sallylillian
LIFE MEMBER
A bit of a preamble so those with the knowhow can understand the reasoning and those that don’t are provided with info to avoid unhelpful questions or comments
Our first RV was a Yankee with two humungous and efficient Coleman roof air cons. There were no Hekis, just 2 off Fantastic vents. This worked great, we only use the AC when the temperature is in excess of circa 30c. The RV had what was called load shedding and it would progressively switch off appliances in a pre-set order to maintain amp consumption at the set breaker size.
Fast forward. New Flair in specification in 2014. Look at those lovely panoramic Hekis, 2 please with the extra electric control and rain sensor. We thought their control would be as competent as the fantastic vents but they were not, that’s a different story, and fortunately we also had specified 2 more Fantastic vents as well. That aside the Hekis brought more cons than pros in our opinion. When its hot, the sun’s rays beat through, so a good percentage of the time we had the blackout blind in use to some degree, and when they were open the bug screen was very often in play. In cold weather the black out screen helped with insulation. Factor in the leaves, dust and crap we did not get much benefit.
So we decided that we would not have any Hekis on the Morelo, we would have 2 Freshlights AC units which have a built in dome and as this is somewhat raised and small we hope there is little heat transmission. We are also having 2 fantastic vents again. The theory is that the Fantastic vents and the Freshlights (using just its low powered fan) ventilation with no cooling will provide a comfortable environment, instead of opening a Heki.
Now to the problem. Morelo will connect the Freshlights to the inverter side of the inverter charger for me (with caveats) so that the fans can run even when not on EHU, and of course with 640ah of Lithium together with power assist I could even run one on Full AC for a short time on pure inversion or use them both on puny EHU without concern. But what if I want to leave one or two on Full AC whilst on EHU and we are away from the van for a few hours and the EHU goes during our absence. That will play merry hell with the batteries and the inverter. So what I need is some sort of relay that I can switch on and off so that when required it senses EHU failure it switches the Freshlights off if I choose to set it that is.
So how?
Our first RV was a Yankee with two humungous and efficient Coleman roof air cons. There were no Hekis, just 2 off Fantastic vents. This worked great, we only use the AC when the temperature is in excess of circa 30c. The RV had what was called load shedding and it would progressively switch off appliances in a pre-set order to maintain amp consumption at the set breaker size.
Fast forward. New Flair in specification in 2014. Look at those lovely panoramic Hekis, 2 please with the extra electric control and rain sensor. We thought their control would be as competent as the fantastic vents but they were not, that’s a different story, and fortunately we also had specified 2 more Fantastic vents as well. That aside the Hekis brought more cons than pros in our opinion. When its hot, the sun’s rays beat through, so a good percentage of the time we had the blackout blind in use to some degree, and when they were open the bug screen was very often in play. In cold weather the black out screen helped with insulation. Factor in the leaves, dust and crap we did not get much benefit.
So we decided that we would not have any Hekis on the Morelo, we would have 2 Freshlights AC units which have a built in dome and as this is somewhat raised and small we hope there is little heat transmission. We are also having 2 fantastic vents again. The theory is that the Fantastic vents and the Freshlights (using just its low powered fan) ventilation with no cooling will provide a comfortable environment, instead of opening a Heki.
Now to the problem. Morelo will connect the Freshlights to the inverter side of the inverter charger for me (with caveats) so that the fans can run even when not on EHU, and of course with 640ah of Lithium together with power assist I could even run one on Full AC for a short time on pure inversion or use them both on puny EHU without concern. But what if I want to leave one or two on Full AC whilst on EHU and we are away from the van for a few hours and the EHU goes during our absence. That will play merry hell with the batteries and the inverter. So what I need is some sort of relay that I can switch on and off so that when required it senses EHU failure it switches the Freshlights off if I choose to set it that is.
So how?
