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Subject |
Author |
Date Posted |
Forum
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RE: Why won't 2000w inverter run 900w microwave?
Hi Almot,
The Xantrex Prowatt PSW 2000 watt unit is $355.00 from bestconverters.com
The OP's inverter looks suspiciously similar to the Prowatt, with just the display and outlets reversed.
I would tend to agree that a 2000 watt inverter for $200 would not likely be psw, unless it was purchased used.
I totally agree on the six volt batteries. They are being abused @ 140 amps of load.
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pianotuna
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06/16/13 10:10pm |
Tech Issues
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RE: Air Tabs Installed
Hi,
Mine are on the sides and top of the RV at the rear as recommended by the air tabs folks.
http://www.airtab.com/gallery/large/RVairtabpic.jpg
This is not my "ride" but is where I placed my tabs.
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pianotuna
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06/16/13 10:07pm |
Truck Campers
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RE: Inverter damage to alternator and charging circuit
Hi,
The Canuck tire inverters are xantrex rebranded.
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pianotuna
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06/16/13 09:58pm |
Class A Motorhomes
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RE: Breaktrough in solar
Hi,
So where do I put my big magnifying glass on the RV?
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pianotuna
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06/16/13 08:58pm |
Tech Issues
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RE: an upgrade to gas buddy?
Hi 4huskers,
You can manually put in the tank size and your mileage.
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pianotuna
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06/16/13 08:46pm |
Roads and Routes
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RE: Almost embarrassed to ask....
Hi,
Rent one for a week.
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pianotuna
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06/16/13 08:44pm |
Beginning RVing
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RE: Battery charging, Again!!
Hi,
Use both together for the fastest possible charge.
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pianotuna
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06/16/13 08:32pm |
Class A Motorhomes
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RE: Softer Ride
Hi,
It may be unwise to inflate to a lower pressure than the sticker on the vehicle.
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pianotuna
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06/16/13 08:22pm |
Class C Motorhomes
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RE: newbie question - electrolysis
Hi,
Run, don't walk, away.
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pianotuna
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06/16/13 08:15pm |
Beginning RVing
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RE: Anyone camp here???
Hi,
I would stay here if I needed power.
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pianotuna
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06/16/13 08:10pm |
Class A Motorhomes
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RE: Propane RV air conditioner...?
Hi,
Yes at one time they did exist. The Absorption cycle is not too efficient so it would use LOTS of propane. Cool down time would be similar to the fridge as well. A large cubic foot per minute fan would still be needed, so a large battery bank would be required.
If you live in a dry climate an evaporative cooler may be a better choice for a low electrical load.
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pianotuna
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06/16/13 08:03pm |
Truck Campers
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RE: Air Tabs Installed
Hi Art,
Thanks for the picture. I guess I'll have to try some in that location on my cabover. The ones on the rear did make a huge wind noise difference.
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pianotuna
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06/16/13 07:50pm |
Truck Campers
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RE: How much power does solar panels actually generate?
Hi acei,
2oldman has just moved over to 24 volts and has a dc to dc converter from Victron to meet his 12 volt needs.
So far it appears he is getting a larger solar harvest, but he has not run it in winter time yet.
BTW Victron makes a better power meter than anyone else--and it is a bit cheaper than the nearest competitor. Talk to mena about his.
I'm a bit of curmudgeon so I do not have an amp-hour counter. I'm also way out in left field on batteries as almost no one successfully uses a multiple 12 volt array.
I believe in saturation charging, which means 14 to 16 hours at a fairly low amperage (1/5 of an amp). That's usually impossible to do with solar, for the sun is rarely up for 16 hours. Because of having two banks and appropriate switching, I can use one bank to do a saturation charge on the other, if I choose to.
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pianotuna
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06/16/13 07:43pm |
General RVing Issues
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RE: How much power does solar panels actually generate?
Hi acei,
There are solar insolation maps available for the whole world--just google for a link.
24 or even 36 volts has many advantages over 12 volt. Here are some:
Wire size is rated in amps--so a #10 wire @ 12 volts can only do about 30 amps = 360 watts. Where as #10 wire @ 36 volts can do 1080 watts.
six six volts in series removes the issue of parallel balanced wiring.
The components in an inverter don't have to work as hard and are therefore likely more efficient when going from 36 volts DC to 120 volts AC.
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The parallel issue can be mitigated somewhat by using balanced wiring (see the smartgauge site if you wish to understand that better).
Statistically speaking the greater the number of cells the more likelihood there is of a failure. The other side of the coin is that when in series each cell must provide the full number of amps demanded. In parallel each cell only caries part of the load. For example:
6 series 6 = 12 volts; put a 100 amp load on and each cell must produce 100 amps. The weakest cell will limit the flow of current--so if one cell is "weak" and can only do 95 amps the bank will have that as an upper limit.
12 parallel 12 = 12 volts: put a 100 amp load on and each cell needs to produce only 50 amps. The weakest cell will NOT limit the flow of current so if one cell could do only 40 amps the other paralleled battery would do 60 amps to make up the difference (hopefully that never happens).
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The other problem with a 12 volt bank is that one weak cell may cause that battery in the parallel array to act as a parasite on the others, fairly quickly drawing the capacity of the other batteries down to the weakest cell.
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Right now on another thread someone is having issues trying to run a microwave on twin six volt jars. It runs for about four seconds and then the microwave shuts down. The inverter doesn't appear to be going to fail over condition. His problem is simple. Six volt batteries, with their thicker plates, are not intended for high amperage loads. Twin 12 volt batteries would easily be able to do what he wishes, if they are wired like this:
http://www.rubyorchid.com/RV/images/Pianotuna12V.png
As it often doesn't cost a dime more to do this, I think it is worth the trouble.
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pianotuna
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06/16/13 07:34pm |
General RVing Issues
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RE: Why won't 2000w inverter run 900w microwave?
Hi MP,
Good choice on returning to the installer.
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pianotuna
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06/16/13 07:08pm |
Tech Issues
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an upgrade to gas buddy?
Hi,
Gasbuddy now does routing and prices along the route!
http://www.gasbuddy.com/Trip_Calculator.aspx
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pianotuna
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06/16/13 04:19pm |
Roads and Routes
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RE: Air Tabs Installed
Hi Art,
I'm glad it reduced the noise.
Can you post a more distant picture of the installation--I want to see where they actually are and I can not figure it out from the close ups that are already online.
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pianotuna
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06/16/13 04:06pm |
Truck Campers
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RE: Why won't 2000w inverter run 900w microwave?
Hi horton,
Thanks for letting me know that is a "wrong path" regarding the mode of failure. I'll change my post.
That would have to be some whooping big capacitor to last 4 seconds at ~ 100 amps.... like about the size of the 'supercapacitors' they put in electric cars at a couple of hundred dollars apiece....
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pianotuna
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06/16/13 03:58pm |
Tech Issues
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RE: Why won't 2000w inverter run 900w microwave?
Hi,
If the microwave works fine on shore power then try monitoring the voltage when you turn on the microwave. If it dips too low that may be caused by the inverter not being able to demand enough from the battery bank.
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pianotuna
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06/16/13 01:43pm |
Tech Issues
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RE: MPPT controller - voltage sensing without separate wires?
Hi,
Battery voltage sense wires just make sense to me. Even on a PWM Controller.
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pianotuna
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06/16/13 12:29pm |
Tech Issues
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