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SunMaster 590

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SunMaster SM12-590 590W PERC Monocrystalline Solar Panel

Model SM12-590 | PERC Monocrystalline | 120 Half-Cell | Monofacial | 1500V System Voltage

590 W

Max Power Output

20.85%

Module Efficiency

120

N-Type TOPCon

Product Overview

The SunMaster SM12-590 590W PERC monocrystalline solar panel is engineered for high performance in demanding commercial and residential projects. This high output solar panel delivers up to 590 watts of power with panel efficiency of 20.85 percent under standard test conditions. Its PERC half cell design and 210 by 105 millimeter monocrystalline cells help maximize energy generation in limited roof or ground space. The 120 half cell layout improves shade tolerance and lowers resistive losses across the module surface. A durable anodized aluminum frame and 3.2 millimeter tempered glass with anti reflection coating protect the module in harsh outdoor environments. The panel operates reliably from minus 40 to plus 85 degrees Celsius, making it suitable for a wide range of climates. With a maximum system voltage of up to 1500 volts and a robust IP68 junction box, this module integrates easily into modern string and central inverter systems. Designed and manufactured by Jinhua SunMaster Company Limited in China, this solar panel provides a powerful balance of efficiency, reliability, and long term energy yield for grid tied systems.

Key Benefits

High power density for limited space: With up to 590 watts from a single module, this panel delivers strong output where roof area is restricted. The 20.85 percent efficiency rating helps more energy be produced from every square meter of installation space.

Optimized half cell PERC design: The 120 half cell layout reduces internal power loss and supports higher energy yield over the module lifetime. PERC technology improves light absorption and increases performance in real world operating conditions.

Reliable performance in high temperatures: A low temperature coefficient of Pmax, rated at about minus 0.34 percent per degree Celsius, limits power loss on hot days. The nominal operating cell temperature of 43 degrees plus or minus two degrees supports consistent output in warm regions.

Durable construction for harsh environments: The anodized aluminum frame, IP68 junction box, and toughened glass enable long term outdoor use. Resistance to potential induced degradation and proven load performance help protect your investment over decades of operation.

Flexible system integration: A maximum system voltage rating up to 1500 volts allows longer strings and lower balance of system costs. Standard MC4 compatible connectors and 4 square millimeter cable simplify installation with mainstream inverters and racking systems.

How It Works

This SunMaster 590W solar panel converts sunlight into direct current electricity using high efficiency monocrystalline PERC cells. When sunlight reaches the 210 by 105 millimeter silicon cells, photons transfer energy to electrons in the cell material. These energized electrons are guided by the cell’s internal electric field to create a usable electric current. The 120 half cell configuration divides the panel into top and bottom sections, which lowers internal resistance and improves shade tolerance along the module surface. Anti reflection coated tempered glass increases light transmission into the cells, which helps boost daily energy harvest. The generated direct current flows through the module busbars and out through MC4 compatible connectors to the system wiring. A grid tied inverter then converts this direct current into alternating current that can be used by onsite loads or exported to the grid. All of these stages operate silently in the background once the panel is installed on a suitable mounting structure.

Monocrystalline PERC cell conversion: Each monocrystalline PERC cell uses a high purity silicon wafer to absorb incoming sunlight efficiently. The passivated rear surface reflects unused light back through the cell, increasing the chance of photon absorption and energy conversion.

Half cell and multi busbar current collection: The panel splits the traditional full cell into two half cells, which reduces the current in each cell string and lowers resistive losses. Multiple fine busbars across each cell shorten the path for electron collection and help maintain strong power output even as the module ages.

System integration with inverters: The direct current from several panels is combined into strings matched to the input range of a compatible inverter. The inverter tracks the maximum power point of each string, then converts the energy into alternating current for use in buildings or export under net metering rules.

