Block Heater - Extension Cord

First Name
Gary
Joined
Mar 14, 2021
Threads
5
Messages
20
Reaction score
74
Location
Dallas, TX
Vehicle(s)
2021 Bronco Sport
It does run at 485 watts.
it does take about 2 hours in single digits, and about an hour in double digits.
i run a 15 amp outdoor. 12 gauge 25’ cord to it. The cord does not get hot or overheat. It has no issues.

i actually plug 1 cord into the rear of my Bronco behind the tire. It splits off and keeps my Ecoflow 1Kw powerstation recharged, and my fridge running, as well as it trickle charges my starter battery. Through a Bluetooth switch and the power cord running from my powerstation through the firewall and into the engine bay to run the engine block heater. Even when everything is pulling at maximum power. It pulls just under 15 amps. And the extension cord is of no issue in as far as overheating. The engine heater is on a two switch system, with one switch on a blue tooth activated switch, and the final switch that will turn the engine block heater on or off based on ambient outdoor temps being below 30 degrees.

equipment…
Iceco fridge APL35, with 250wh battery.
Ecoflow Delta. 3 plus
Ecoflow Alternator charger. (Reverse trickle charges started battery when being charged by AC and/or solar)
Renogy portable 400 watt solar panel X2 (Used when stopped for extended periods)

on good sun days with solar plugged in along with AC. The Ecoflow charges at a rate of 2100 watts. When the engine block heater is running. Trickle charging to the starter battery, and the fridge running. I can still maintain a charge rate of over 1000 watts.

at night with no solar… I can still maintain a charge rate of over 300 watts with everything running.

I very very rarely have any issue with running out of battery power from the power station ever.

whats cool, is that when I’m out and about and stopping for a few hours in the extreme cold. The powerstation will keep my engine block warm while I’m at dinner or the movies or shopping. I have remote start. And if any battery, starter or powerstation gets low, it notifies me on my phone, ford app, ecoflow app, and I can remote start the engine, and the alternator charger Will kick in to charge the power station, and the engine takes care of everything else. when the engine starts there is another relay circuit that will cut power to the engine block heater automatically. The altenator charger automatically reverses charge direction from trickle charging of starter battery to charging the power station.

suffice it to say. Get you an outdoor heavy duty 15 amp 12 gauge cord and you will be good.
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