Archives for April 2015
Hayman Reese has just released the 7 tonne 5th wheel hitch to suit larger 5th wheelers towed by GMC, F250, F350, Iveco type vehicles. RV Service Centre is your local authorised installer for Hayman Reese 5th wheel and gooseneck fittings in the Toowoomba region.
Rated for 5th wheel trailers with an ATM of 7,000 kg.
Legal in all states and territories in Australia.
We carry out an engineer certified installation.
A quick and easy method for determining the amount of charge left in your caravan batteries is to look at the voltage. This can be via a handheld voltmeter, or multimeter, or a built in volt meter.
|State of Charge||Sealed or Flooded Lead Acid||Gel battery||AGM battery|
Check out this baby! A fully integrated slide-out kitchen to suit your Webber Baby Q. Can be retrofitted to most caravans and camper trailers.
Sick of paying Winnebago prices? We have replacement Winnebago doors available, which suit Winnebagos and most American 5th wheelers.
Upgrade the entry door on your Winnebago motorhome or American 5th wheeler to a fully secure, stainless steel security mesh Roamsafe door. This door replaces the flyscreen section of the original door and comes with its own handle and locking system.
Microwaves normally have an “ouput power” rating like 500-1000W (watts). Many people incorrectly assume that this is the power that the appliance consumes. Typically, microwave will draw 40% more. This gets worse when running off an inverter due to their poor power factor.
E.g. an 800W rated microwave, consumes about 1600W of 12v power through an inverter – ie DOUBLE!
When calculating inverter size and battery requirements, use a factor of 2x the “rated” wattage of your microwave!
Hair Dryers: 1200-2000W
Electric blankets: 120W
Bar Heater: 400 – 1200W
Using any of the above appliances puts a heavy draw on your caravans electrical system. You can run these appliances through an inverter while on battery power, to give you 240V mains power, however, you need to limit their use to mere minutes a day.
Consider a diesel or gas space heater instead of a bar heater. You can also get 12V hair dryers which can do a decent job.
CPAP machines (Constant Pressure Air Pump) are quite common with many of our customers, needing to be used during sleep and/or during the day.
These are generally a 240V device designed for use from domestic mains power. In a caravan, you need to run them through an inverter – which is a device that takes 12v battery power, and produces 240V main power. In selecting an inverter, you need to ensure you get the correct size unit.
In general, a CPAP machine will consume about 5-6 Amps at 12V while running. If you run this for 8 hours, this is approx 48Ah of power, and equates to the usable capacity of a single “normal” caravan battery. (ie a 100Ah deep cycle caravan battery can provide up to 50Ah of power before needing to be recharged).
Therefore, if you have just one battery, you would need to be able charge it each day with solar being the most common option when away from powered sites. You would need a minimum of a 150W panel, and approx 5.5 hours of sunlight per day. Of course, 2 batteries and 2x 150W solar panels would be a better option.
There are also 12V versions of CPAP machines available, and consume approx 1.5-2.5A of power – which is considerably less and reduces load on your 12V system compared with the inverter version.
Inverter Recommendations for CPAP machines
- Use a “Pure Sine Wave” inverter.
- Look at “Wattage” or “Amperage” rating of your 240V CPAP machine. Most consume around 0.3A at 240V which is approx 72W (A x V = W)
- Get an inverter larger than this Wattage. E.g. minimum size for above would be 100W inverter.
- A good common size inverter for use in a caravan in 300W Pure Sine Wave, and would allow you to run other devices like a laptop too.