Technical Specifications

Brand / Manufacturer	Jinhua SunMaster Company Limited
Model Number	SM12-580~605W (SM12-590 variant)
Cell Technology	Monocrystalline PERC half cell
Cell Size	210 × 105 mm
Number of Cells	120 half cells (6 × 20)
Power Range	580 Wp to 605 Wp
Maximum Power at STC (Pmax)	590 Wp
Power Tolerance	-3% to +3%
Module Efficiency (STC)	20.85% (range 20.49% to 21.38%)
Voltage at Maximum Power (Vmpp, STC)	34.3 V
Current at Maximum Power (Impp, STC)	17.21 A
Open Circuit Voltage (Voc, STC)	41.2 V
Short Circuit Current (Isc, STC)	18.35 A
Maximum Power at NOCT	443 Wp
Voltage at Maximum Power (Vmpp, NOCT)	31.82 V
Current at Maximum Power (Impp, NOCT)	13.94 A
Open Circuit Voltage (Voc, NOCT)	38.8 V
Short Circuit Current (Isc, NOCT)	14.86 A
Nominal Operating Cell Temperature (NOCT)	43°C ± 2°C
Operating Temperature Range	-40°C to +85°C
Temperature Coefficient of Pmax	-0.34% / °C (approximate from datasheet)
Temperature Coefficient of Voc	-0.26% / °C
Temperature Coefficient of Isc	+0.05% / °C
Maximum System Voltage	1000 V DC / 1500 V DC
Maximum Series Fuse Rating	25 A to 30 A (datasheet rating 30 A)
Module Dimensions (H × W × D)	2172 × 1303 × 35 mm
Weight	31 kg
Front Glass	3.2 mm tempered glass with anti reflection coating
Frame Material	Anodized aluminum alloy
Junction Box Protection Class	IP68, UL rated
Connector Type	MC4 or MC4 compatible
Cable Cross Section and Length	4 mm²; portrait 300 mm, landscape 1300 mm

Certifications & Compliance

Certifications: IEC 61215, IEC 61730, CE, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018
Inverter Compatibility: Suitable for modern grid tied inverters supporting 1000 V or 1500 V DC strings. Select inverter based on array design and local grid standards.
Environmental: Designed for high reliability under extreme conditions, including salt mist, ammonia, and hail testing, with robust resistance to PID effects.
Warranty: 15 year material and technology warranty and 30 year linear power output warranty from the manufacturer, subject to SunMaster warranty terms.

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

What is your return policy?

What’s covered by your return policy?

How long will it take to receive my order?

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

SunMaster SM12-590 590W PERC Monocrystalline Solar Panel

Model SM12-590 | PERC Monocrystalline | 120 Half-Cell | Monofacial | 1500V System Voltage

590 W

Max Power Output

20.85%

Module Efficiency

120

N-Type TOPCon

Product Overview

Key Benefits

How It Works

Technical Specifications

Brand / Manufacturer	Jinhua SunMaster Company Limited
Model Number	SM12-580~605W (SM12-590 variant)
Cell Technology	Monocrystalline PERC half cell
Cell Size	210 × 105 mm
Number of Cells	120 half cells (6 × 20)
Power Range	580 Wp to 605 Wp
Maximum Power at STC (Pmax)	590 Wp
Power Tolerance	-3% to +3%
Module Efficiency (STC)	20.85% (range 20.49% to 21.38%)
Voltage at Maximum Power (Vmpp, STC)	34.3 V
Current at Maximum Power (Impp, STC)	17.21 A
Open Circuit Voltage (Voc, STC)	41.2 V
Short Circuit Current (Isc, STC)	18.35 A
Maximum Power at NOCT	443 Wp
Voltage at Maximum Power (Vmpp, NOCT)	31.82 V
Current at Maximum Power (Impp, NOCT)	13.94 A
Open Circuit Voltage (Voc, NOCT)	38.8 V
Short Circuit Current (Isc, NOCT)	14.86 A
Nominal Operating Cell Temperature (NOCT)	43°C ± 2°C
Operating Temperature Range	-40°C to +85°C
Temperature Coefficient of Pmax	-0.34% / °C (approximate from datasheet)
Temperature Coefficient of Voc	-0.26% / °C
Temperature Coefficient of Isc	+0.05% / °C
Maximum System Voltage	1000 V DC / 1500 V DC
Maximum Series Fuse Rating	25 A to 30 A (datasheet rating 30 A)
Module Dimensions (H × W × D)	2172 × 1303 × 35 mm
Weight	31 kg
Front Glass	3.2 mm tempered glass with anti reflection coating
Frame Material	Anodized aluminum alloy
Junction Box Protection Class	IP68, UL rated
Connector Type	MC4 or MC4 compatible
Cable Cross Section and Length	4 mm²; portrait 300 mm, landscape 1300 mm

Certifications & Compliance

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

Jacob B

Easy Process, Genuine Support

Patrick B

Off Grid Solar Purchase

James Martin

Highly Recommend

Brian H

Solar Kit for Mobile Work Van

Keith S

Best Tech Support

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