Air conditioning

[Mrcoolabah1au]

Ok what else do we need to run the air for a couple of hours already installed
3000 watt inverter
600 wattt solar
300 ah lithium
Pl20 plus shunt fuses and relays
Junsi opperator bms

[native pepper]

There's always this way to go, which means you don't have to use your own power and never have to worry about heating and cooling, as their systems are reverse cycle, so you can use them to warm the bus/home in winter and they offer hybrid systems you can run on solar during the day and battery power at night. Pretty neat setup and one which will save lots of money in the long run, as well as not effecting your lifepo4 power system.

https://solaracdc.com.au

"We are the only suppliers of Air Conditioners that can operate just from solar panel power without grid power or batteries! Made for Australian conditions and Australian standard."

[T1 Terry]

There's always this way to go, which means you don't have to use your own power and never have to worry about heating and cooling, as their systems are reverse cycle, so you can use them to warm the bus/home in winter and they offer hybrid systems you can run on solar during the day and battery power at night. Pretty neat setup and one which will save lots of money in the long run, as well as not effecting your lifepo4 power system.

https://solaracdc.com.au

"We are the only suppliers of Air Conditioners that can operate just from solar panel power without grid power or batteries! Made for Australian conditions and Australian standard."

I reckon this is the mob that contacted us late last yr to find out how we made RV air con run from batteries and solar
You can't power an air con from solar unless you have more solar than the maximum load demand ..... and what about when the clouds drift over the the sun for a few mins?
Wayne, as long as the inverter is pure sinewave, nothing else required. Just watch the Victron BMV so you know when you need to turn the air con off so you still have enough battery to get through the night ... but that's about it. We fit a lot of system for people who what to do exactly what you are suggesting and discover they can get a lot more than a few hrs air con running as long as the sun is shining. The Swagman we are doing at the moment just had 2 new rooftop rattlers installed, the inverter type, and we are installing solar, batteries and inverters to run them as well as all the other 240vac stuff they have. We did their brand new 5 bedroom "holiday house" a few yrs back and discovered what we told them about "swampy" air coolers was correct, they use a lot more power than a modern inverter air conditioner does ... so they had a split system installed in the "holiday house" and it works so well they decided that was the way to go with the Swagman ....
This house is a long way from the grid so it had to be 100% offgrid, just like an RV really, but no option to plug in an extension cord

T1 Terry

[Mrcoolabah1au]

Ok have tested it ran for an hour never got real cold but some was every 10 or fifteen minutes the victron would drop voltage for two or three minutes then pick up again amp were all over the place but it never cut out completely maybe tomorrow or Friday we supposed to get 40 deg so may try it then good thing no bell or whistle going off

[T1 Terry]

Try running the air conditioner from the mains power, does it cool better on mains power than on inverter power? Some times the inverter does not have the over load capacity to start the compressor on the older rooftop rattlers, so they just run as a fan and no compressor so no real cooling. What temperature did you have the thermostat set to? What was the temp inside the bus?

T1 Terry

[native pepper]

"I reckon this is the mob that contacted us late last yr to find out how we made RV air con run from batteries and solar
You can't power an air con from solar unless you have more solar than the maximum load demand ..... and what about when the clouds drift over the the sun for a few mins?"

Terry, if you'd read the article, they run from solar and battery. When the sun is shining, they run on solar when the sun is not, they run on batteries, or the grid.

https://solaracdc.com.au/wp-content/upl ... -Fixed.pdf

With the rapid development of lifepo4 things are looking up as this article shows for Ev's and off grid. In my humble opinion it will only be a couple more years when energy storage technology provides the ability to simply switch your RV from fossil fuels, to battery. Add some super capacitors, some more solar panels and you are as free as a bird.

https://www.dailymail.co.uk/sciencetech ... xiety.html

[T1 Terry]

The 2 way battery connection for EV's will be released main stream this yr. Some of the more exotic European models already have it now. A small battery bank for the house and the 40 kWh the EV can store, just pump the solar into your batteries and forget the grid. They are paying so little for input to the grid, yet charging a lot more to get it back later on when you need it, so storing it in the EV for over night use makes sense and cents ... well $$ really. Then you get to skip the charge for having the power connected from the grid to your house, even if you don't use the power available, and the pay back period becomes very short. Then consider the fact you can buy second hand panels from Gumtree and evilbay for bugger all because they can't be used on a grid connect installation, but they can't say a word about you using them om an off grid install, and you are way ahead of the game. No more fuel costs and serving cost is minuscule, not long before you have saved enough for the second EV and forget about fuel prices for ever.

T1 Terry