After the lead-acid battery is fully charged, the voltage is generally more than 88v, and the battery quality is quite good if it can reach 90V. If there is condensation, you can check whether the error of the voltmeter is large. If it is the use of lead-acid batteries, the nominal voltage of each battery is 12v, full charge is about 15v, 72 battery packs are composed of 6 batteries, full charge is just about 90v, which is normal.