Portable Inverter Energy Storage All-in-One（1kWh）

OCE-ESS-500W 1kWh Portable Power Station

Ocean Solar OCE-ESS-500W is a compact 1kWh-class portable power station designed for light-load backup power, outdoor use, mobile work and off-grid applications. It combines 1004.8Wh nominal energy capacity with a 500W pure sine wave inverter in an approximately 11kg portable enclosure.

The system supports both AC mains charging and solar charging. Its integrated MPPT solar input accepts 10-55VDC and up to 300W of PV power, while the built-in backup function provides a specified transfer time of ≤20ms for compatible loads.

With 230VAC pure sine wave output, battery protection functions, operating noise below 40dB and a compact 356 × 210 × 156mm body, the OCE-ESS-500W is suitable for distributors, portable-energy suppliers, outdoor equipment businesses and professional users requiring a compact power source for loads within the 500W rated output limit.

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OCE-ESS-500W Key Specifications

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1004.8Wh Energy Capacity in an 11kg Portable Format

The OCE-ESS-500W provides 1004.8Wh of nominal stored energy in a compact enclosure measuring 356 × 210 × 156mm. With a net weight of approximately 11kg, the unit can be transported between homes, offices, vehicles, outdoor locations and temporary work sites more easily than larger stationary battery systems.

The 1kWh-class capacity is designed primarily for low-power electronics and light electrical loads rather than high-power household appliances. Actual runtime depends on the connected load, usable battery energy, inverter losses, battery condition and operating temperature.

500W Pure Sine Wave AC Output

The integrated inverter provides 500W rated AC output at 230VAC ±5V and 50Hz ±0.5%. Pure sine wave output is suitable for compatible electronic and electrical equipment whose continuous operating power and startup requirements remain within the system limits.

The current specification states total harmonic distortion below 3% for linear loads and below 5% for nonlinear loads, with maximum inverter efficiency of 88%.

What Can a 500W Portable Power Station Run?

Typical compatible loads can include laptops, routers, communication equipment, LED lighting, small displays, battery chargers, small fans and other devices whose operating requirements remain within the 500W rated output.

Equipment containing compressors, pumps, motors or other high-starting-current loads should be checked individually. The unit should not be selected for kettles, electric heaters, microwave ovens or other appliances whose required power exceeds the inverter rating.

300W MPPT Solar Charging

The OCE-ESS-500W supports solar charging through an integrated MPPT input. Maximum photovoltaic input power is 300W, nominal PV voltage is 30V and the supported PV operating-voltage range is 10-55VDC.

Maximum PV input current is 10A. The current product specification lists one XT90E-Mcover solar input interface.

When selecting a solar panel, buyers must check panel Voc, Vmp, Isc and Imp against the power station's PV voltage and current limits. Cold-weather open-circuit voltage should remain within the permitted input range.

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Wide-Range AC Charging

In addition to solar charging, the OCE-ESS-500W accepts single-phase AC mains input with a rated voltage of 230VAC.

The published AC input-voltage range is 90-280VAC ±5V with an input-frequency range of 45-65Hz. This wide input range can be useful in applications where the available AC supply is subject to voltage variation.

≤20ms Backup Power Switching

The integrated backup function has a specified transfer time of ≤20ms. This allows compatible low-power equipment to switch from the AC source to stored battery power when the mains supply is interrupted.

A ≤20ms transfer specification should not automatically be treated as zero-interruption online UPS performance. Whether a particular device remains continuously operational depends on the connected equipment's own power-supply design and tolerance to transfer time.

Critical servers, medical equipment or other devices requiring zero-transfer-time power should be evaluated separately before deployment.

Battery Management and Electrical Protection

The OCE-ESS-500W integrates battery and electrical protection functions for under-voltage, over-voltage, short-circuit and over-temperature conditions.

These protection functions are designed to monitor abnormal electrical and thermal conditions during charging, storage and power-output operation.

Published 8,000-Cycle Battery Life

The current product specification states a battery cycle life of 8,000 cycles. For distributor qualification, tender documentation or technical comparison, buyers should confirm the corresponding depth of discharge, charge and discharge rate, operating temperature and end-of-life capacity-retention threshold.

Published Battery Cell Parameters

The current technical specification lists battery data of 3.2V rated voltage and 314Ah typical capacity, corresponding to the published 1004.8Wh nominal energy figure.

It also lists a 2.9-3.65V voltage range, 140A maximum charging current and 500W maximum charging power. These values are presented as published battery-cell data rather than as an assumed system-level DC-bus specification.

Buyers requiring battery pack architecture, cell chemistry, BMS limits or transportation documentation should request the latest complete battery specification before project approval or OEM ordering.

Low-Noise Portable Design

The unit measures 356 × 210 × 156mm and weighs approximately 11kg. Its compact form supports transportation between residential, office, vehicle, outdoor and field-work environments.

Published operating noise is below 40dB, making the OCE-ESS-500W relevant to applications where lower acoustic output is preferred.

Four SOC indicators display approximately 25%, 50%, 75% and 100% battery levels, while a separate operating-status indicator provides basic system information.

