300W JYMU UPS Modified Sine Wave Inverter — Portable Uninterruptible Power with Charger ATS

300W JYMU UPS Modified Sine Wave Inverter — Portable Uninterruptible Power with Charger ATS

The Hisolar JYMU 300W UPS Modified Sine Wave Inverter is a compact 3-in-1 power solution combining a 300W modified sine wave inverter, intelligent 10A/15A battery charger, and automatic transfer switch. Designed for small-scale critical power protection, it delivers 300W continuous with 600W surge capability from 12V or 24V external batteries. The built-in UPS function provides seamless < 10ms switchover for routers, CCTV, small security systems, and essential electronics. With constant current/voltage charging and comprehensive protection, it's the ideal entry-level UPS for home, office, and remote installations.

Product Description

Parameter	Specification
Model	JYMU-300 Series
Rated Power	300W Continuous
Peak Power	600W
DC Input Voltage	12V (10-15.5V) or 24V (20-31V)
AC Output Voltage	100V/110V/120V or 220V/230V/240V AC
AC Input Range	90-135V AC or 190-260V AC
Output Waveform	Pure Sine Wave (Note: Page shows Pure Sine specs)
Output Frequency	50Hz or 60Hz (+/-0.5Hz)
Max Efficiency	> 90%
USB Output	5V 1A
Charger Current (Constant)	10A / 15A
Charging Voltage (Constant)	14.6V DC (12V) / 28.8V DC (24V)
Float Charge	13.8V DC (12V) / 27.6V DC (24V)
Protection	Low/High Voltage, Overload, Over-temp, Short Circuit, Reverse Polarity (Fuse)
Cooling	Intelligent Temperature-Controlled Fan
Dimensions	230 x 180 x 130 mm
Weight	~2.94 kg (Net)
Warranty	1 Year

Performance Advantages

3-in-1 compact design — inverter + battery charger + automatic transfer switch in a 2.94 kg portable unit
< 10ms transfer time — seamless power switchover keeps routers, CCTV, and electronics running without reboot
Constant current/voltage 3-stage charging — bulk charge (constant current), absorption (constant voltage), and float for optimal battery maintenance
Wide AC input voltage range (90-260V) — reliable operation even with unstable or fluctuating grid power
Comprehensive protection suite — protects both the inverter and connected equipment from electrical faults
External battery flexibility — choose battery size based on your runtime needs (not limited by built-in capacity)
30+ years Hisolar manufacturing quality — backed by ISO9001, CE, SAA, RoHS, FCC certified production

Application Scenarios

Home Network Backup — Keeps router, modem, and Wi-Fi running during power outages
CCTV & Security Systems — Uninterrupted power for surveillance cameras and DVR recording
Small Office UPS — Protects desktop PC, monitor, and essential peripherals from power interruptions
Aquarium & Pet Care — Maintains water pumps, filters, and heaters during blackouts
Remote Equipment — Backup power for gate openers, intercoms, and access control systems
LED Emergency Lighting — Powers essential lighting circuits during extended power failures

Why Choose JYINS

Zhejiang Jingying (JYINS) Electrical Co., Ltd., established in 1993, is a leading manufacturer with over 30 years of expertise in power inverters, solar charge controllers, energy storage systems, and renewable energy solutions. Our 500+ employee factory in Wenzhou, China, serves clients across 50+ countries with ISO9001/CE/SAA/RoHS certified products.

30+ years of manufacturing excellence since 1993
ISO9001, ISO14001, ISO45001, CE, SAA, RoHS, FCC certified
Dedicated R&D center with 30+ national patents
OEM/ODM services with flexible MOQ and fast prototyping (7-10 days samples)
Export to 50+ countries across 6 continents
Professional pre-sales engineering support and after-sales service

Frequently Asked Questions (FAQ)

Q: What size battery should I use?

A: A 100Ah 12V deep-cycle battery provides approximately 3-4 hours at full 300W load, or 10-12 hours at typical 80W load (router + CCTV + LED light). Choose battery capacity based on desired backup duration.

Q: Can I use a car battery?

A: Car batteries (SLI type) are not recommended for deep-cycle UPS use. They're designed for short high-current bursts and degrade quickly with deep discharge. Use deep-cycle AGM, gel, or LiFePO4 batteries.

Q: How do I connect the battery?

A: Connect the positive (red) and negative (black) cables to the corresponding battery terminals. Always connect battery first, then AC input. Follow the polarity markings carefully to avoid fuse damage.

Q: Will it overcharge my battery?

A: No, the 3-stage charger with float mode maintains the battery at optimal voltage. Once fully charged, it switches to float charging at 13.8V (12V) or 27.6V (24V), safe for indefinite connection.

Hisolar (Zhejiang JYINS Electrical Co., LTD.),specializing in the production of power inverters, hybrid solar inverter, customized inverter PCB boards, and other clean energy solutions.