蓄电池组计算器
根据负荷计算蓄电池组容量及续航时间。
尝试一个工程 6
每项工作都会预填示例数值。请替换为您自己的数值。
- Size a battery bankThe bank capacity the loads need for the autonomy days.
- Size a 12 V battery for a camperThe Ah for a fridge and lights for one day.
- Size a 24 V PLC panel backupThe Ah to hold a 120 W panel for four hours.
- Size a bank for three winter daysThe Ah for three days of autonomy.
- Size a lithium bankThe Ah at 90 % depth of discharge.
- Size a bank for a cold siteThe Ah with a cold-temperature factor.
输入
使用默认输入值的示例计算。
- 负荷
- 2 行
- 系统电压
- 48 V
- 放电深度
- 0.5
- 逆变器效率
- 0.9
- 温度系数
- 1
- 续航时间
- 1 days
所需容量
225.93Ah
- 每日用电量
- 4,880Wh
- 每日充电量
- 112.96Ah
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 每日能耗4,880Wh
- 每日充电量112.96Ah
- 所需容量结果225.93Ah
关于此计算器
How this is calculated
The tool sizes a battery bank in ampere-hours for a set of loads. It reads no table, so it cites no clause.
- Inputs. You enter each load in watts with its hours of use. You also enter the system voltage and the depth of discharge. Then you enter the inverter efficiency, the temperature factor and the days of autonomy.
- Energy per day. For each load, it multiplies the power by the hours of use. It adds the loads.
- Charge per day. It divides the daily energy by the system voltage and by the inverter efficiency. The result is the daily charge in ampere-hours.
- Required capacity. It multiplies the daily charge by the days of autonomy and the temperature factor. It then divides by the depth of discharge.
The depth of discharge is the share of the battery you allow to be used. A lower value gives a larger bank. The temperature factor is 1 at normal temperature. A value above 1 adds capacity for a cold site.
Worked example
- A 48 V bank for two loads. The loads are 500 W for 4 h and 120 W for 24 h. The depth of discharge is 0.5 and the inverter efficiency is 0.9. The energy per day is 4,880 Wh. The charge per day is 112.96 Ah. The required capacity is 225.93 Ah.
Limits
The tool gives capacity only. It does not choose a battery chemistry, a charger or a cable. For the cable between the bank and the inverter, use the DC cable size calculator.
The result assumes the loads are the same each day. It does not model charging from solar or the grid. It does not model battery ageing or a changing discharge rate. For a home battery with an inverter and solar, use the home battery tool.
The tool uses one system voltage for the whole bank. A 24 V bank and a 48 V bank hold the same energy but give different amp-hours. Take the depth of discharge from the battery maker. It differs between chemistries.
See also: Battery bank for three days of autonomy, Off-grid battery bank at 48 V and Home batteries and AS/NZS 5139.
问题
结果仅供设计参考。请依据现行标准核对。
蓄电池计算器有什么作用？
工具将您输入的每个负荷的能量（瓦 × 小时）相加。再按系统电压将该日能量换算为安时。然后报告您所需自主供电天数对应的蓄电池组容量。
哪些输入最重要？
负荷清单和自主供电天数直接按比例决定容量。放电深度用于除以容量，默认为 0.5。逆变器效率默认为 0.9。温度系数乘以结果，默认为 1。系统电压决定安时数。
本工具不做什么？
本工具不选定电缆、充电控制器或充电电源的规格。因结果为直接计算，故不引用标准表格。直流线路请使用电缆截面工具。输入值保存在页面地址中，因此链接可复现选型结果。
计算示例
- 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.
- Battery backup for a PLC panel at 24 V DCSizing a 24 V DC backup bank for an 80 W PLC panel over one day of autonomy, with the daily energy, the daily charge and the bank capacity the tool returns.
- 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.
- 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.
- 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.
- 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.
背景
- Home batteries and AS/NZS 5139How a home solar battery is sized in kWh, what usable, nominal, depth of discharge and round-trip efficiency mean, and where AS/NZS 5139 lets one go.
- Control panels and PLC wiringSegregation of LV and ELV in a control panel, terminal and numbering practice, panel earthing, and the 24 V DC voltage drop that long instrument loops fail on.
- PV and inverter basicsHow a grid-connected PV system connects to an installation, why voltage rise sets the inverter cable, and which standards the AmpSize tools cannot quote.
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