03.10.2015

Rv power inverter for sale

With our combined 25 years in the power inverter business we will find the best solution for your needs.
By Gary Brinck Featured Posts, Mods, RV Guides After making the decision on your RV inverter purchase, you may just need to start your DIY RV inverter install. If you went with a small inverter (around 75 watts), then it can be plugged into a cigarette lighter outlet.
In order to reduce the voltage loss, you need to install the inverter as close to your batteries as possible.
As an example, using the table below assume that you will be installing a 2000 watt inverter (Scroll top to bottom and find 2000 watts). It will be connected to the batteries with 5 feet of #4 AWG cable (scroll right to left from the 2000 watt load till you find the 4 column). The best approach is simply to use the largest size that will fit in the inverter’s terminals. If you have trouble finding suitable wire for your RV inverter install, automotive battery cable or jumper cables are readily available in 4, 6, and 8 AWG (American Wire Gauge). Welding cable comes in larger sizes, but is expensive as many times you have to buy a whole spool. The AC (Connecting the inverter to the RV electrical system) side of the RV inverter install can get more complicated. However you do it, you absolutely must ensure that you do not have your converter turned on when the inverter is on.
Since neither the inverter nor the converter are 100% efficient, each trip that current makes around the loop will waste some power as heat. The most elegant (and of course, most expensive) solution is to connect the RV inverter directly to RV’s AC distribution boxthrough a transfer switch (keep in mind the type of switch used varies based on the power of the RV inverter and if you have a generator).
At the other extreme, you can run an extension cord from the inverter to whatever device you want to power at the moment. A good compromise is to install a 30 amp receptacleon the outside of your RV and then connect it to the output of the RV  inverter. For reference you can see a video regarding a RV inverter install in a Keystone Cougar 276RLSWE Fifth wheel RV Trailer. GARY, this might be a dumb question, but how to do I take the output from the inverter into the 30 amp outlet, when the output of the inverter is 4 separate 110 volt plug outlets? I have question I don’t know if someone posted before or not but let this idea share with everybody.
1- I don’t know where to connect the wire in the RV panel coming from the inverter close to battery? 2-so what I have did is I plug the core which connect to generator to inverter when I want to use the power for RV from battery and when I want to generator I take it back and plug it to generator. When shore power connected, relay flips and AC outlets (and converter) are powered by shore.
When not attached to shore power, the AC will be powered by the inverter and DC by the battery. I recently installed 4xBT105 batteries for a significant bank in a custom rail slide frame. I get i will have all my receptacles powered by my batt bank (or when shore or gen if plugged in that way) – but how about coach 12v lighting of i’ve no converter to step down voltage to run those loads?
There is no standard color code for converters or any other 12v wiring, so you cannot assume your converter has the same wiring colors, or even the same number of wires as the one in the article you read. A converter has 120v input wiring, so that is likely the black and white (there IS a standard color code for 120v wiring). What are the differences between these types of power inverters: Modified Square Wave & Pure Sine Wave Inverters?
A power inverter is a product that converts DC (Direct Current) power into AC (Alternating Current) power.
An inverter takes the DC input and runs it into a pair (or more) of power switching transistors. Modified Square Wave: These are the most common generally used inverters available in the marketplace. Pure Sine Wave: Pure sine wave inverters are necessary for powering any device that requires sensitive calibration.
There is also a special line of power inverters that are called grid-tie, which do not usually use batteries - the solar panels or wind generator feed directly into the power inverter and the inverter output is tied to the grid power. Low frequency pure sine wave inverters are less common, but are still available from many excellent manufacturers. The size of the power inverter relates to the amount of power that it can deliver to the load that you want to use. The first step in selecting your power inverter is to calculate the total watts (Amps x AC Volts) of all appliances you plan to power. The next step is to establish what kind of loads you intend powering – now and in the future.
Electronic Load: Typically you will require a power inverter that can handle a minimum of 2 x amount of the continuous load as a starting peak surge. In order to determine the run time for any given amount of electronics, the general rule of thumb is to combine the amps from all the batteries you will be running in parallel. Acquire the amp numbers for each of the devices you intend to use and add them all together. If you are unable to determine the amperage on any given appliance then take the wattage and divide it by one hundred-twenty.
