Saturday, 25 March 2023

It started Raining

Work on the battery modifications ceased when it started raining.  Autumn must be here!

The new lithium battery had been on charge for three hours when I went to check it.  The 15A charger was resting.

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This was a good sign as it indicated the lithium battery BMS had stopped the charger from over-charging the battery.  I then checked the amp meter which had been displaying 15 Amps going into the battery.  Now it was displaying 0.2A.  Another good sign.

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The last check was the battery voltage meter.

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When the battery is 100% whilst charging the voltage should be 14.6V

A 'rested' 100% charged battery should have a reading of 13.6V

If the meter is accurate then the voltage should slowly drop to 13.6V as the battery 'rests'.

The old battery was underneath the trailer whilst the new battery will be in the top compartment.  I'll need to extend the cables.  The cheapest price I could find for 2 metres of suitably sized red and black cables was $45.  Then I remembered seeing a set of 3.5 metre long 100A jumper cables at a special price of $39.95 in the 4WD Supacentre.  Better the $5 in my pocket.

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I made a short lead for the battery terminals with a Anderson Plug at the other end.

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The small black wire is the temperature sensor lead.

I could plug the supply positive and negative wire into one of the Anderson Plugs on top of the battery box rather than making a lead that fits to the terminals.  My reasoning for not using one of the top plugs is both top plugs could be used in the 4WD.  One to power the fridge and the other for the 12V oven.

No photos of the trailer wiring as it's still raining.

Friday, 24 March 2023

Decision Made

Whilst driving home from my recent camper trailer snagging trip I considered the battery replacement issue.  The 'dead' 150Ah slim line AGM battery had been carefully mounted by me in a secure and sealed custom made case under the rear of the trailer.  The first two consideration were; should I replace it with another slimline AGM battery or opt for a slimline Lithium battery?

My electrical demand is rather modest.  The combined load for the fridge and freezer is less than 6 Amps.  Added to that is a small amount of LED lighting and the very infrequent use of the 500W 240V inverter.

When not moving, the single 150W solar panel provides sufficient energy to meet the requirements to power the fridge and freezer.   Assuming the panel can produce a max of 10 Amps and there are 15 hours of daylight then the production would be 150Ah.  This is probably optimistic.  Assuming the fridge/freezer consumes 6 Amps for 24 hours then the load is 144Ah.  Of course the fridge and freezer don't run continuously so the consumption will be less.  Assume the consumption is 100Ah. 

It's only possible to use 50% of an AGM battery before damaging it.  This means the old battery had 75Ah available.  This is insufficient if I was to rely on the solar panel.

Lithium batteries can provide 80% of their rated capacity.  Well they can provide 100%, but this significantly reduces the number of life cycles.  It stick with 80%.  Therefore, for the 24hr load of 100Ah a replacement Lithium battery would require a minimum capacity of 125Ah.

The price of Lithium batteries is slowly reducing.  A good quality 100Ah lithium battery costs approximately $1500 and the budget end around $4-500.  You get what you play for and if it was essential for me to have a very reliable battery system (ie, continuous cruiser) I'd opt for a more expensive quality battery.  However the camper trailer doesn't fall into that category and a budget battery should suffice.

There are three essential criteria with lithium battery construction

  • Quality of the assembly/construction
  • Quality of the lithium cells (some manufacturers use second hand or second quality cells
  • Quality of the inbuilt Battery Management System (BMS).  A poor BMS can result in cell imbalance leading to premature battery failure.

I'm not going void a warranty by tearing apart a newly purchased lithium battery to inspect the quality of construction.  Instead I will read the results of others who have done this already.

An initial search revealed Aldi has a 'VoltX' brand lithium 100Ah battery on sale this weekend for $449.  Purchasing an Aldi 'Special Buy' in Perth is very "hit and miss".  We're on the other side of the continent and often the special Buys aren't in stock.

Another option was a battery from iTechWorld.  They are a local, Perth company who design and develop lithium batteries.  Note they don't state 'manufacture'.  No doubt their batteries are made in China.

I've previously purchase a number of camping items from the 4WD Supacentre chain of stores.  they specialize in budget priced 4WD and camping equipment made in China.  Their website stated they had a current special on many items; including lithium batteries.

