jerichorick
Senior Member
My last coach was a '05 Vectra. I had more problems with it and had it in the shop way too often. One of the weakest systems on that coach was the electrical. It was not stable and came up short all the time. New batteries and inverter did not help much. It was simply under powered for what the coach demanded.
What a new world we are living in now.
Power is not a problem. The Winnebago engineers did their homework when they were laying out the 2011 40U.
I have noticed from time to time that the inverter was on when we were on shore power. I was usually busy and didn't take the time to investigate because all was working well. This morning I had the 2 front A/C units on and I needed to make coffee for sleeping DW. We are on 30A service and were drawing 28A. I heated the leftover in the microwave for me and noted that the 28A didn't change. Then I ground the coffee and got the pot on. With this constant load I could now take the time to see what was going on. Here is what we have.
When the EMS is running near max the transfer switch in the Magnum inverter switches to the inverter mode if the load calling for power is on it. The EMS reports the inverter as assisting and by how much. In this case, 11A. So, my 30A shore power could do the cooling and the EMS didn't have to shed any loads. When load shedding is active it can be a bit inconvenient but then I can always (for the most part) start the generator.
We were boon docking at the in-laws a few months after we got this coach (2013). DW wanted to cook a turkey breast. That took about 3 hrs in the convection mode. About 4 hrs later the generator started to recharge the 6AGM house batteries. Last year I did change the ceiling halogens to LED's and that does extend battery life and give much better light. We truly love living in this coach.
My question for you folks reading this: are you seeing the same thing? How strong is your unmodified power? (LED upgrade is okay to have in place.) Do you feel as safe and secure as we do?
Thanks for your comments.
Rick Y
What a new world we are living in now.

I have noticed from time to time that the inverter was on when we were on shore power. I was usually busy and didn't take the time to investigate because all was working well. This morning I had the 2 front A/C units on and I needed to make coffee for sleeping DW. We are on 30A service and were drawing 28A. I heated the leftover in the microwave for me and noted that the 28A didn't change. Then I ground the coffee and got the pot on. With this constant load I could now take the time to see what was going on. Here is what we have.
When the EMS is running near max the transfer switch in the Magnum inverter switches to the inverter mode if the load calling for power is on it. The EMS reports the inverter as assisting and by how much. In this case, 11A. So, my 30A shore power could do the cooling and the EMS didn't have to shed any loads. When load shedding is active it can be a bit inconvenient but then I can always (for the most part) start the generator.
We were boon docking at the in-laws a few months after we got this coach (2013). DW wanted to cook a turkey breast. That took about 3 hrs in the convection mode. About 4 hrs later the generator started to recharge the 6AGM house batteries. Last year I did change the ceiling halogens to LED's and that does extend battery life and give much better light. We truly love living in this coach.
My question for you folks reading this: are you seeing the same thing? How strong is your unmodified power? (LED upgrade is okay to have in place.) Do you feel as safe and secure as we do?
Thanks for your comments.
Rick Y
