LV40-70 DC Voltage Booster Overview
It is use to booster low voltage input to high voltage to meet solar pumps system application which need high voltage using.
For example, For 1/3 phase 220VAC pumps, it should be request Vmp ( working voltage) is 310VDC, Voc ( open loop voltage) is 350VDC.
For 3 phase 380VAC pumps, it should be request Vmp 540VDC, and Voc 620VDC.
To order to get high voltage output from solar panels, we always connect solar panels in serial.
for 37voc solar panels, we need do 10 pcs solar panels connection in serial to get 370VDC, and need do 17 pcs solar panels connection in serial to get 629VDC.
And it will cause big investment for small power solar pumps system, and also make it difficult to promote this very good green energy solar pump system solution for people who need more water but less of grid power.
Specification
LV40-70 design for “L” (3phase 220Vac) inverter, input voltage range :40 to 70Vdc,output will be 240Vdc to 420Vdc.
| Model | Input VDC range | Output VDC range | Pump Voltage |
| LV40-70 | 40-70 VDC | 240-430VDC | 220V |
| LV60-90 | 60-90 VDC | 300-450VDC | 220V |
| LV60-90 | 60-90 VDC | 480-720VDC | 380V |
Application
Low voltage booster device is specially for small power solar pump inverter with low current and high voltage, especial for 0.75kw, 1.5kw 220V pumps, and 0.75kw, 1.5kw 380V pumps. Input voltage is DC60-90V or DC40-70 can work normally, output voltage is 5~7 times of input voltage.Output voltage changes according to input voltage so that solar pump inverter can track the maximum power of PV arrays.
This product has high efficiency. When power is under 200w, the efficiency is under 90%; when power above 200W, the efficiency can reach above 90%. Efficiency increase with power increase, maximum efficiency can reach 95%. Normally, this product doesn’t need operation, normal working only need to connect the input wire and output wire correctly.