It is recommended that automotive batteries are only used for small power inverters, (<500 Watts). The efficiency of a power inverter relates to how well it converts the DC voltage into AC voltage. Because inverters operate from a DC (Direct Current) power source, usually a battery bank (two or more batteries), the battery source will have to be recharged at some point. Small inverters:Usually if you require less than 250 watts, the small inverters are available with male cigarette lighter plugs for use in the vehicle. If additional length is required, it is far better to increase the distance on the AC side - from the inverter to the appliance. A good rule of thumb, however, is that a 300 watt load plugged in to a power inverter needs approximately 30 amps from the battery. Two or more batteries can be connected in series or in parallel to increase the voltage and amperage respectively. If inverter is to be permanently mounted inside the vehicle (house or boat), it is very important that a line switch is installed to prevent damage to the inverter. More than 1 battery may be required depending on the number of devices being operated and for how long. When larger inverters over 800 watts are installed in vehicles, a major consideration is the charging system. What is necessary is to have an alternator that exceeds the maximum required by at least 20%. All COTEK brand pure sine wave inverters for North America (120VAC) are supplied with GFCI outlet connectors. Once your order has been placed it will ship within 24-48 hours, if the item is backordered we will contact you to see what you would prefer to do with your order. Our extensive line of every type of power inverters is backed by the best manufacturers in the industry. If there is a supplier near you, see if they will sell the short lengths that you need instead. But in any case, you need to ensure that you don’t have either shore power or generator power connected to the output of the inverter.


Whichever option you select, you can do the wiring with standard 14 AWG, household type nonmetallic cable. The problem with having both on at once, is that you are pulling current out of your batteries with the inverter, while pushing current back into them with the converter. The switch will automatically select shore power if it is available, and inverter power if it is not. You can either install new outlets or disconnect existing outlets from the distribution box. When you want inverter power, you just unplug the RV from shore power and plug it into the new 30 amp receptacle. Because the relay coil draws only a very small amount of current, you can use 18 AWG (lamp cord), or cut up a heavy duty outdoor extension cord if it needs physical protection.
There’s no air conditioner, microwave or anything else I can think of that consumes large amounts of power like that. So, plug in shore power (small generator to charge up batteries while boon docking, or powering up at home to charge batteries before our trip) I’ve got power.
I located the hot line feed to the converter and installed a separate circuit breaker for it. While the residential frig has its own Xantrex ProWatt 1000, it is totally dedicated to the frig. I’d like to wire my inverter with your option # 4 but an RV tech said that I still need the converter running to power DC items in the trailer such as most lights, furnace fan, water pump, etc. Your inverter will be running your microwave or whatnot, just leave the breaker for your converter off while the inverter is on. I am in the process of putting together a solar system on my 5th wheel for full-time rving. The converter converts the 120vac to 12dc and sends it to he battery(s) and also into the RV’s 12v wiring. There is no reason to tie those batteries to chassis ground, since the only thing they power is the inverter.
By rapidly turning these transistors on and off, and feeding opposite sides of a transformer, it makes the transformer think it is getting AC.
With a sufficiently large battery bank, or a large enough alternator output from a vehicle, virtually any AC product can be operated from a power inverter – provided that the power inverter has sufficient power output itself for the required load. They can be purchased at most large electronic retailers or stores with electronic departments.
Pure Sine Wave (also known as True Sine Wave) power inverters provide electrical power that is almost identical to the utility power you receive from the outlets in your home or office.
The power produced is either sold back to the power company or (more commonly) offsets a portion of the power used. The technology focuses on the use of a relatively large and heavy copper transformer that replaces much of the components required in the high frequency pure sine wave inverters. This power output rating (in VA or in watts) of the power inverter must be at least as much as the load or loads that you will be powering. All AC powered equipment will specify on a label the watts or amps of electricity required to power it. AC loads generally fall into two categories: Electronic loads, such as switching power supplies (or SMPS, as found in computers), and motors, such as the compressor in a refrigerator. Usually you will only be using one battery unless you wish to maintain a larger power base for more equipment or to extend run time. For most consumer power use applications, the automotive battery supplemented by the operating alternator supplying a continuous charge to the battery, will be sufficient. The cable size will depend on the distance from the battery and the amount of power required. Without this switch, 115 volts will try to enter the inverter as the inverter is trying to provide 115 volt output, (Assuming that the line is active). When the inverter is left ON, the advantage is that you have immediate backup AC power if you lose shore power. When the outlet senses a current difference between the hot (short plug) and the neutral (long plug), the unit trips – the button pops out. Connect this to the ground of the vehicle, either to the negative terminal of the inverter, the chassis of the vehicle or the battery ground. Your inverter should be located close to the batteries, but in a protected area free from moisture, dust, dirt and battery fumes.