I could purchase a slimline lithium battery from the 4WD Supacentre and fit it into the old AGM battery compartment under the trailer.  That's when I realised it wasn't necessary to fit the replacement battery under the trailer.  If I purchased a lithium battery it would be lighter than the old AGM which would enable me to more easily move it around.  When I was going on a trip without the trailer I could place the battery in the rear of the 4WD, along with the fridge.  I'd need to make a battery box, but that wouldn't be too hard.  Then I realised the 4WD SupaCentre had a special on battery boxes.  They were selling them cheaper than I could purchase the components.

Off to the local 4WD SupaCentre

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Our new 120Ah lithium battery

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The battery box

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Internal 30A fuse. 

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Isolation switch, voltage meter and red 10A reset button.

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On the opposite side is a 12V cigarette socket and two usb charging ports

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On the top are two Anderson Plugs

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I fitted the battery inside the case noticing there was a gap on the side and end.  The last thing I want is the battery bouncing around inside the box and I fitted some packing to eliminate that from occurring.

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Then the cables were connected to the battery terminals and the lid fitted.

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The voltage meter was showing 13.2V which indicated the battery was approximately 70% charged.

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Accordingly to the battery specifications the maximum charging current is 60 Amps.  But the fuse in the box is rated at 30 Amps.  I elected to be cautious and used our 240V charger which has a maximum output of 15 Amps.

Whilst the battery was on charge I made a start on modifications to the trailer .

Thursday, 23 March 2023

"Snagging Trip"

Those reader who have had a narrowboat built will likely know that at the end of the construction process it is usual to take a "snagging cruise".  This is when you find all the small issue that need rectifying by the builder before the boat can be consider completed.

After my recent alterations and additions to the camper trailer I decided to make a "snagging trip" to see if everything was satisfactory.  I also wanted to test the new 12V oven.  The trip proved to be a sound decision as I identified two important issues requiring rectification. 

My journey took me 200km south of Perth to the Collie Region.  I'd not previously visited the area and the snagging trip was a good opportunity to familiarize myself.

Rather than taking the southern Freeway (motorway) I opted to use the older Southwest Highway as it would provide a change in scenery.

After driving 30 minutes I stopped and turned on the new 12V oven before continuing on for another 30 minutes.  This time I placed three frozen sausage rolls into the now pre-heated over.  Jan had suggested I place the rolls in an aluminium tray instead of directly on the oven rack.  The idea was this would minimise crumbs.

After another 30 minutes I stopped for lunch at Waroona where I had piping hot rolls.   So hot that I needed my hat to get the tray out of the oven.

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Online oven reviews had suggested it would take an hour to heat pies and rolls.  However our oven does this in 30 minutes.  My belief is this is a result of the voltage step-up converter raising the voltage to 15V.

The oven is working well, although I discovered using an aluminium tray wasn't a good idea as the radiant heat had burned the bottoms of the rolls.

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Waroona is a quiet and tidy country town.

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Half an hour later I reached the town of Harvey.  This is another pleasant country town.

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Art Deco architecture?

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Parked in the main street

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My plan was to reach Wellington Dam and camp in Wellington National Park.  Entry to the park is free but camping fees apply.  Upon reaching the road into the park I noticed a sign stating there was no mobile phone coverage in the park and camping booking had to be made online.  That was annoying as I had anticipated the park would be like others I'd previously been to where there was a pay kiosk. 

Upon attempting to book online I discovered the National Parks booking website was overloaded with a message stating "try later".  That was no good to me as there was no mobile phone coverage further on.  In the end I decided to drive on and visit the dam.  The camping issue would be solved later.

Wellington Dam was constructed during the Great Depression.  It was one of the government public works projects designed to meet a need but also provide employment and an income for those who had lost their livelihood.  The dam and reservoir are named after the Duke of Wellington.

The original dam has been raised in height twice since first constructed.  Initially it's purpose was to provide water for local irrigation.  However as it was raised in height and capacity increased it also provide town water supplies in the region.

Whilst the reservoir has been a well know and used recreational area for locals, it was the painting of the mural on the dam that made it a major attraction.  The 8000sq mtr mural by Australian painter Guido Van Helten was completed in 2021.

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The northern half of the reservoir is in the National Park and the southern half in the State Forest.  As I was unable to pay of a campsite in the National Park I decided to do some "free" camping on the southern edge of the reservoir in the State Forest.  No facilities in the forest; but that didn't bother me. 

A 6km heavily corrugated dirt track led me through the forest to the water where I found an isolated campsite.

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I'm not the first to camp here as I found an old shelter and discarded broken folding chair.

