| Author | Message | ||
| Bill Glenn (Homegrowndiesel)
Registered Member Username: Homegrowndiesel Post Number: 3 Registered: 7-2006 Posted From: 71.242.165.196 Rating: N/A |
First try for the new bedroom AC high efficiency rooftop air conditioner and inverter running off the batteries proved to be a cool experience. Sometimes the math (or specs) just don't add up, but I was pleased that we still had juice after running the ac for the night without the generator running or plugged into power. I checked the amp draw and was pleased to see 10.4 amps @ 110 vac, right at the stated Dometic specs(10 amps). Was equally pleased to plug into a 20 amp receptacle and run BOTH roof airs at the same time with the power share feature of the RS 3000 inverter. The cycling of the rear ac would float the inverter from slight draw FROM the batteries when the compressor was on, to CHARGING of the batteries when compressor was off. Ain't technology grand! I am going to try 1 week and see the battery condition with current outside tempratures. Anyone else messing with this? Bill Glenn | ||
| John MC9 (John_mc9)
Registered Member Username: John_mc9 Post Number: 75 Registered: 7-2006 Posted From: 66.217.108.48 Rating: N/A |
Bill - Two questions: What brand inverter? How many (and what type/brand) batteries in your bank, and in what configuration? | ||
| David Evans (Dmd)
Registered Member Username: Dmd Post Number: 71 Registered: 10-2004 Posted From: 71.125.9.62 Rating: N/A |
Hey Bill, also what type hi eff. rooftop? and could you overnite a Hardees steak bisquit to NY please. We enjoyed all your pictures from the Delaware rally, and seeing the "anteater spacemobile" again. She sure getspeople talking. Glad your making progress. Any changes in the gen/alt setup?. thanks dave&dori | ||
| Jim Stewart (H3jim)
Registered Member Username: H3jim Post Number: 262 Registered: 10-2004 Posted From: 68.7.236.108 Rating: N/A |
What was the battery voltage in the morning? | ||
| Bill Glenn (Homegrowndiesel)
Registered Member Username: Homegrowndiesel Post Number: 4 Registered: 7-2006 Posted From: 71.242.168.254 Rating: |
OK John Xantrex! Not my first choice, because I want grid tie as the most economical and efficient Decentralised Generation scheme, 85 % efficiency has been a concern, but with the good deal I got from my local dealer and the facts documented I cant complain. Better than I expected for the $$$. 6, 6 volt Interstate L16's Series - parallel, 415 Ah each, paralleled 2 x 3 = 1245 AH 12 volt. (415x6=2490 divided by two to get 12 volts = 1245) Hey Dave & Dori The best I could find for the money and efficiency was the dometic 13,500. btu high efficiency model. Fedx, UPS, or Snail Mail, might not be Hardee's specs though. We had a great time, see you at the next one. We were glad to be COOL for the evening. Yea thats progress!!!!! Not much changes to the genset yet, but,,,, I see the field coils are starting to get crispy, and I do not think this 30 million dollar unit can last much longer. Now do not get me wrong, we have stressed this alternator with 300 amps for hours with low rpm and it's associated low cfm cooling, and most stressed conditions. But she has not yet given up the ghost,,,,,YET. I want to try the Polar Power genset next. Show me the money! Hey Jim, Static or under load? when drawing compressor load, batt volts ran about 11.9 to 12.1, but in static conditions volts ran 12.3 to 12.4. My Trimetric meter properly programed??????????????????????????????????????? ?????? ??? ? ? I think. Stated 70-75% battery capacity left. @ 50 % draw down. I think the run time was about 75 % due to ambient conditions, insulation, and area to cool. Not to shabby. I will stress this combo in the upcoming Years? Months, ??? days, ? and let everyone know the results. Anyone else have experience with this please chime in. Bill | ||
| Tom Caffrey (Pvcces)
Registered Member Username: Pvcces Post Number: 987 Registered: 5-2001 Posted From: 65.74.70.16 Rating: N/A |
Bill, if I understand you right, this is a power supplementing design of inverter? That without changing anything but the load, the inverter makes the batteries go from charging to discharging and back to charging? I knew that the SW series of older Trace units could do that, but I had not known of any other brand that could. I checked their brags on their site, and there is no direct reference to power supplementing, that I saw. Thanks. Tom Caffrey PD4106-2576 Suncatcher Ketchikan, Alaska | ||
| Bill Glenn (Homegrowndiesel)
Registered Member Username: Homegrowndiesel Post Number: 6 Registered: 7-2006 Posted From: 71.242.133.115 Rating: N/A |
Yes Tom you are correct on the power supplementing. I like the adjustable (power share) amp draw feature. You can set the power share from 5-50 amps in 5 amp increments and the inverter will draw that amount as the max available, thereby avoiding popping breakers on whatever you are plugged into. Plugged into a 50 or 30 amp receptacle this thing gives you 150 amp 3 stage charges, drop the power share back to whatever breaker rating you have and it dropps the charge rate. I like this unit. Until I saw it on Nick Badame's bus I had not realy seen it advertised, then when Bruce Knee gave me such a good price, I had to try it. I think they should begin bragging on this feature, its great. My first choice for an inverter was Outback, that was until I got this deal on the Xantrec RS3000, for hundreds less from Bruce. I like the design of the outback, the efficiency, and the fact that the guys (engineers) that started the company worked for Trace, Xantrec, and one of the other companies that all got bought up. I would like to support the guys but could not pass on this deal. Will Try the Outback next. I understand most busnuts probably need a 24 volt inverter, which would be better due to the lower current (1/2 that of a 12 volt system), and better battery utilization. Our eagle came with an 12 volt electrical system and we went with that. I FEEL that the large charging system that came on our busses is the best way to charge our house batteries as we move form one location to another. We get to our destination and our batts are charged.If we had a 24 volt system what little 12 volts are used directly from the house batts can easily be handled by a converter. unless you are planning on large 12 volt draws?? for what? Anyway I digress. Is your system 24 volts? Bill Glenn Slightly Modified 73 Eagle o5 Seaford, Delaware | ||
