I read that using the block heater costs about $1.50 a day.I plug mine in all winter here and never notice any change on my bill. Guess that's cuz we have cheap rates, and man I am thankfull for that

Myself if the truck is at home I'll plug in when its parked in the garage. I use the heat in the shop to keep it from freezing so the heat not wasted being parked outside.

ive owned my truck for 6 years and it had a block heater when purchased, never plugged it in though. i wander if they go bad from sitting concidering its submerged in the coolant system. i'm liable to plug it in and blow every circuit breaker in the house or give my charging system a 110v super charge!

I have a timer on mine.On at 2 am i start it at 7:30

ive owned my truck for 6 years and it had a block heater when purchased, never plugged it in though. i wander if they go bad from sitting concidering its submerged in the coolant system. i'm liable to plug it in and blow every circuit breaker in the house or give my charging system a 110v super charge!

Actually it is possible but most times out of ten the heater continues to operated even while shorted to the coolant but you know that because you feel a tingle when you touch the engine.

I have used my block heater a bunch... stretched the OEM batteries an extra year that way. I never noticed a change in the electric bill or when I plugged in the stock tank heater. I think both have thermostats. I have a HD timer & have used that as well. Great if you know for sure when you're going to launch. There was never a noticeable change when I ran a business from my ex-s place, even thouh all the machines were electric.Russ

I always start plugging mine in when the temps start dropping down at night in the Fall. It does save a LOT of wear and tear on the batteries. I believe the block heater is 750 watt which would draw about 6.25 amps give or take. I try to use as short an extension cord as is possible to limit voltage drop and plug the block heater, extension cord and all into a 1850 watt capable timer that turns on the power about 4 hour before starting up the truck in the morning. That way the wife has a quicker start and faster heat on the way to work in the morning. I also install the hood grill covers to block out cold air and hold in what heat gets generated by the block heater and when the engine is running.

Like here not to long from now I'll be firing up a block heater at night... Like this morning low is 50*F and by mid October I know it will be close to 32*F at night... My winter fronts will be installed by then too... Strange to still snow in the Seven Devils Mountain range at this time of the season...