Xantrex Technology PROsine 2.0 - Manual (Page 11)

Safety
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9. If battery acid contacts skin or clothing, wash immediately with soap and
water. If acid enters your eye, immediately flood it with running cold water
for at least twenty minutes and get medical attention immediately.
10. If you need to remove a battery, always remove the ground terminal from the
battery first. Make sure all accessories are off so you don’t cause a spark.