Basic System Architecture
The following illustration shows basic application of this inverter.
This inverter can power all kinds of home appliances or office equipment, including motor-type appliances such as tube light, fan, refrigerator and air conditioner.
The Principle of working
1. DC priority mode:
When the solar energy is sufficient, it will charge the batteries and at the same time power the load in Pure Sine-wave AC Output form.
When the Battery Bank has been discharged up to certain level（default 47V） and Grid is available, the system will switch to AC working mode(Bypass).If however, Grid is not available the Battery Bank will continues to discharge until the protection level.
When the battery voltage is recovered to the Recovery point(default 55V) , the system will switch to Inverter mode automatically .
2. AC priority mode:
Whenever AC input is normal, the system will run into AC working mode (Bypass), when AC input is abnormal, the system will work into Inverter mode.
3. SAVER mode:
If the SAVER switch turn on, the system will work into SAVER mode, at the same time, the inverter will shut down, and the solar will charge the battery.
4. Intelligent output function:
The loads are divided into important load which need priority to supply and general load. The system automatically control the OUTPUT L2 N2 according to the battery remaining energy, to ensure the important load can working long time.
5. Generator mode function:
If the Generator output wave is not suitable for the inverter to use, then turn on the GR-SW switch button, the inverter will accept the Generator to power the load and charge the battery. When the generator turn off the inverter will shut down and restart automatically.
| Model |
BK-SI-3KW |
BK-SI-5KW |
| 3000W |
5000W |
| DC48V/51.2V |
| Size (mm) |
620*350*165 |
| Weight(KG) |
30±1 |
35.5±1 |
| Grid (Mains) parameters |
| Input voltage waveform |
Pure Sine Wave(mains or generator) |
| Input voltage |
220Vac |
| Working voltage range |
(165--265) Vac |
| Frequency range |
(45-65)Hz |
| Bypass output
voltage waveform
|
Same as Input Waveform |
| Overload protection |
Breaker On |
| Short circuit protection |
Breaker On |
| Power efficiency |
>98% |
| Switching time (AC to DC) |
5ms(except the generator mode) |
| Switching time(DC to AC) |
5ms |
| Bypass max input current |
17A/28A |
| MAX charge BAT current |
20A/25A |
| Inverter parameters |
| Output voltage waveform |
Pure sine wave |
| Rated output capacity(VA) |
3000 |
5000 |
| Rated output power(W) |
3000 |
5000 |
| PF |
0.9~1.0 |
| Rated output voltage(V) |
220Vac |
| Rated output frequency (Hz) |
50Hz ± 0.1Hz |
| Auto track main frequency(Hz) |
Yes (from the first start)
50Hz @45-55Hz
60Hz @55-65Hz
|
| Output voltage range |
±2% rms |
| Efficient |
>=85% ,92%max(40% line load) |
| Overload protection |
(100% |
| Peak capacity |
6000VA |
10000VA |
| Rated DC input voltage |
48Vdc/51.2Vdc |
| Low DC Cut-off Voltage |
(40--45)Vdc |
| High DC Cut-off Voltage |
(63.0±1)Vdc |
| No Load Power consumption |
<50W |
| Standby Power Consumption |
<10W |
| PV parameters |
| PV input OC voltage range |
(85--150)Vdc |
| MAX input current |
30A |
| MPPT output current(MAX) |
50A |
100A |
| charging bat current |
(20--50)A |
(20--95)A |
| Max efficiency |
96% |
| Temperature coefficient |
-18mV/℃/12V |
| Auto temperature compensation |
Output voltage-（bat temperature-25℃）*0.072 |
| Wind parameters |
| Input voltage |
xx |
| Rating input power |
xx |
| MAX input current |
xx |
| Lithium battery |
| Module |
BFP48100-SI |
| Size(mm) |
620*350*165 |
| Height(KG) |
46.5±1 |
| Energy |
51.2Vdc 100A（5.12kwh） |
| Environment |
| Humidity |
<90% |
| Operating Temperature |
0℃--50℃ |
| Ambient temperature |
load |
Inverter mode continuous working time |
Transformer high temperature protection(switch to AC priority mode or 25 minutes later auto- restart ) |
| 40℃ |
4.5KW |
≥8h |
No |
| 5.0KW |
≥7h |
Maybe |
| 45℃ |
4.5KW |
≥8h |
No |
| 5.0KW |
≥6h |
Maybe |
| 50℃ |
4.5KW |
≥8h |
No |
| 5.0KW |
≥5h |
Maybe |
| Storage Temperature |
-15℃--60℃ |
| Altitude |
<3000m(more than 1000m,the rating power of each increase of 1000m decreased by 10%) |
Standard lithium energy storage system configuration table
| System specification |
3K |
5K |
5K-plus |
| Inverter specification |
BK-SI-3K |
BK-SI-5K |
BK-SI-5K |
| Lithium battery specification |
BFP48100-SI（5.12kwh） |
| Photovoltaic panels Specifications |
Open circuit voltage 40V |
| power 330w |
| Photovoltaic panels quantity（pcs） |
9 |
15 |
18 |
21 |
24 |
| Lithium battery quantity（pcs） |
1 |
1 |
2 |
3 |
4 |
| 85% load backup time（h） |
1.6 |
1 |
2 |
3 |
4 |
| External MPPT |
0 |
0 |
50A |
100A |
| PV Combiner box |
0 |
0 |
2(4 in 2 out) |
| Compared with lead-acid batteries |
Under the same conditions, the service life of lithium batteries is about 5 times that of lead-acid batteries |
Standard lead-acid energy storage system configuration table
| System specification |
3K |
5K |
5K-plus |
| Inverter specification |
BK-SI-3K |
BK-SI-5K |
BK-SI-5K |
| lead-acid battery specification |
Rated voltage 12Vdc |
| Rated Capacity 100AH |
Rated Capacity 120AH |
| Photovoltaic panels specification |
Open circuit voltage 40V |
| Power 330w |
| Photovoltaic panels quantity(pcs) |
9 |
15 |
18 |
21 |
24 |
| Lead-acid battery quantity(pcs) |
4 |
4 |
8 |
12 |
16 |
| 85% load backup time(h) |
1.3 |
1 |
2 |
3 |
4 |
| External MPPT |
0 |
0 |
50A |
100A |
| PV Combiner box |
0 |
0 |
2(4 in 2out) |
