Sunfree 4K/5K Energy Storage Inverter

Sunfree 4K/5K energy storage inverters are used in residential PV energy storage systems, with peak-cutting and valley-filling functions to maximize the use of PV power generation while achieving the goal of saving residential electricity bills. In addition, different working modes can be set as per different customer needs. They are compatible with lead-acid batteries and lithium batteries and can provide uninterrupted power for important load devices with a back-up power supply.
Product features
high IP65 protection grade, suitable for outdoor installation
3/2 paragraphs charging control, to guarantee the battery life
natural cooling, reducing single points of failure
flexible operation
wi-fi/Ethernet/GPRS/RS485 various communication modes can be selected
in peak time period can be set up, automatic cut peak valley
local/remote monitoring was achieved by computer and mobile phone
capacitive sensing keystrokes and LCD display, human-computer interaction more convenient and stable
intelligent and efficient
more than optimal storage electric, increase the rate of photovoltaic power generation for private use
two-way energy storage design, PV, mains can recharge the battery
flexible configuration lead-acid battery and lithium battery
charging control and inverter integration design
at the same time compatible off-grid and grid pattern
Product parameters
DC Input Battery Parameters Grid Parameters AC Output [Back-up Mode] Efficiency Protection Interface General data
Model: Sunfree 4K Sunfree 4K-HC Sunfree 5K Sunfree 5K-HC
Max Input Power [W]: 4200 4200 5200 5200
Max Input Voltage [V]: 580 580 580 580
MPPT Voltage Range [V]: 90-550 90-550 90-550 90-550
Starting Voltage [V]: 120 120 120 120
Min Input Voltage [V]: 80 80 80 80
Max Input Current PV1/PV2 [A]: 11/11 11/11 11/11 11/11
Number of DC Input/MPPT: 2/2 2/2 2/2 2/2
DC Switch: Integrated Integrated Integrated Integrated
Application case
Sunfree 5K Hybrid PV Solar Inverter in Vietnam
Sunfree 4K Hybrid PV Solar Inverter, complementary type used in fishing field in Nansha District, Guangzhou
Sunfree 5K Hybrid PV Solar Inverter in Philippines
Resource download
File NameResource TypeBelonged productsOptions
SAJ Solar inverter Catalogue Brochures Sunfree 4K/5K Energy Storage InverterDownload
Sunfree 4K-5K IEC62109 Product certificate Sunfree 4K/5K Energy Storage InverterDownload
ADD:SAJ Innovation Park, No.9, Lizhishan Road, Science City, Guangzhou High-tech Zone, Guangdong, P.R.China.

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