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。
Reads AS/NZS 5139:2019. Tables checked 2 Oct 2026.
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 solar battery for a family homeThe kWh a 25 kWh a day home needs to run its evenings on an 8 kW array.
- Check where a home battery can goThe AS/NZS 5139 rules for a battery on a garage wall backing onto a bedroom.
- Size a battery for the evening peakThe kWh to carry 60 % of 22 kWh a day into the evening.
- Size a battery for 6.6 kW of solarThe battery for a 6.6 kW array and a home using 18 kWh a day.
- Size a battery for a day of backupThe battery for one day of backup with a 5 kW peak.
- Size a battery in 5 kWh modulesThe number of 5 kWh modules a home using 24 kWh a day needs.
输入
使用默认输入值的示例计算。
- 日常使用
- 20 kWh
- 晚间占比
- 60 %
- 自主供电天数
- 1
- 电池峰值负荷
- 5 kW
- 光伏规模
- 6.6 kW
- 每日光伏发电量
- 3.5 kWh/kW
- 可用放电深度
- 90 %
- 往返效率
- 90 %
- 组件尺寸
- 5 kWh
- 位置
- 车库
- 墙面，靠近居住用房间
- 否
可用容量
12.65kWh
- 标称容量
- 14.05kWh
- 建议电容器组
- 3 × 5kWh
- 逆变器，连续运行
- 5kW
- 每日光伏剩余电量
- 15.1kWh
此结果仅供设计参考。请对照现行标准进行核验。
计算步骤
- 晚间用电12kWh
- 需输送的电能12kWh
- 放电效率（往返效率的平方根）×0.95
- 可用容量结果12.65kWh
- 放电深度下的标称容量14.05kWh
- 建议电容器组
3 × 5 kWh
- 逆变器持续额定值5kW
- 光伏每日发电量23.1kWh
- 白天用电后的光伏余量15.1kWh
- 补足晚间份额所需的电能13.33kWh
关于此计算器
How this is calculated
The tool sizes a home battery in kWh from your daily use and your solar array. It also gives the inverter rating and points at AS/NZS 5139.
- Evening use. It takes your evening share of the daily use.
- Energy to deliver. It multiplies that by the days of autonomy.
- Efficiency. It divides by the square root of the round-trip efficiency. That is the discharge efficiency.
- Usable capacity. The result is the usable capacity in kWh.
- Nominal capacity. It divides the usable capacity by the depth of discharge.
- Suggested bank. It rounds up to whole modules of the size you enter.
- PV surplus. It finds the daily PV energy, then subtracts the daytime use. The tool checks that the surplus fills the evening share.
Worked example
- 20 kWh a day, 60 % in the evening, 6.6 kW of PV. The usable capacity is 12.65 kWh. The nominal capacity is 14.05 kWh. The bank is 3 × 5 kWh. The inverter is 5 kW continuous. The PV surplus is 15.1 kWh a day.
Limits
The location rules apply to a pre-assembled integrated BESS. They are in AS/NZS 5139:2019 Cl 4.2.2.2 and Cl 4.2.5. The tool does not hold Amendment 1 (2025). It does not size the DC or AC cable. It does not model tariffs.
Check the usable capacity against the battery data sheet. The nominal capacity is larger, because the battery cannot use all of its charge. The suggested bank is a number of equal modules. Round to the modules the maker sells. Check the inverter against the maximum demand of the home.
See also: Home batteries and AS/NZS 5139, Solar battery size for a family home and PV string sizing.
问题
结果仅供设计参考。请依据现行标准核对。
我需要多大容量的太阳能储能电池？
按日落后所用的电能选定规格。本工具采用您的日用电量及夜间占比，再加上损耗。再除以可用放电深度，得出数据手册上的标称容量。
可用 kWh 与标称 kWh 有什么区别？
标称 kWh 为完整的化学容量。可用 kWh 是蓄电池在停止前允许放出的电量，由放电深度决定。10 kWh 蓄电池在 90% 时可用 9 kWh。
我的太阳能板能否为蓄电池充满电？
工具将光伏容量乘以日发电量，再扣除您的日间用电。若余电小于晚间占用量加损耗，它会发出警告。冬季发电量低于年平均值。
家用储能电池可以安装在哪里？
AS/NZS 5139:2019 规定一体式家用储能电池不得设于居住房间、吊顶空间、墙体空腔、楼梯下方及疏散通道。该标准还规定了与出口、窗户及其他电器之间的净距。本工具会列出您所选位置的相关规定。
这与蓄电池组工具有何不同？
蓄电池组工具依据负荷清单，以设定电压、以安时计算离网或备用蓄电池组的容量。本工具则依据您的电费账单和光伏系统，以千瓦时计算并网家用储能电池的容量。
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.
- 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.
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.
- Home battery location and clearancesWhere AS/NZS 5139 lets an all-in-one home battery go. Restricted places, 600 and 900 mm zones, the habitable room barrier, ceiling, IP codes and working space.
- Battery classes and arc flash in AS/NZS 5139How AS/NZS 5139 classes a battery system by hazard and decisive voltage class, works its arc flash energy, and sets the PPE, consequence and home limits.
本工具读取的条款和表格
- AS/NZS 5139:2019 Cl 4.2.2.2Restricted locations for a home battery
- AS/NZS 5139:2019 Cl 4.2.3.2IP rating of a home battery
- AS/NZS 5139:2019 Cl 4.2.4.2Barrier to a habitable room
- AS/NZS 5139:2019 Cl 4.2.5Working space at a home battery
- AS/NZS 5139:2019 Cl 4.2.2 to 4.2.5Location, clearance and barrier rules for a pre-assembled integrated BESS
- AS/NZS 5139:2019 Cl 7.3 to 7.19Battery signs and where each one goes
表格最后核对于 2 Oct 2026。
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