It may be a problem with your battery, or a problem with the charger, the ordinary battery car can be full of 48V charging for 12-15 hours.
There is also the fact that the electric vehicle battery will not be too full when it is newly bought, but it will not be too small, unless it is an old battery or an inferior battery. When we use it, we should estimate the distance that can be run according to the estimation of the business, so that there is no electricity or too much electricity. When the electric vehicle power display has reached the last grid, it is necessary to consider not riding, to prepare for charging.
Electric vehicle charging: Try to do it outside
The battery of the electric vehicle will run out of flammable gas when charging, so the charging must not be in a narrow, sealed environment, choose ventilation, waterproof, and the ambient temperature should not be too high, and the charging pile is most suitable for the community
Electric vehicle charging: try to choose daytime charging if conditions allow, easy to control the charging time
As we all know, when the battery is charged for the first time, the battery should be full, but full does not mean overcharging, charging during the day is easy to control the charging time, so that the battery will not overcharge and discharge for the first time, so that it is easier to make the first chemical reaction inside the battery normal.
Your battery is not used for a long time and there is no (generally charged once a month) maintenance, so that the battery electrode plate vulcanization is serious, and you add distilled water again, because the electrode plate is dry, so the current is very small when it is just charged, with the extension of time, the electrode plate humidity increases, the conductivity is strengthened, there will be bubbles phenomenon This situation to find professionals to check