SunGold Power 100 Amp MPPT Solar Charge Controller

The SunGold Power 100 Amp MPPT Solar Charge Controller Turns Up to 5280W of Solar Into 100A of Battery Charging

The SunGold Power 100 Amp MPPT Solar Charge Controller (model SGC4825100A) charges 12V, 24V, 36V and 48V battery banks from solar at up to 100A. It identifies the system voltage automatically, accepts up to 250V of open-circuit voltage from the array, and tracks the maximum power point at better than 99% efficiency.

It is designed for off-grid homes, cabins, shops and other systems with larger solar arrays, especially 48V systems that need high charge current. A built-in LCD, a Bluetooth app and parallel operation make it a flexible core for a stand-alone solar system.

SunGold Power 100 Amp MPPT Solar Charge Controller Features

100A Rated Charge Current

The controller supports solar input of 1320W at 12V, 2640W at 24V, 3960W at 36V and 5280W at 48V. Charge current can be set anywhere from 0 to 100A, and if the array produces more than the rated current, the controller limits charging so it stays within its rating.

250V PV Input

The maximum PV open-circuit voltage is 250V, and the MPPT range runs from 2V above battery voltage up to 180V. That lets you wire panels in longer series strings, with a maximum PV input current of 70A.

MPPT Tracking Above 99%

SunGold's PowerCatcher tracking finds the maximum power point quickly, even as light and temperature change, with tracking efficiency above 99% and as high as 99.9%. Conversion efficiency reaches up to 98%, and SunGold says MPPT improves energy use by about 15% to 20% compared with PWM charging.

Lead-Acid and Lithium Presets

Preset battery types include open (flooded), gel and sealed lead-acid, lithium (lithium iron phosphate by default) and a self-defined setting. Lead-acid profiles use temperature compensation, and the lithium profile can output a stable target voltage to help reactivate a battery after BMS overcharge protection.

Bluetooth App and LCD

A built-in Bluetooth 4.0 BLE module connects to the Solar APP on Android and iOS for monitoring and settings. The standard LCD shows PV voltage, battery voltage, charge current, charge power, amp-hours, temperature and error codes, and it can be mounted remotely with a DB9 extension wire.

Parallel Operation for Larger Arrays

Several controllers can charge one battery bank together. Each controller connects to its own solar array, and the units link over RS485 so the host keeps charge stages and voltages in sync.

Communication, Relay and Sensing

TTL and isolated RS485 ports support the Modbus protocol. A programmable DPST relay rated 10A/250VAC and 10A/30VDC switches on battery overvoltage or over-discharge, and inputs for a battery temperature sensor and a voltage compensation wire improve charging accuracy.

Real-World Applications

48V off-grid homes. Charge a large 48V battery bank from up to 5280W of solar.

Cabins and remote shops. Run a stand-alone solar system with app monitoring and automatic charge stages.

12V and 24V mobile systems. Charge van, RV or boat batteries from 1320W at 12V or 2640W at 24V of solar.

Expanding systems. Add more controllers in parallel, each with its own array, as your power needs grow.

How It Compares to Common Alternatives

Versus PWM controllers. A PWM controller holds the array near battery voltage, so the panel's full power is not used. SunGold says MPPT improves energy use by about 15% to 20%.

Versus the 85A version. SunGold's 85A model in this series is rated for 4400W at 48V and 60A of PV input current. The 100A model raises those limits to 5280W and 70A.

Versus the 150V version. The 150V model in this series accepts a lower PV open-circuit voltage and an MPPT range of up to 120V. The 250V model allows longer series strings.

Is This Solar Charge Controller the Right Fit

• Battery bank. Works with 12V, 24V, 36V and 48V systems in a 9V to 64V battery range.
• Solar array. String open-circuit voltage must stay at or below 250V.
• Location. The controller is IP32 rated. Install it indoors in a ventilated spot, with at least 150mm of clearance above and below.
• Wiring. Use up to 4 AWG at the PV terminals and 2 AWG battery cable, with a fuse or breaker on the PV and battery sides. There is no reverse polarity protection on the battery side.
• Size. It measures 314 x 227 x 121 mm and weighs 5.7 kg.

This may be a good fit if

• You run a 48V system with a large solar array
• You want app monitoring and an LCD
• You may add parallel controllers later
• You use lithium or lead-acid batteries

Common Questions

Does It Detect My Battery Voltage Automatically?

Yes. It identifies 12V, 24V, 36V and 48V systems. If you change the system voltage manually, the change takes effect after the controller restarts.

Which Batteries Does It Support?

It has presets for open, gel and sealed lead-acid batteries and for 12V to 48V lithium iron phosphate batteries, plus a self-defined setting for custom charge voltages.

Can I Connect Several Controllers Together?

Yes. Set each unit's RS485 port to parallel mode and give each an address. Every controller needs its own solar array, and all of them charge the same battery bank.

Can It Be Installed Outdoors?

It should be installed indoors. The controller is IP32 rated, so keep it away from direct sun and water.

What's Included

• 1 x SunGold Power 100 Amp MPPT Solar Charge Controller (SGC4825100A)

High-Current Solar Charging for Larger Systems

The SunGold Power 100 Amp MPPT Solar Charge Controller gives 12V to 48V systems up to 100A of charge current, 250V PV input and Bluetooth monitoring in one unit. At Outbound Power, we help customers match arrays, batteries and charge controllers for off-grid systems. If you have questions, our team is happy to help.

SunGold Power SGC4825100A Manual