A fire chief issues the warning after three blazes linked to batteries in recent days.
The proposed facility will cover more than 2,000 acres of Wiltshire countryside.
Brett Conway, 66, then bullied his parents and ex-partner in a bid to get the allegations dropped.
More than 14,000 people have signed a petition against the plans, which would cover rural land.
A 2,000 acre solar farm is proposed to stretch across countryside in several Wiltshire villages.
