Model

SK-4000WMF-24V

SK-4000WMF-48V

Rated Power

4000W

Peak Power

8000W

Nominal Battery Voltage

24VDC

48VDC

Input

DC Input Range

21-30VDC

42-60VDC

AC Mains Input Range

145-265VAC (220/230/240VAC)±4%    

70-150VAC (110/120/130VAC)±4%

AC Input Frequency

50Hz: 45-65Hz / 60Hz: 55-65Hz±0.5Hz (50Hz/60Hz automatic recognition)

Protection

Low Battery Alarm

≤21VDC (24V) / ≤42VDC (48V) alarm

Low Battery Protection

≤20VDC (24V) / ≤40VDC (48V) automatic shutdown

High Battery Alarm

≥30VDC (24V) / ≥60VDC (48V) alarm

High Battery Protection

≥34VDC (24V) / ≥68VDC (48V) automatic shutdown

Over Load Protection

110%<loading<150%, shutdown after 60s alarm, loading>150%, shutdown after 20s alarm

High Temperature

Built-in real time temperature sensor, ≥85℃ alarm, ≥90℃ automatic shutdown

Short Circuit Protection

Automatic shutdown

Output

Transfer Efficiency

≥90%

Output Voltage

(DC battery mode) 220/230/240VAC±2%

(DC battery mode) 110/120/130VAC±2%

Output Frequency

(DC battery mode) 50/60Hz±1%

Output Wave Form

Pure sine wave

Output Voltage

(AC mains mode) stable 220/230/240VAC±10% output (built-in AVR stablizer)

(AC mains mode) stable 110/120/130VAC±10%  output (built-in AVR stablizer)

AVR Output Stablizer

AC mains<170VAC±5% swtich to DC battery mode, AC mains>180VAC ±5% return to AC mains mode.

AC mains>275VAC±5% swtich to DC battery mode, AC mains<255VAC ±5% return to AC mains mode.

The above is for output 220V system reference, 230V/240V output just multiply by percentage

AC mains<80VAC±5% swtich to DC battery mode,

AC mains>90VAC ±5% return to AC mains mode.

AC mains>135VAC±5% swtich to DC battery mode,

AC mains<130VAC ±5% return to AC mains mode.

The above is for output 110V system reference, 120V/130V output just multiply by percentage

Output Frequency

(AC mains mode) automatic tracing from AC input

Other

Transfer Time

Bult- in AC bypass replay (≤5ms)

Display

LCD Display with function buttons

Cooling System

Intelligent cooling fan control system

≤42℃ slow fan, ≥45℃ fast fan

AC Charger

7 Battery Types Mode

GelU.S.A./ Gel European / A.G.M.1 / A.G.M.2 / Sealed lead acid / Open lead acid / Calcium(open) /

Deep sulphation cycle 15.5 for 4 hrs

AC Charging Voltage

27.2-28.4VDC(24V) / 54.4-56.8VDC(48V)

AC Charging Current

0-35A: 5A / 10A / 20A / 25A / 30A / 35A, 6 stages charging current adjustable

3 Stages Charging

Boost charging, direct charging, float charging

AC Over Charge Protection

Battery voltage ≧32VDC (24V) / ≧64VDC (48V), stop charging after 60s alarm

Working Mode 
(Optional)

01

AC mains priority

Always use AC mains as priority input to provide AC output and automatically charge the battery, only

stops charging when battery is fully charged, and only starts DC to AC converting untill AC mains is off

02

Energy saving

Loading≤10% automatic shutdown, loading≥11%-100% automatic turn on

03

DC battery priority

Always use DC battery as priority input to provide AC output, for 12V system, when battery≥13V, starts

DC to AC converting; when battery≤10.5V during converting, switch to AC mains mode to provide AC

output and automatically start charging the battery (for 24V/48V system, multiply by 2/4 accordingly)

Comnunication

RS-232/USB/SNMP(additional option)

Environment

Temperature

-20~+75℃

Humidity

＜95%

Appearance

Product Size (mm)

630 x 280 x 200mm

Packing Size (mm)

740 x 355 x 275mm

Net Weight (Kg)

30Kg

Gross Weight (Kg)

33.5Kg