The results of field tests of the MS-14-10 solar battery for the period from October of 1996 to October of 1997 are presented. The tests were conducted at the TOR-station for monitoring atmospheric parameters at Tomsk Institute of Atmospheric Optics. The influence of ambient temperature, pressure, and solar radiation upon the performance parameters of solar battery is discussed in the paper. We also have studied variations in the short circuit current depending on time during a day and season. The recommendations are given concerning the use of solar batteries.