SY48100A 100A PWM Solar Charge Controller

Product Specifications

Model / Series: SY48100A
Product Dimensions: 183 × 196 × 70 mm
Controller Type: PWM
System Voltages: 12 / 24 / 36 / 48 V (automatic recognition)
Rated Charge Current: 100 A
Current Filter Band: 61A-100A
Maximum PV Open-Circuit Voltage: 100 V VOC maximum
Supported Battery Types: Lead-acid, LiFePO4 and lithium-ion; configure charging settings

SY48100A: 100 A PWM charging with adjustable battery settings

The 100 A model at the top of the SY-A current range. Its higher nameplate current does not remove the need for a correctly matched solar array, suitable wiring and attention to installation temperature.

This page describes the PWM configuration shown in the product photographs. The wider SY-A catalog also contains differently marked illustrations; confirm the ordered controller version rather than identifying the charging method from the series name alone.

Practical features

100 A rated charging current with automatic 12 / 24 / 36 / 48 V system recognition.
Display and push buttons for monitoring and configuration.
Adjustable battery voltage thresholds for the specified battery chemistry.
Light/timer load control and manual load switching.
5 V / 2 A USB output and an aluminum heat-dissipation back plate.

Technical specifications

Model	SY48100A
Controller version	PWM (matching the photographed units)
Rated charging current	100 A
Rated load current	100 A (catalog rating; installation limits apply)
Battery system voltage	12 / 24 / 36 / 48 V, automatic recognition
Maximum PV open-circuit voltage	100 V VOC
Battery types	Lead-acid, LiFePO4 and lithium-ion; confirm and configure the charging settings
Full-charge cutoff defaults	14.2 / 28.4 / 42.6 / 56.8 V for 12 / 24 / 36 / 48 V systems; adjustable
Low-voltage disconnect defaults	9.5 / 19 / 28.5 / 38 V for 12 / 24 / 36 / 48 V systems; adjustable
USB output	5 V / 2 A
Load operation	Light control with timer, or manual switching
Thermal protection	MOS temperature above 85°C
Working temperature	−10°C to +45°C
Protection rating	IP21
Dimensions	183 × 196 × 70 mm
Net weight	700 g

PV and battery matching

The 100 V figure is the maximum PV open-circuit voltage, not an MPPT operating range and not permission to use any panel string with any battery. The catalog recommends panel voltage selections of 15–23 V for a 12 V battery, 30–46 V for 24 V, 45–66 V for 36 V and 60–90 V for 48 V. Confirm the array specification, including open-circuit voltage under the actual conditions, before connection.

Do not connect a higher-voltage battery-system array to a lower-voltage battery just because its voltage is below the absolute PV ceiling. The catalog recommends keeping PV loading within 80% of the controller rated loading for stable operation; ask for model-specific array sizing.

Installation and environment

Follow the supplied instructions: connect the battery first, then PV, then the DC load. For first connection the catalog requires battery voltage above 10 / 20 / 30 / 40 V for the corresponding 12 / 24 / 36 / 48 V system. Check the recognized voltage before proceeding. IP21 is not a weatherproof outdoor enclosure rating; protect the controller from rain and provide ventilation.

Choosing within SY-A

SY48100A provides 100 A rated charge current and weighs 700 g. SY4860A, SY4880A and SY48100A share the listed enclosure dimensions but are separate 60 A, 80 A and 100 A models. Current capacity must be selected for the actual system, not inferred from the case size.

Frequently asked questions

Is this an MPPT model?

This listing is for the PWM version shown in the photographs. Request separate confirmed specifications if you need a different charging configuration.

Can it charge lithium batteries?

The catalog lists LiFePO4 and lithium-ion as supported battery types. Set the charging and disconnect thresholds for the battery requirements; the default voltage values are not suitable for every lithium pack.

Does 100 V VOC mean a 100 V battery is supported?

No. The battery systems listed are 12 V, 24 V, 36 V and 48 V. The PV open-circuit limit is a separate specification.

Can it be installed outdoors without a cabinet?

The listed protection is IP21. Use an installation arrangement that protects the unit from weather and maintains the specified temperature range.

What information is needed for a distributor quotation?

Send SY48100A, order quantity, battery voltage and chemistry, panel electrical specifications, load requirements and destination market. Ask for confirmed pricing, sample availability and delivery terms.

Product inquiry

For SY48100A supply, share the electrical requirements and quantity so the configuration can be checked before quotation. Branding, packaging, MOQ and lead time are confirmed for the order.

Request SY48100A specifications and a quotation

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