Wire your converter to the shore power side of the transfer switch to ensure the inverter is not being used to charge the RV batteries. Transfer Switch (GP-TS) combined with a GPC Smart Battery Charger creates a totally hands-free system.
An RMA must be requested within 15 days of the original invoice date for non-defective product. It gets the job done, but we very soon got tired of plugging and unplugging different devices into the extension. The difficulty in accomplishing this type of installation will depend on where the outlets are located, and how hard it is to get wire to them. If you need a cable longer than the one that came with the switch, it may have too much resistance to work.
But as described above, it will end up creating that cycle of inverter charging the batteries via converter which is no good. Now when I pull my shore line up to the front of the trailer to connect to the inverter through a conversion plug, I FIRST turn the breaker off, so no power goes to the converter, but the AC portion of the unit stays on.
I am going to install a second ProWatt1000 (for redundancy) and they sell a nice automatic transfer switch for $60 or so. So what I believe I need is to stop the converter from trying to charge the batteries when the inverter is on.
I don’t plan on using the converter at all after I get my solar system set up, relying only on the battery bank.
One question though: wouldn’t it make more sense to put the relay to turn off the converter on the AC hot coming into the converter? If yours is different (it sounds like it is), you will have to figure it out from scratch or find a schematic for your converter. There are a couple ways to do that, so I’m not going to guess the purpose of your red and blue wires.
The gases and mist are likely to cause damage to sensitive electronic circuit boards, so it is best to keep anything electronic away from unsealed lead-acid batteries.
The AC output is usually 120 VAC, 60 Hz for North America or 230 VAC, 50 Hz internationally. This provides more reliability and does not produce electrical noise interference associated with the than Modified Sine Wave power inverters.
Although larger and heavier, these inverters are are typically more reliable and durable, since there are fewer components to fail over time. This is the most important decision when selecting the power inverter and it is always advisable to purchase a power inverter with higher capacity than your current needs. The continuous rating must be high enough to handle all the loads that may intend operating at the same time.
Both of these types of loads require different levels of the initial surge of power required to start them up, often called a peak surge for electronic loads. Future product will have the capability to be paralleled to provide up to 8000W of pure sine wave output. Divide the total number of amps calculated by twelve and keep that number on hand for further use.
This resultant number is the run time in hours for how long your equipment can run on that power inverter.


If you use the power inverter while the engine is off, you should start the engine regularly and let it run to charge the battery. Efficiency here can be broken down into two aspects - the efficiency of the power inverter and the efficiency of the waveform. If the load is large (air conditioner, large draw power tools, large microwave, food freezer, ice cream machine, etc.), it is important to ensure that the installed vehicle alternator has a large enough capacity to operate the vehicle's power requirement as well as to fulfill the capacity of the inverter load. The power inverter should be kept free from moisture as liquids conduct electricity, which could lead to serious damage or injury! In the example above, power inverters of 300 watts or 3000 watts can be used to supply a 300 watt load from the battery without any significant difference.
However, you may not be aware that shore power is lost until your batteries are fully discharged. The DC Install Kits listed on page 10 contain everything you need to install your inverter properly. Add a GPC-Smart Controller and take advantage of high powered three-stage smart charging capabilities. If you would prefer to ship on your own UPS or FedEx account, we can accommodate your request. For extended or full-time travelling, see our Overlander Solar Kit or an AC power system like the Solar Elite. The most common method for achieving this is to use a split distribution panel, with the converter on the part of the panel that is not connected to the inverter. If your longer cable doesn’t work, you will have to substitute a cable with heavier gauge wire.
Since the converter control center powers the 12vDC side, and all 120vAC outlets are coming out of the converter power center, I have to power the converter power center.