| Tom Caffrey (Pvcces)
Registered Member Username: Pvcces Post Number: 989 Registered: 5-2001 Posted From: 65.74.70.16 Rating: N/A |
Hi, Bill. Our system is 12 volts. Thanks for the confirmation on the power supplementing feature. I've recently been told that Xantrex plans on dropping the SW line altogether, and I was wondering what to look for if they do that. One day, we will have power supplementing, too. Tom Caffrey PD4106-2576 Suncatcher Ketchikan, Alaska | ||
| Nick Badame Refrigeration Co. (Dnick85)
Registered Member Username: Dnick85 Post Number: 47 Registered: 2-2006 Posted From: 66.174.79.238 Rating: N/A |
Hi Tom, The RS3000 does alot more then Bill has discribed. The power monotering alone is one of the reasons that I choose it. Plus, the power share feature, 3 stage charging, and the network enabled feature is awsome too. 12v setup works with my setup very well. Nick- | ||
| Geoff (Geoff)
Registered Member Username: Geoff Post Number: 896 Registered: 12-2002 Posted From: 71.211.116.93 Rating: N/A |
This is all very confusing to what the inverters we are talking about are doing. I have an SW2512MC true sine wave inverter and what it does is lock the inverter sine wave with the grid sine wave so it can supplement the load with inverter power. What the RS3000 is doing is "power sharing" the amp draw from the grid so the battery charging of the inverter drops down when the inverter is under a load. The SW will also power share automatically when you set the shore power cord size and amps, but the RS will not sync with the incoming grid power. I think what Bill must have been doing is running one air off the grid (shore power) while the inverter was running the other roof air and only using the battery charger of the inverter to make up the inverter/battery load. Unless you understand how the SW works this may not seem clear. Anyway, I love how the SW works and would not hesitate to spend the extra bucks again. --Geoff '82 RTS AZ | ||
| Nick Badame Refrigeration Co. (Dnick85)
Registered Member Username: Dnick85 Post Number: 49 Registered: 2-2006 Posted From: 66.174.79.237 Rating: N/A |
Hi Geoff, The RS3000 passes 2 legs of 50amps through it. And also provides 2 legs while in invert mode. You would need 2 sw2512's to do the same thing. So the power share is only robbing 1 leg and the other is providing power for the coach all the time. Nick- Link- http://www.xantrex.com/web/id/176/p/1/pt/29/product.asp (Message edited by dnick85 on August 30, 2006) | ||
| Craig (Ceieio)
Registered Member Username: Ceieio Post Number: 243 Registered: 12-2004 Posted From: 207.101.213.58 Rating: N/A |
Geoff - I read the lit and see what you mean... the operation of power share and suppliment seems quite different. Either would be useful, just different depending on what you want. Craig - MC7 Oregon | ||
| Bill Glenn (Homegrowndiesel)
Registered Member Username: Homegrowndiesel Post Number: 7 Registered: 7-2006 Posted From: 71.242.217.17 Rating: N/A |
Hey Geoff Good call on the power supplementing Issue. Tom, Sorry for giving you the wrong answer. I had previouly checked the amp draw on one of the air conditioners with a clamp on meter, and I got a reading of 10.4 amps AC. I thought for sure the rs 3000 must be suplementing the power, because that would be 20.8 amps with both air conditioners running. When running both airs, I was looking at my Trimetric DC meter when the bedroom ac unit was cycling the compressor after a couple of hours running do to the thermostat being satisfied. I watched the dc meter float between charging and discharging. Assume. tsk tsk After reading Geoff's posts I had a good excuse to go out to the bus. I fired up both ac units and looked at the meters. The rs 3000's meter was reading ac amps in 18.9. I watched the meters as I cycled 1 ac on and off. Again the dc trimetric meter went fron charge to discharge, I was perplexed. After plenty more tests (and some reading)I have found that the way I have this unit wired (120 ac, both legs wired together) I cannot run 1 ac off inverter and 1 ac off of shore power. ( do not know if it would do that either) As it turns out, the two ac units are running off of the 20 amp circuit without supplementing from the inverter function. (I have not tried to start both at one time "yet" ) The shift to discharge was due to some dc loads being on. When the compressor would start, and the rs 3000 would stop charging, and the dc lights would show the slight discharge I had assumed was the inverter supplementing. When the compressor cycled off the charging would begin and show dc input. I finally figured the discharge was due to the dc lights I had on and not the inverter function. I am going to have to check the accuracy of that meter. Thanks for the accuracy and clarification Geoff. Good reason to read the litrature. (and these boards) Bill |
