I. Main Performance and Technical Indicators of IV Equipment
1.1 The IV test occupies less than 160ms of ct time
1.2 Light source type: Arc pulse xenon lamp, 2,000,000/3,000000 (Warranty/Features);

1.3 Effective spot area: 240mm*240mm;
1.4. Irradiance range: 200-1200W/ ㎡;
1.5 Spectral range: 300-1200nm;
1.6 Light source matching degree: 0.875 to 1.125A+;
1.7 Irradiance non-uniformity: ≤1% (irradiance area 220mm*220mm);
1.8 Irradiance instability: ≤0.5%;
1.9 GRR Capability: ≤10% (Uoc, Isc, FF, Eta)
Sample selection rule: Based on the distribution of efficiency ranges, select 10 efficiency range battery cells, totaling 10 cells
Test requirement: Repeat the test of the selected samples six times.
1.10 Static test stability Eta: < 0.02%
Calculation formula: For the same battery cell, test once every 2 seconds and conduct static tests 20 times to calculate the range of Eta.
1.11 Dynamic test stability Eta: ≤0.05%
Calculation formula: 10 cells, repeat the test 3 times, calculate the range of each cell and then take the average.
1.12. Temperature probe accuracy: < ±0.1℃
1.13. Voltage range: 1V, 5V, 10V, 30V;
1.14. Current range: 0.1A,15A,25A,40A;
1.15. Pulse width: 10-100ms at 1000W/㎡ irradiance, adjustable step by step every 1ms.
1.16. The IV test time is less than 160ms (the bright field pulse width is less than 60ms);
1.17. IV characteristic parameters (including bright field & dark field): Isc, Uoc, FF, Eta, Rs, Rsh, Pmax, Irev, Jsc, Impp, Vmpp, Pmpp, etc.
1.18. Load testing technology: Four-quadrant electronic load, dual-scan measurement technology, effectively eliminating capacitance effect, precisely measuring Perc, Topcon, IBC, heterojunction and other batteries;
1.19. Reference battery temperature control method: Use water cooling for independent control to keep the temperature at 25±1°.