Amps Draw and Voltage Drop Question 2
Question 2 -17 Oct -------- There are no dumb questions--until now! If the furnace draws 8 amps and there is a 0.2v drop when it is on, and you change the positive wire to the furnace to a fatt...
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Thanks. So just live with it as is I guess. The 0.2v drop doesn't matter except when the batts are low and running an inverter load gets the voltage near the low voltage alarm. Then the furnace comes on and pushes it over the edge. Have to shut the furnace off until the inverter job is done.
The 8 amps doesn't matter except when the generator is on to charge the batteries. 75 amps charging drops to 67 amps every time the furnace comes on, which adds to gen running time. Same idea, you can shut off the furnace, but then pay the price after the batts are charged in more furnace time eating the AH you just put in to reheat the RV.
I suppose the LFP guys like their furnace fans spinning faster due to the higher voltages they run at.
I measure voltage drop by seeing it drop on the Trimetric monitor as soon as the furnace comes on. Right after the furnace shuts off, the voltage comes back up part way and then up more only slowly.
The 8 amps doesn't matter except when the generator is on to charge the batteries. 75 amps charging drops to 67 amps every time the furnace comes on, which adds to gen running time. Same idea, you can shut off the furnace, but then pay the price after the batts are charged in more furnace time eating the AH you just put in to reheat the RV.
I suppose the LFP guys like their furnace fans spinning faster due to the higher voltages they run at.
I measure voltage drop by seeing it drop on the Trimetric monitor as soon as the furnace comes on. Right after the furnace shuts off, the voltage comes back up part way and then up more only slowly.
