Steve&Steph Posted October 24, 2020 Share Posted October 24, 2020 Is there such a thing as an inverted that can be plugged in to 110V and function on a type of “pass through” but pull from the batteries when the 110V is removed. I would like to ensure power to my bilge heater if we lose dock power. thanks Quote Link to post Share on other sites
IndyChap Posted October 24, 2020 Share Posted October 24, 2020 Triplite inverter charger. https://www.tripplite.com/products/power-inverters-inverter-chargers~18-76 Quote Link to post Share on other sites
cyclops2 Posted October 24, 2020 Share Posted October 24, 2020 You will need to know the watts of your heater. To buy the correct inverter. Quote Link to post Share on other sites
Bt Doctur Posted October 25, 2020 Share Posted October 25, 2020 So if you lose power and the inverter takes over how long do batteries last before they also go dead? Best option is to pull, block, winterize Quote Link to post Share on other sites
cyclops2 Posted October 25, 2020 Share Posted October 25, 2020 The ONLY TRUE way to prevent ALL types of freezing damage. The heater sticks ON & catches fire ? Impossible ? Quote Link to post Share on other sites
Iggy Posted October 25, 2020 Share Posted October 25, 2020 7 hours ago, Bt Doctur said: So if you lose power and the inverter takes over how long do batteries last before they also go dead? Best option is to pull, block, winterize Heaters pull a lot of amps. The batteries would be likely to last an hour. You must do the math to battery amp hours and the load on the inverter. Quote Link to post Share on other sites
Chap243 Posted October 26, 2020 Share Posted October 26, 2020 I agree with the others above. A heater will draw a lot of amps and drain any good battery quickly. It`s probably best to drain the water from the block and manifolds. Quote Link to post Share on other sites
Steve&Steph Posted October 26, 2020 Author Share Posted October 26, 2020 Block and manifolds are empty. Heater is more for piece of mind. It’s only 400 watts. Quote Link to post Share on other sites
Chap243 Posted October 27, 2020 Share Posted October 27, 2020 A 100 w light bulb will do about the same thing as a heater. Quote Link to post Share on other sites
cyclops2 Posted October 27, 2020 Share Posted October 27, 2020 Not true . Quote Link to post Share on other sites
Iggy Posted October 27, 2020 Share Posted October 27, 2020 23 hours ago, Steve&Steph said: Block and manifolds are empty. Heater is more for piece of mind. It’s only 400 watts. You need to do the math. 400watts at 120v A.C. is just under 4amps. Now the inverter must convert 12V D.C. into 120v A.C. So 400W being pulled out of a 12V battery is about 30amps.The inverter itself will also consume power. Now add a 5 to 10% loss depending on how good it is. So 33 to 36 amps. Most group 24 batteries are rated close to 70 amp hours. So that would give you just over 1 hour of use unless you want to kill your battery. Quote Link to post Share on other sites
cyclops2 Posted October 27, 2020 Share Posted October 27, 2020 Excellent Iggy. Quote Link to post Share on other sites
Steve&Steph Posted October 28, 2020 Author Share Posted October 28, 2020 9 hours ago, Iggy said: You need to do the math. 400watts at 120v A.C. is just under 4amps. Now the inverter must convert 12V D.C. into 120v A.C. So 400W being pulled out of a 12V battery is about 30amps.The inverter itself will also consume power. Now add a 5 to 10% loss depending on how good it is. So 33 to 36 amps. Most group 24 batteries are rated close to 70 amp hours. So that would give you just over 1 hour of use unless you want to kill your battery. Right, I get that. Heater on at 40 off at 60 heating a small engine bay so it’s not constantly running. 2 group 31 batteries. Quote Link to post Share on other sites
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