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I immediately realised someone old; like me; with dodgy knees could make use of the broken chair.  Cutting a hole with my pocket knife and positioning the chair over a hole provided me with a "short drop" toilet.  

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Necessity is the mother of invention Smile

Initially I thought I was alone.

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However an evening walk revealed there were others in the far distance who had a similar idea.

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Dinner consisted of sausages, potatoes and mixed veg.  I retired to the rooftop tent at dusk and had a fitful night as it was hot and humid.  Too hot to sleep in the sleeping bag and too cold to sleep without it.

In the morning I woke to find my first major snagging issue.  The trailer battery was flat!  This wasn't exactly a surprise as I've had my suspicions about the AGM battery.  It hasn't been used much but is now at least five years old.  Last night I removed the contents of the freezer adding them to the fridge.  After turning off the freezer the electrical load was only 2.4A.  The battery had been fully charged before leaving Perth and the charge maintained by the vehicle during the trip.  Then the solar panel supplied it until dusk.  It should have been able to easily cope with the overnight load.

I need a new battery! Sad smile

There was little point in spending more nights away from home as the food in the fridge would likely start to go off.  After packing up I did my normal routine of checking the trailer lights.  That's when I discovered the left indicator light on the trailer had an intermittent connection.  Another issue identified!  A temporary repair fixed that and I started heading home via the town of Collie.

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Collie is mainly known for its coal containing the only coalfields in West Australia.   At one time there were four thermal power stations and two coalmines around Collie.   However the move towards "green energy" has seen all but one of the power stations be decommissioned, with the last to be decommissioned in the near future. 

Friday, 17 March 2023

Camper Trailer Enhancements

A number of items ordered from China arrived today.  All of them are required for some enhancements I have planned for the camper trailer.

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Clockwise from the top left in the above photo.

  • Mounting bracket for an Anderson Plug
  • 12V to 15V DC converter
  • 10 Anderson Plugs
  • A Watt Meter.

These are required for three projects.  The first is to increase the voltage to the 12V oven in the back of the 4WD.  When running, the oven draws 15 Amps at 12V.  By increasing the voltage to 15V the heater element should get hotter.  The converter is rated at 30 Amps which should be sufficient to power the oven.

I've mounted the converter on the rear of the oven cabinet    

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The second project was to mount an Anderson Plug on either end of the Watt Meter.  This provides a handy meter to monitor the various power sources and consumers.

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The Watt Meter was plugged into the 4WD power supply to the oven with both the engine and oven off.

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No current (Amps) and the voltage was 12.53V.  That slightly concerned me as I'd only taken the battery off the 240V battery charger that same morning. 

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Then I started the 4WD with the oven still off.  The voltage rose to 13.63V and there was a very slight Amperage.  Probably due to power losses in the 12-15V converter.

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Then the oven was turned on.  The voltage dropped to 12.39V and the Amperage was 15.86A.  I'll get around to testing the voltage on the oven side of the converter.  It should be 15V

The third project is to fit a 12V Anderson outlet plug on the trailer.  I've decided to fit one in order to run the oven in the back of the 4WD from the trailer battery when camped.  This avoids the potential of inadvertently flattening the 4WD battery.  It also means the solar panel can be recharging the trailer battery whilst the oven is simultaneously drawing power from it.

The first step in this project has been to wire an Anderson plug into the trailer.  I've sealed the back of the plug with silicon as it will be slightly exposed to the elements. 

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The last part of this project is to fit a mounting bracket to the trailer.

Wednesday, 8 March 2023

You learn something new every day!

This was a revelation to me!  Jan  has been experimenting with the 14 different cooking functions of "The Beast",  Yesterday she cooked a beef roast in "The Beast" using the dehydration mode.  My assumption was the finished product would look like dried leather.  Perhaps beef jerky!  It was quite a surprise to discover the cooked roast was pink in the middle, juicy and tender.

roast beef

Then she roasted the potatoes and carrots in "The Beast" using the steam function.  They were lovely and crisp.   

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The results seem to defy logic?

This morning I went for a 74km bike ride.  I've been wondering why when riding north on the cycle path beside the Tonkin Freeway (motorway) I get overtaken by the "boy racers".  But then never see them on their way back.  I'm riding 'there and back' whilst they must be doing a circuit.  But where?

Last time I cycled to the northern end of Lake Joondalup I noticed a sign pointing east to the Tonkin Freeway.  That's when I realised this might be the northern leg of their circuit.  Today I decided to cycle that circuit.

