Dont force 0 state instead of min_power unless explicit config set (#2107)

esphome/components/output/float_output.cpp

@@ -17,6 +17,8 @@ void FloatOutput::set_min_power(float min_power) {
   this->min_power_ = clamp(min_power, 0.0f, this->max_power_);  // Clamp to 0.0>=MIN>=MAX
 }
 
+void FloatOutput::set_zero_means_zero(bool zero_means_zero) { this->zero_means_zero_ = zero_means_zero; }
+
 float FloatOutput::get_min_power() const { return this->min_power_; }
 
 void FloatOutput::set_level(float state) {
@@ -31,7 +33,7 @@ void FloatOutput::set_level(float state) {
 #endif
   if (this->is_inverted())
     state = 1.0f - state;
-  if (state == 0.0f) {  // regardless of min_power_, 0.0 means off
+  if (state == 0.0f && this->zero_means_zero_) {  // regardless of min_power_, 0.0 means off
     this->write_state(state);
     return;
   }