When the battery of a gas generator set is not in use for a long time, appropriate charging must be provided before use to ensure the normal capacity of the battery. (The actual capacity of the battery can be detected through a hydrometer) Normal operation and charging can cause some water in the battery to evaporate, which requires frequent replenishment of the battery. Before replenishment, the dirt around the filling port should be cleaned to prevent it from falling into the battery compartment. Then, the filling port should be opened and an appropriate amount of distilled or purified water should be added. Do not overfill (based on the battery plate scale). Otherwise, during battery discharge/charging, The electrolyte inside the diesel engine will gush out from the overflow hole of the filling port, causing corrosion damage to surrounding objects and the environment.

避免电瓶在低温下启动机组，低温环境下电瓶容量将无法正常输出，且长时间放电有可能造成电瓶故障（开裂或爆炸）。

Avoid starting the unit with the battery at low temperatures, as the battery capacity will not be able to output normally in low temperature environments, and prolonged discharge may cause battery failure (cracking or explosion).

备用发电机组电瓶应定期对电瓶进行维护充电，可配备浮充电器。

The backup generator set battery should be regularly maintained and charged, and can be equipped with a floating charger.

1、用湿布把电瓶外部擦洗一下，把面板上、桩头上(即正负两个极头)的灰尘、油污、白色粉末等易造成漏电污物擦拭干净。这样经常擦洗电瓶，电瓶的桩头不会积白色的酸蚀粉末，其使用寿命会比较长。

1. Wipe the exterior of the battery with a damp cloth to remove dust, oil, white powder, and other debris that may cause leakage on the panel and pile head (i.e. positive and negative pole heads). Frequently scrubbing the battery in this way will prevent the pile head of the battery from accumulating white acid corrosion powder, and its service life will be relatively long.

2、打开电瓶加水盖，看看水位是否在正常的位置。一般在电瓶侧边会有上、下限的标线来供你参考。如发现水位低于下标线，就须添加蒸馏水，如果一下拿不到蒸馏水，则可用过滤自来水来应急。水不可加太多，标准是加到上下标线中间。

2. Open the water cap of the battery and check if the water level is at the normal position. Generally, there will be upper and lower limit markings on the side of the battery for your reference. If the water level is found to be below the lower mark, distilled water must be added. If distilled water cannot be obtained immediately, filtered tap water can be used as an emergency measure. Do not add too much water, the standard is to add it to the middle of the upper and lower markings.

3、检查一下电池是否充电正常。如果你有三用电表，在起动发动机后，量一下电瓶两极的电压，须超过13V以上才算正常。发现充电电压过低，就需要请人员检修一下充电系统了。如果没有三用电表，可用目测法:发动机起动后，打开电瓶加水盖，看看每一小格里面有没有冒气泡。正常的状况是不断有气泡冒出水面，而且愈加油会冒得愈多；如果你发现没有冒泡，那很可能就是充电系统有毛病了。特别注意的是做此项检验时会有氢气产生，因此检验时千万不可抽烟，以免发生爆炸起火的危险。

3. Check if the battery is charging properly. If you have a three way electricity meter, measure the voltage at both poles of the battery after starting the engine. It must exceed 13V to be considered normal. If the charging voltage is found to be too low, it is necessary to have professional personnel inspect the charging system. If there is no three way electricity meter, visual inspection can be used: after the engine starts, open the battery water cap and check if there are any bubbles inside each small cell. The normal situation is that bubbles constantly emerge from the water surface, and the more fuel is added, the more bubbles will emerge; If you find no bubbles, it is likely that there is something wrong with the charging system. Special attention should be paid to the generation of hydrogen gas during this inspection, so smoking is strictly prohibited during the inspection to avoid the risk of explosion and fire.