Solar 份指南
光伏工程中逆变器和阵列电缆的电压升高，以及蓄电池电缆选型。
- 阅读约 5 分钟Arc flash at a 48 V home batteryClass a 48 V lithium home battery with 6 kA at its terminals by AS/NZS 5139, find its arc flash energy and PPE level, then bring it down with fuses.
- 阅读约 2 分钟A circuit chart for a house board with solarThe circuit chart and labels for a six-circuit house board with a solar inverter: ways, devices, RCDs, MAIN SWITCH, MAIN SWITCH SOLAR and a shared neutral.
- 阅读约 3 分钟DC isolator rating for a 10 kW solar arrayRate the d.c. isolator and size the frame earth for a four-string domestic array. Check one data sheet that passes and one that fails per pole.
- 阅读约 3 分钟Solar string sizing for a 600 V inverterHow many 49.5 V modules fit a string on a 600 V inverter at -5 °C? Work cold Voc, hot Vmp, the string current, fuses and the d.c. isolator by AS/NZS 5033.
- 阅读约 3 分钟Where can a home battery go? Garage wallsA garage wall that backs onto a bedroom, with a hot water cylinder nearby. See which AS/NZS 5139 location rules fail for a home battery, then fix each one.
- 阅读约 5 分钟12 V caravan cable: d.c. voltage dropA 12 V caravan feed at 30 A over 6 m, checked on 4, 6 and 10 mm² twin against the 10 % ELV limit, then a 48 V battery-to-inverter run.
- 阅读约 4 分钟Solar battery size for a family home: 25 kWh a daySize a solar battery for a home that uses 25 kWh a day with an 8 kW array. Usable and nominal kWh, the bank, the inverter, winter solar and where it can go.
- 阅读约 3 分钟22 kW EV charger amps at 400 V three‑phaseA 22 kW three-phase EV charger draws 31.75 A at 400 V. See the inputs, the clause, the arithmetic and the current that feeds cable sizing and demand.
- 阅读约 3 分钟Off-grid battery bank autonomy at 48 VA bach load list of 7600 Wh per day at 48 V needs 703.7 Ah of battery for two days of autonomy at 0.5 depth of discharge, worked step by step.
- 阅读约 4 分钟AS/NZS 3000 Appendix C: conduit space factorWhat the conduit space factor in AS/NZS 3000 Appendix C governs, which tool reads it, and a worked 50 mm conduit that reaches 52.95 % fill against a 40 % limit.
- 阅读约 3 分钟EV charger cable size for a 7 kW 32 A circuitA 7 kW EV charger on a 32 A dedicated circuit over 30 m needs 6 mm², with 38 A derated capacity, 2.85 percent voltage drop and 0.73 Ω loop impedance.
- 阅读约 4 分钟AS/NZS 3008.1.2 Tables 22 to 29: deratingWhat the derating tables govern, how ambient and grouping combine into one factor, and a 63 A feeder whose capacity falls to 78.85 A on 35 mm² copper.
- 阅读约 3 分钟AS/NZS 3008 Table 27 (now 3.44, 3.45): temperatureAS/NZS 3008 Table 27 corrects a cable rating for the air or soil temperature. The 2025 AU part splits it into Tables 3.44 and 3.45 and re-derives the factors.
- 阅读约 5 分钟DC cable size: 48 V battery and 600 V PV arrayTwo d.c. circuits sized to AS/NZS 3008.1.1:2025, a 48 V battery-to-inverter run that current sizes and a 600 V array feed that voltage drop sizes.
- 阅读约 3 分钟Voltage rise for a 5 kW solar inverter cableA 5 kW single-phase inverter 40 m from the switchboard on 10 mm² copper, with the rise in volts, the percent and the maximum length the tool returns.
本指南使用的计算器
- 蓄电池电弧闪络与等级蓄电池 DVC、危险等级、电弧闪络能量及个人防护装备等级。
- 配电箱回路一览表制作配电箱回路一览表及其所需标签。
- 光伏隔离开关与接地计算器核定光伏阵列电缆、直流隔离开关及接地。
- 光伏组串计算器光伏组件每串数量、组串电流及隔离开关。
- 蓄电池位置检查器依据 AS/NZS 5139，检查家用储能电池可以安装在哪里。
- 电压降计算器计算电缆线路的电压降并检查限值。
- 太阳能储能电池计算器为光伏晚间负荷选型家用储能电池。
- 满载电流计算器根据功率、电压和相数计算满载电流。
- 蓄电池组计算器根据负荷计算蓄电池组容量及续航时间。
- 线管填充率计算器检查电缆束能否放入线管。
- 电缆截面计算器求出通过各项检查的最小电缆截面。
- 直流电缆截面计算器按电流和电压降为最高 1500 V 的直流电缆选型。
- 电压升高计算器计算分布式发电或光伏的电压升高。