The SolarKing Battery Setup ready for Testing. I was hoping for better results,
after the dismal results from the Optimum branded lithium based battery. See:
I wanted to be sure that the Battery I purchases was capable of delivering something close to the
advertised capacity. I set up a roughy constant load test with a small ups powering a 40 watt incandescent globe
and discarded automotive headlamp. They each drew about four and a half amps giving a total of around nine amps.
Firstly, I fully charged the battery until the internal controller cut in and stopped the charge process, and
then started the constant load discharge noting the times and current draw.
|21.20||8.60||11.60||UPS Alarm Sounded and Stopped|
The objective is to see how well two household solar panel and a 100AHr LiFePO4 Battery could run a domestic fridge and freezer.
The Freezer is a Kelvinator KTM56200WB with a Volume of 520 Litres and rated power consumption of 375 Watts. According to my cheap
inline watt meter it actually draws about 130 Watts with a power factor of approximatgly 90% when the compressor is running.
The Freezer is a FD213S with a volume of 200 liters. The same cheap watt meter indicates a draw of 50 Watts with a power factor of approximatly 30%. This seem a low power factor but that is what the cheap power meter reads.
The two panel system consists of two 190 watt 36.5 volt (Pmax) PV panels in series, a Victron Energy Blue power Smart MPPT Controller and an Low Energy Developments LiFePo4 12 Volt 100Ahr battery.
The no brand inverter is 12 volt DC to 240 VAC with a peak ratting of 1300 watts.
|Open Circuit Voltage(Voc)||43.80 V|
|Short Circuit Current(Isc)||5.83 A|
|Maximum Power Voltage(Vmp)||36.50 V|
|Maximum Power Current(Imp)||5.20 A|
|Maximum System Voltage||1000 VDC|
|Cell Type||125mm x 125mm|
|Number of Cells||6 x 12pcs|
|Dimensions||1580 x 808 x 40mm(62.20 x 31.81 x 1.57 inch)|
|Practical Module Efficiency||17.76%|
|Nominal Operating Cell Temp.||45±2℃|
|Temp.Coefficient Isc(TK Isc)||0.05%/℃|
|Temp.Coefficient Voc(TK Voc)||-0.33%/℃|
|Temp.Coefficient Power(TK Pmax)||-0.4%/℃|
|Series Fuse Rating||10A|
|Number of Bypass Diode||3|
Note:the specifications are obtained under the Standard Test Conditions(STCs):1000W/㎡ solar irradiance,1.5 Air Mass,and cell temperature of 25℃.The NOCT is obtained under the Test Conditions:800W/㎡,20℃ ambient temperature,1m/s wind speed,AM 1.5 spectrum.