Battery and charge controller evaluations in small stand-alone PV systems
- Sandia National Labs., Albuquerque, NM (United States)
- Florida Solar Energy Center, Cape Canaveral, FL (United States)
- K-Tech Corp., Albuquerque, NM (United States)
We report the results of to separate long-term tests of batteries and charge controllers in small stand-alone PV systems. In these experiments, seven complete systems were tested for two years at each of two locations: Sandia National Laboratories in Albuquerque and the Florida Solar Energy Center in Cape Canaveral, Florida. Each system contained a PV array, flooded-lead-acid battery, a charge controller and a resistive load. Performance of the systems was strongly influenced by the difference in solar irradiance at the two sites, with some batteries at Sandia exceeding manufacturer`s predictions for cycle life. System performance was strongly correlated with regulation reconnect voltage (R{sup 2} correlation coefficient = 0.95) but only weakly correlated with regulation voltage. We will also discuss details of system performance, battery lifetime and battery water consumption.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 10161796
- Report Number(s):
- SAND-94-1560C; CONF-941203-2; ON: DE94014252; BR: GB0103012
- Resource Relation:
- Conference: 1. world conference on photovoltaic energy conversion,Waikoloa, HI (United States),5-9 Dec 1994; Other Information: PBD: [1994]
- Country of Publication:
- United States
- Language:
- English
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