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neufox47 ![]() Newbie ![]() Joined: 02 Aug 2020 Location: California Online Status: Offline Posts: 6 |
![]() Posted: 06 Aug 2020 at 12:09am |
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It’s definitely the start (restart) that is causing the overload. When it is hot out and the sun is on the roof it is more likely to kick off. Seems like the restart of the compressor after using it for a bit also takes more wattage than the first start. It works at 1300 feet but not reliably above 4K. The generator “seems” like it is catching up but not fast enough to avoid an overload. The generator voltage will drop to 70 or so then get back to about 100 before overloading. Seems like the genny just isn’t quite fast enough to catch up.
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offgrid ![]() Senior Member ![]() Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
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The a/c fan runs continuously, the compressor cycles on and off as needed to keep the rpod cool. The compressor is what needs high current to run, and even higher to start. You can tell when the compressor starts and stops by listening to the change in sound and the change in load on the genny. The fan doesn't take much current at all to run.
The easystart does a great job helping in starting the a/c. compressor. It will not help run the a/c compressor at all once its started, the genny has to be able to do that on its own. If your genny can already start the a/c compressor but can't run it once started and you're expecting the easystart to help run it then you will be disappointed. Just want to be sure we're clear on the difference. The easystart instructions are good and if you have any questions they are pretty responsive. The hardest part is that you are on the roof doing this. Lay a piece of plywood up there so you don't damage the rpod roof and be sure to have a stable ladder.
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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neufox47 ![]() Newbie ![]() Joined: 02 Aug 2020 Location: California Online Status: Offline Posts: 6 |
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Just bought the micro-air easy start for our 2017 179. I have a Westinghouse Igen4200 inverter generator. I’m shocked it can’t power it reliably but at any sort of elevation (4-6k) when hot out the AC will overload it. We have a 1 year old, so AC mid-day for naps is a necessity. Last weekend we had to idle the truck so he could sleep.
Any good instructional videos on installing one of these? I found one YouTube video but it is not on an Rpod. |
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Wvoorhies ![]() Newbie ![]() ![]() Joined: 18 Aug 2019 Location: TX Online Status: Offline Posts: 1 |
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Just did the same. Very happy now.
The situation was bad. Purchased the yamaha 2000is v2 pair with parallel cable. Overloaded generators in every permutation I could come up with. The A/C would not start. Today, happy to test and could not overload the genies with several scenarios running A/C. I was pissed about the yamaha performance, now I think it was the (and I will get this wrong) lock start amperage of the dometic unit causing the issue and overloading the generators. I can start A/C with eco mode, run the microwave, fridge, water heater, pump, etc. First post. Wish I read this sooner. Bought the 195 in August 2019. I paid $200 ($500 total, including the 364) for the installation of the micro-air 364 instead of scaring my girlfriend to death with DIY. Micro-air recommends rv spots nation wide, and one was close by NW Houston. |
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offgrid ![]() Senior Member ![]() Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
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Ok, so some form of pulse or variable charge rate battery charging. I'm not going to debate that one, there are all sorts of opinions out there about how best to and not to charge a PBA battery. But that's not really about maximizing PV ouput at low light levels. For that ar coatings are probably the most practical approach. Many if not most module manufacturers use ARC glass already.
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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StephenH ![]() podders Helping podders - pHp ![]() ![]() Joined: 29 Nov 2015 Location: Wake Forest, NC Online Status: Offline Posts: 6417 |
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StephenH
Happy is the man that findeth wisdom,... ouR escaPOD mods Former RPod 179 Current Cherokee Grey Wolf 24 JS |
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Olddawgsrule ![]() Senior Member ![]() Joined: 20 Sep 2017 Location: New Hampshire Online Status: Offline Posts: 1014 |
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Frequency/back feed recovery sounds a bit like perpetual motion to me. PV cells are just big ol' diodes, ie, they are dc devices. They work best if you keep them at a stable operating point on their IV curve and you can't get more energy out of them by dithering with that once you find it for a given set of conditions, which is what the MPPT does. In fact fiddling with that operating point will inevitably reduce performance. And if you back feed a solar module it absorbs energy. We actually made roof solar arrays that doubled as a snow melt system by back feeding them at one point. Dumb, yes i know, but the customers wanted it. Once you get your trailer back the top of the cap might be a good place for a big PV module, looks like you have a larger available surface area there than on the trailer roof. Add an MPPT and long cable and you could park the truck in the sun while the trailer stayed in the shade. Just a thought.... The Frequency/back feed wasn't to the panels. I agree, that doesn't work. That's were the electronic's to the battery came in. Like a MPPT on steroids or so was the concept. The concept came from the Open coil/transistor build they did. That started as a better charging system yet turned into a great battery maintainer. Many of the same principles are in the better commercial battery maintainers you can buy off the shelf now. Theirs was built to maintain a larger battery bank (mainly LA's).
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offgrid ![]() Senior Member ![]() Joined: 23 Jul 2018 Online Status: Offline Posts: 5290 |
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Frequency/back feed recovery sounds a bit like perpetual motion to me. PV cells are just big ol' diodes, ie, they are dc devices. They work best if you keep them at a stable operating point on their IV curve and you can't get more energy out of them by dithering with that once you find it for a given set of conditions, which is what the MPPT does. In fact fiddling with that operating point will inevitably reduce performance. And if you back feed a solar module it absorbs energy. We actually made roof solar arrays that doubled as a snow melt system by back feeding them at one point. Dumb, yes i know, but the customers wanted it. Once you get your trailer back the top of the cap might be a good place for a big PV module, looks like you have a larger available surface area there than on the trailer roof. Add an MPPT and long cable and you could park the truck in the sun while the trailer stayed in the shade. Just a thought.... |
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1994 Chinook Concourse
1995 RV6A Experimental Aircraft 2015 Rpod 179 - sold |
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Olddawgsrule ![]() Senior Member ![]() Joined: 20 Sep 2017 Location: New Hampshire Online Status: Offline Posts: 1014 |
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Thank you and thank you! The purpose of this build was two fold. I want a over-night style camper I don't have to tow and I wanted to learn this foam built system. My build thread is here: http://tnttt.com/viewtopic.php?f=55&t=71879 It been a great learning process and I like the system. Several things I would do different, LOL, learning curve thing! |
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GlueGuy ![]() Senior Member ![]() ![]() Joined: 15 May 2017 Location: N. California Online Status: Offline Posts: 2702 |
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Our earliest panels were from a company called SunWize. Where we are on the west coast, and close to it, we get a lot of days with diffuse light because of the frequent fog/marine layer. Those panels and the PWM controllers we used at that time just did not deal well with those conditions, and we often had to compensate for that frequent fog. Later on, we switched to some Trina panels (yes, Chinese made) and (still PWM) controllers. Wow, those panels really worked well, even in the fog. We even set the panels for a fairly high angle ~~ 50 degree tilt. Even though summer sun was off-angle, and often in the fog, those suckers just cranked electrons. In the winter, when the fog is not as persistent, they worked even better. Still later on, we switched to MPPT controllers, and things got even better. The MPPT controllers allowed us to string together several panels and increase the overall voltage. So even if the panels were only producing 25 or 30 percent of rated, the MPPT controllers allowed us to extract what was available. With the PWM controllers, the panels had to be at around 75-80 percent before we could extract anything.
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bp
2017 R-Pod 179 Hood River 2015 Ford F150 SuperCrew 4WD 3.5L Ecoboost |
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