JA Solar · Deye
JA Solar JAM72D42-640/LB + Deye SUN-12K-SG01HP3-EU-AM2: how many panels per string
From 4 to 16 JA Solar JAM72D42-640/LB panels per string on an MPPT input of the Deye SUN-12K-SG01HP3-EU-AM2 inverter — in any climatic region of Ukraine. Below: the window for each region, the input currents and example plants laid out by the Solispec engine.
- Panels per string
- 4–16pcs
- Input V_max
- 1,000V
- MPPT window
- 150–850V
- Panel I_sc
- 15.31A
- MPPT input I_sc
- 39.0A
- Panel V_mp in heat
- 37.7V
Ground frame designer
A ground plant with JA Solar JAM72D42-640/LB
The builder opens with this panel and the Deye SUN-12K-SG01HP3-EU-AM2 inverter: Solispec lays out the strings itself.
- No sign-up
- Snow and wind check
- Drawings and estimate
String by climatic region
T_min per ДСТУ-Н Б В.1.1-27:2010, табл. 1; open-circuit voltage at T_min: K_U = 1 + α·(T_min − 25)/100 = 1.17 (α -0.25 %/K, T_min -42 °C; Annex B).
| Region | T_min | Panel U_oc at T_min, V | Min per string | Max per string | String U_oc at max, V (≤ 1,000) |
|---|---|---|---|---|---|
| Region I | -40 °C | 61.46 | 4 | 16 | 983.4 |
| Region II | -42 °C | 61.73 | 4 | 16 | 987.6 |
| Region IIIA | -38 °C | 61.20 | 4 | 16 | 979.2 |
| Region IIIB | -32 °C | 60.40 | 4 | 16 | 966.5 |
| Region IV | -20 °C | 58.82 | 4 | 17 | 999.9 |
| Region V | -27 °C | 59.74 | 4 | 16 | 955.9 |
The minimum per string keeps the string voltage in heat (panel V_mp 37.7 V) above the MPPT window (150 V).
Input currents
| Panel I_sc / MPPT input I_sc, A | 15.31 / 39.0 |
|---|---|
| Panel I_mp / MPPT input I_mp, A | 14.45 / 26.0 |
| Parallel strings per MPPT | 1 |
| MPPT inputs | 2 |
No cautions about the currents.
Example plants
The Solispec engine laid out the strings for plants of several sizes with this inverter at the lowest T_min; only those that pass the checks with every panel placed are shown.
| Plant | Panels | kW DC | Inverters | Strings | DC/AC |
|---|---|---|---|---|---|
| ≈ 5 kW | 8 | 5.12 | 1 | 8 pan. × 1 — inv. 1, MPPT 1 | 0.43 |
| ≈ 10 kW | 16 | 10.24 | 1 | 16 pan. × 1 — inv. 1, MPPT 1 | 0.85 |
| ≈ 15 kW | 24 | 15.36 | 2 | 12 pan. × 1 — inv. 1, MPPT 1; 12 pan. × 1 — inv. 1, MPPT 2 | 0.64 |
- DC/AC 0.43 — inverter oversized
- взимку Vmp 865 В > 850 В — вище MPPT
- nothing connected
A preliminary calculation; a design needs an engineer's check. Solispec engine 0.12.0.