Battery chemistry affects how an industrial power station stores and delivers energy, but chemistry alone does not determine whether a complete system suits a project. For a useful comparison, define the alternative. This guide compares lithium iron phosphate, commonly written LiFePO4, with lead-acid batteries used in many established backup applications.
Compare usable energy rather than labels alone
A capacity figure in amp-hours is incomplete without the battery voltage. Energy in watt-hours or kilowatt-hours makes comparisons easier, but the amount available to equipment also depends on permitted discharge, power conversion and system limits.
Ask for usable energy under the expected operating conditions. Compare complete systems serving the same duty rather than assuming that equal nameplate energy will produce equal runtime. Temperature, load level and battery condition can change the result.
Consider mobility and repeated operation
LiFePO4 is commonly selected for applications that need repeated charging and discharging with a manageable transport weight. Lead-acid remains an option in applications where installation conditions, purchase cost and established maintenance arrangements suit the duty.
Compare the actual system weights and dimensions, including enclosure, inverter and handling equipment. A chemistry-level comparison does not tell you whether a complete power station can be moved conveniently around a worksite.
Check battery management and charging requirements
A LiFePO4 system uses battery management to monitor cells and enforce operating limits. The complete system design also needs appropriate power conversion, thermal management and protection. No chemistry makes those requirements optional.
Use the charging equipment and limits specified for the battery system. Do not assume that a charger for one chemistry or voltage can be reused with another. Ask the supplier to confirm charging behaviour and operating-temperature limits for the proposed configuration.
Compare life and cost on the same basis
Cycle-life claims depend on test conditions, depth of discharge, temperature and the capacity threshold used to define the end of life. Request those conditions before comparing headline figures. Warranty terms and available service support also affect the purchasing decision.
For a rental fleet or construction project, consider usable energy per duty period, charging access, inspection requirements, downtime and replacement planning. A lower initial purchase price may not produce the lowest operating cost for a heavily used application.
Choose a complete system for the load
PurMars uses LiFePO4 technology in its mobile energy storage platforms. Compare model-specific specifications and use our power station sizing guide to prepare your requirements. Contact PurMars for documentation relevant to the exact configuration.