Unverified88% confidenceFactTime unknown
标注单位注意区分VA与W，普通继电器式稳压器铭牌多标VA，实际可带纯电阻负载W数需乘以功率因数0.7-0.8，即标称1000VA约等于可带700-800W电阻负载
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88%
Confidence
Long-term
Relevance
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Unverified标注功率需区分VA（视在功率）和W（有功功率），普通稳压器铭牌多标VA，实际可用W约为VA×0.7-0.8，选购时按W计算负载更安全87% similarUnverified标注单位为VA（视在功率）时需乘功率因数0.7-0.8换算为实际W，5000VA稳压器实际带载能力约3500-4000W，切勿按VA数值等同瓦数配置81% similarUnverifiedUPS标称VA与实际可用W存在功率因数换算，传统UPS功率因数约0.6（1000VA=600W），部分高端在线式做到0.9-1.0，看W值而非只看VA才能避免选小75% similarUnverified电池容量看瓦时（Wh=电压V×容量Ah）而非单看Ah，48V 10Ah=480Wh，比36V 10Ah（360Wh）续航多约33%，跨电压比较必须换算成Wh74% similarUnverified带独立开关的排插额定功率必须匹配电器总功率，国标2500W排插承载电流约10A，接空调/电暖器等大功率电器需选16A规格插孔且线径≥1.5mm²74% similar
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