Plan to connect it to the 15 amp breaker that feeds all the non-GFI outlets (and the TVs.) I will put it right next to the Progressive Dynamics 70 amp converter and will just feed it off ht back of the 9270, which supports feed through connections.
Not sure if this one item can be disabled while leaving the rest of the converter functioning? This way, when you shut down the converter, everything 12v is still powered from the batteries directly.
If you would identify the make and model of your converter, perhaps someone with the same model could help you out. A power inverter can also be used to power air compressors, water pumps, heaters, ventilation fans, and air conditioners provided the power inverter is sized to accept the high inrush currents. It is critical to remember that the load will require more power at start-up compared to the continuous operation. The inverter must also be capable of handling the starting surge of all loads that may start at the same time. The peak surge is almost always considerably higher than the continuous load (which is the power needed to run the load after initial start up) and must be considered when sizing the inverter, the battery, and the cables that connect the two. Waveform efficiency means that most motors and many electronic appliances run better and use less power with a sine wave.
If it’s not, a larger alternator or a larger alternator + battery isolator + additional onboard battery bank may be required in order to meet the power requirement of the large load. If you increase this distance over approximately 10 feet, you will need to use larger DC cables to compensate for a drop in voltage and DC ripple. However, deep cycle batteries are able to be drained to a 50% charged state because they are capable of withstanding repeated drains of power and recharging. If you choose to leave your inverter OFF you have the advantage of knowing when you have lost shore power. All items must be returned in "as new" condition in the original packaging and have all accessories, blank warranty cards and owners manuals.
If that seems like a more complex RV inverter install than you want to try, read on for how to use a relay.
I got up in a hurry when the low battery alarm on the smoke detector started beeping at me. If the 9270 can pump 70 amps to the batteries, the wiring should handle the 1000 watt DC load reasonably well.
Otherwise, you are still sending AC to the converter, albeit no load is taken from the converter. DC is usable for some small appliances, lights, and pumps and is usually suitable for small home or cabin systems, RV's and boats.
Sensitive equipment such as laser printers, monitors, can also be powered by a power inverter, however, in these applications a specific type of power inverter needs to be used – a Pure Sine Wave inverter. Although designed emulate a Pure Sine Wave output, Modified Sine Wave inverters do not offer the same perfect electrical output. Usually, an electric motor (such as a pump or refrigerator) will use 15% to 20% more power with a Modified Sine Wave inverter than with a Pure Sine Wave inverter. I’ve rigged a portable tankless water heater that feeds the trailer hot water, and a Camco catalytic heater and both use no power. And isolating one or two outlets for JUST the inverter isn’t what I want to do either. Or if the inverter is left on by accident the only thing that happens is the inverter slowly discharges the batteries. They will never work at the same time since there is a transfer switch and the converter has its own breaker. Sensitive equipment in commercial and industrial applications commonly use power inverters such as communications equipment, oscilloscopes, scales, high end stereos & video equipment, test equipment, etc. Consequently, the Modified Sine Wave power inverters have the negative by-product of electrical noise in the output, which can prevent these power inverters from properly powering certain loads. Consequently, if you are selecting an inverter based on efficiency, consider the type of load you are going to be running. Now, when the inverter is turned on or off, the relay automatically switches the converter off or on. The 12vDC system has the water pump, 5 LED dome lights, 2 exterior LED flood lights for the ramp area, a radio and the bathroom fan.
Basically, I want the inverter to power the converter control center, but NOT for it to charge the batteries.
So flipping the inverter on gives power to outlets or, turning on generator powers outlets AND charges batteries back up. Although some DC appliances are available, with the exception of lights there is not a wide selection. For example, many TVs and stereos use power supplies incapable of eliminating common mode noise.
I’ll also be installing a 100 watt solar panel, and will expanding to around 400 watts in the future to lesson the need of running the generator as often.
The only thing I could find, and I think I’m on the right path with, is getting the Go Power!
Similarly, most appliances with timing devices, light dimmers, battery chargers, and variable speed devices may not work well, or indeed, may not work at all.
The most common battery voltage inputs for power inverters are 12, 24, and 48 volts DC - a few models from some companies are also available in other voltages.



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