AC and USB Output Interfaces

The standard OCE-ESS-500W configuration provides one AC output socket for compatible 230V loads and one USB output rated at 5V / 1A with a maximum output power of 5W.

Distributors requiring different AC socket formats, additional DC interfaces, USB-C Power Delivery or higher-power USB charging should confirm available configurations with Ocean Solar before ordering.

Environmental Operating Conditions

Applications for a 1kWh 500W Portable Power Station

Outdoor and Camping Power

The portable format and integrated solar charging input make the OCE-ESS-500W suitable for compatible lighting, laptops, chargers, communication equipment and other low-power devices used during camping, temporary outdoor activities and field work.

Home and Office Backup

During short power interruptions, the system can provide stored energy to selected loads such as routers, laptops, displays and LED lighting when total connected power remains within the 500W rated output.

Mobile Work and Field Operations

The 11kg portable design can support compatible communication equipment, inspection devices, electronic tools and laptop-based field work where conventional mains power is not readily available.

Remote Solar Power

When paired with a correctly matched photovoltaic module, the integrated 300W MPPT input provides a portable energy option for remote locations and temporary work sites requiring battery storage away from the utility grid.

Portable Power Station Selection Guide

The OCE-ESS-500W is designed primarily for buyers who prioritize approximately 1kWh of stored energy while requiring only moderate AC output power. It is therefore best matched to longer-duration light loads rather than short-duration high-power appliances.

For Distributors, Importers and OEM Projects

The OCE-ESS-500W can be evaluated by portable-power distributors, outdoor equipment suppliers, energy-storage resellers and private-label buyers looking for a compact 1kWh-class product with 500W pure sine wave output and solar charging capability.

For volume procurement, buyers should confirm destination-market AC voltage and frequency, socket format, product labeling, packaging, battery transportation documentation, certification requirements and order quantity before production.

Buyers requiring private-label configurations should also confirm whether alternative interfaces, USB charging specifications or other external configurations are available for the intended market.

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Frequently Asked Questions About the OCE-ESS-500W

What is the battery capacity of the OCE-ESS-500W?

The current product specification states a nominal energy capacity of 1004.8Wh, placing the OCE-ESS-500W in the approximately 1kWh portable power station class.

What is the continuous AC output power?

Rated AC output is 500W. Connected equipment should remain within this limit, including consideration of startup current for motors, compressors and similar loads.

Does the portable power station provide pure sine wave output?

Yes. The current specification lists 230VAC ±5V pure sine wave AC output at 50Hz ±0.5%.

Can the OCE-ESS-500W be charged from solar panels?

Yes. The integrated MPPT solar input supports up to 300W of PV power, a 10-55VDC input-voltage range and a maximum PV input current of 10A.

What solar panel can be used with the OCE-ESS-500W?

The solar module or module configuration must remain within the 10-55VDC PV input range, 10A maximum current and 300W maximum PV input power. Module open-circuit voltage should also be checked at the minimum expected operating temperature.

How fast does the backup function switch during a power outage?

The published transfer time is ≤20ms. Compatibility should be checked for equipment that has strict requirements for uninterrupted power.

Is ≤20ms the same as a zero-transfer online UPS?

No. A ≤20ms transfer specification indicates a short switching interval rather than zero-transfer online UPS operation. Critical equipment should be evaluated against its own power-continuity requirements.

How long can the 1kWh power station run a device?

Runtime depends on connected power, usable battery capacity, inverter efficiency, battery condition and operating temperature. A fixed runtime should not be assumed solely from the nominal 1004.8Wh capacity.

What battery protection functions are included?

The current specification lists under-voltage protection, over-voltage protection, short-circuit protection and over-temperature protection.

What is the stated battery cycle life?

The current product specification states 8,000 cycles. Buyers requiring qualification data should confirm depth of discharge, test temperature, charge and discharge rate and the capacity-retention threshold associated with this figure.

What battery chemistry does the OCE-ESS-500W use?

The current product specification provided for this model lists the battery's voltage and capacity data but does not explicitly identify the battery chemistry. Buyers requiring chemistry confirmation should request the latest battery specification and transportation documentation before ordering.

How much does the OCE-ESS-500W weigh?

Net product weight is approximately 11kg. Packaged gross weight is approximately 12kg.

What are the dimensions of the portable power station?

Product dimensions are 356 × 210 × 156mm. The current packaging dimensions are 412 × 262 × 212mm.

How noisy is the OCE-ESS-500W?

The published operating-noise specification is below 40dB.

What is the operating temperature range?

The specified operating-temperature range is -10°C to +50°C, while the storage-temperature range is -15°C to +60°C.

Does the OCE-ESS-500W have USB output?

Yes. The current standard configuration lists one USB output rated at 5V / 1A with a maximum output of 5W.

Is the OCE-ESS-500W suitable for OEM and distributor orders?

Distributors, importers and private-label buyers can discuss destination-market voltage, AC socket format, labeling, packaging, documentation and other commercial requirements with Ocean Solar before production.

What information should be provided for a quotation?

Please provide required quantity, destination country, AC socket type, voltage and frequency requirements, intended application, solar-panel requirements, branding needs and applicable product or battery certification requirements.

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