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I've previously ridden the red portion of the above route.   Today I included the blue portion.  I won't be doing it again!  The road isn't cycling friendly and is used by a large number of heavy trucks.  Moreover the road surface isn't smooth.  Good luck to the boy racers.  I'll stick to the cycleways!  

Tuesday, 7 March 2023

Chinese Embassy Calling!

Over the last 10 days my phone has regularly rung and when answered I hear "Chinese Embassy" followed by several minutes of Chinese.  As I don't speak Chinese I was rather curious about the calls.  You will have probably already guessed; it's a scam targeting overseas Chinese!  Apparently the scammers have identified particular postal zones containing a higher than average Chinese population.  The purposes of the call is to frighten the Chinese speaking recipient with a threat of immediate punishment over some offence committed by them (or a relative) in China.  They must pay the fine immediately to avoid dire consequences.  I thought I might be able to block the number but it's different each time.

This next one isn't a scam, but anyone taking it up should be aware of the pitfalls.

West Australia is desperately short of workers; including the public service.  Police, nurses and teachers are required.  The Minister of Police is currently in the UK on a recruitment campaign and is apparently generating local considerable interest.  Photos of endless barmy summer days, large bungalows with twin garages and home swimming pools, sun kissed beaches, wide open spaces, etc.  Higher wages and an idyllic lifestyle.  What the minister isn't telling potential applicants is:

  • 7% of sworn police officers resigned last year and a further 1% retired.  There are reasons for an abnormally high attrition rate.
  • Salaries might be higher.  But so is the cost of living.   
  • The current housing market is extremely tight.
  • People with a trade in the construction sector can make good money….. If they can find somewhere to live!

Anyone overseas who is thinking of emigrating to West Australia in the current economic environment needs to do their research. 

And for something more interesting.  I have completed the lean-to over the pool equipment behind the workshop.

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Brian, my laptop came with Windows 10 pre-installed.  I copied over it with my existing Windows 8.1 because I didn't want to reinstall all my other software.  As the laptop hardware is capable of running Window 11 I don't need to "slim it down".  However it's handy to know it can be done!

Dave, that worked and the small Windows icon is now hidden behind my old 'Start' button.  Thanks for the tip.

Wednesday, 1 March 2023

Short Arms

Grunting, groaning and cursing appears to be very helpful when attempting to work in a confined space.  This all occurred after Jan expressed disappointment with the sink mixing valve in her "new" kitchen.  Well, to be honest the kitchen was installed 4½ years ago.  The spout of the expensive stainless steel mixing valve had rusted.  It's her second mixing valve after the same problem occurred with the original and which was replaced under warranty.  This time the distributor refused to replace the mixer claiming it had been damaged by using incorrect cleaner.  Jan only wipes it down with a wet cloth and being accused of damaging the mixer didn't go down well. 

Time to replace it with something different.

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The original

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with a rusty spout

The original mixer had three outlets.  Hot, cold and filtered cold water.  The filtered water went through a filter fitted in the cupboard under the sink.  Everything is made to a price and this filter is "one piece".  It hasn't leaked but does look expensive to replace.

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Jan had identified a plumbing showroom in the nearby industrial park and we went there for her to select a replacement mixer.  Next I visited a separate plumbing distributor where I purchased a heavy duty filter unit and a carbon cartridge.  The idea is this new filter housing may have cost more than the original but the cartridges are significantly cheaper.  As it's the cartridges that get replaced this approach should be cheaper in the long term.

You can see the capped off original filter line (red arrow below) in the photo below.  I then plumbed in the new filter and mixer.  I've not mounted the filter as I want to check for leaks first. 

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I'm pleased I did that as one of the connection decided to weep resulting in me having to remove the filter and re-install the weeping brass fitting.

Installing the new mixer proved to be quite a challenge.  It's secured from underneath in a recess behind the sink out of sight and almost out of reach.  I had to do everything by touch stretching my arm.  Grunting and groaning helped.  Do plumber have long arms?  

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This mixer only has hot and cold, but all the cold water passes through the new heavy duty filter.

Another job done.

This is a screen shot of my Windows 11 desktop.  As you can see I'm managed to make it look like my original Windows Vista desktop.  Apart from the Windows icon on the Taskbar, which I haven't been able to remove (red arrow) 

screen I've realised Windows 11 loads faster than windows 8.1.  Perhaps Windows 11 makes better use of the laptop hardware?