Sizing nickel iron batteries for RAPS systems

Nickel-iron batteries have long life expectancy and are tolerant of abuse or poor charge regimes. However their larger internal impedance often results in premature voltage cut-out with remote area power supplies (RAPS) inverters. A new method for sizing nickel iron batteries is proposed, which incorporates a technique that helps address this problem at the design stage. An economic analysis is presented which reveals that nickel-iron batteries can represent a cost effective solution in some RAPS applications.