Comparison of Time Required to Charge a Battery in a Stand-Alone Photovoltaic System Using Different Charge Controller Types

Research output: Contribution to conferencePaper

Abstract

An experiment was conducted at the National Renewable Energy Laboratory (NREL) comparing the time required to charge a fully discharged valve-regulated lead-acid battery in a photovoltaic (PV) system using on/off-shunt and pulse-width-modulated (PWM) charge controllers. In one system configuration, an on/off-shunt charge controller was only able to charge the battery to 61% of its rated capacityafter 16 days. In a subsequent test, a different on/off-shunt controller in a different PV system configuration readily charged its battery to 100% rated capacity in less than 6 days. It charged its battery as quickly as a couple different PWM charge controllers did in identical systems in a side-by-side comparison.
Original languageAmerican English
Number of pages8
StatePublished - 1998
EventNCPV Program Review Meeting - Denver, Colorado
Duration: 8 Sep 199811 Sep 1998

Conference

ConferenceNCPV Program Review Meeting
CityDenver, Colorado
Period8/09/9811/09/98

NREL Publication Number

  • NREL/CP-520-25352

Keywords

  • battery
  • lead-acid
  • photovoltaic
  • pulse-width modulated

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