system, there is a Mastter series inverter built for the job.
Ready to find the right hybrid inverter for your project?

Contact Power & Sun today — call +971 4 368 6393 or email info@powernsun.com to speak with our team and get a tailored recommendation.