E-Z-GO Express S4 - Electric Owner Manual - Page 72

MAINTENANCE Read all of this manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notices, Cautions, Warnings, and Dangers. PROLONGED STORAGE Battery charger, controller and other electronic devices need to be disconnected since they will contribute to the premature discharge of batteries. During periods of storage, the batteries will need attention to keep them maintained and prevent discharge. In high temperatures the chemical reaction is faster, while low temperatures cause the chemical reaction to slow down. A vehicle that is stored at 90° F (32° C) will loose.002 of specific gravity each day. If a fully charged battery has a specific gravity of 1.275, and the battery is allowed to sit unused, it will 5 become partially discharged. When it reaches 1.240, which it will do in less than twenty days, it should be recharged. If a battery is left in a discharged state, sulfating takes place on and within the plates. This condition is not reversible and will E OF OC L E +15 -9 C T +5 -15 R -5 -21 O L -15 -26 Y T -25 -32 E -35 -37 cause permanent damage to the battery. In order to prevent damage, the battery should be recharged. A hydrometer (P/N 50900-G1) can be used to determine the specific gravity and therefore the state of charge of a battery. In winter conditions, the battery must be fully charged to prevent the possibility of freezing. A fully charged battery will not freeze in temperatures above -75° F (-60° C). Although the chemical reaction is slowed in cold temperatures, the battery must be stored fully charged, and disconnected from any circuit that could discharge the battery. For portable chargers, T E -45 -43 M P -55 -48 E -65 -54 R A -75 -60 T U -85 -65 R E -95 -71 1.100 1.140 1.180 1.220 1.260 1.300 1.120 1.160 1.200 1.240 1.280 SPECIFIC GRAVITY ELECTROLYTE FREEZING POINT disconnect the charging plug from the vehicle receptacle. For on-board chargers, disconnect the charging harness from the Freezing Point Of Electrolyte batteries. The batteries must be cleaned and all deposits neutralized and removed from the battery case to prevent self discharge. The batteries should be tested or recharged at thirty day minimum intervals. 5 - 22