Gel Cell Batteries
                      iSustain Australia sells a range 
                        of Gel cell deep cycle batteries ranging from 
                        40Ah up to 3500Ah. They are suitable for all deep cycle 
                        applications and solar 
                        power systems. We offer free delivery to most 
                        regional centres in Australia.
                      
                      
                      
                      
                      Gel cell batteries are often referred 
                        to as sealed lead acid (SLA) batteries 
                        due to their non-leaking containers, but they are not 
                        completely sealed, the valve regulation system allows 
                        gas to be expelled. Unlike a traditional wet cell 
                        lead acid battery, these batteries do not need 
                        to be kept upright and are non-spillable, therefore can 
                        be operated in virtually any position. However installation 
                        upside down is not recommended.
                        As Gel cells are sealed and cannot be re-filled with electrolyte, 
                        controlling the rate of charge is very important, they 
                        are prone to damage if gassing is allowed to occur.
                        They must be charged at a slower rate (C/20) to prevent 
                        excess gas from damaging the cells. Gel cells use slightly 
                        lower charging voltages than flooded cells and thus the 
                        set-points for charging equipment have to be adjusted.
                        Most better inverters commonly used in solar electric 
                        systems can be set to limit charging current to the batteries. 
                        Gel cells can be used in virtually any flooded wet cell 
                        application (in conjunction with well-regulated charging) 
                        as well as applications where wet cells cannot be used.
                        Because of their unique features and benefits, gel cells 
                        are particularly well suited for:
                        • Deep Cycle Deep Discharge Applications (Portable 
                        Power, Electronics, Solar Applications)
                        • Standby and Emergency Backup Applications (UPS, 
                        Emergency Lighting)
                        • Unusual and Demanding Applications (Air-transported 
                        equipment, Marine Starting)