Lead Crystal Batteries?

[10G]

I’m serious. Years ago camping on Fraser Island in summer with 4 young kids so hot as and raining.
My fridge battery went flat, the solar panels wouldn’t work so I grabbed my charger and inverter and tried to charge my flat battery
In my mind it was charging itself. Well it didn’t work. The charger wouldn’t switch on


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Sort of like plugging an extension cord into itself.

So if my NoCo charger says it's max power consumption is 60W, that'd be 60W when plugged into 240V so therefore it's pulling 0.25 amps which doesn't seem like much. So if I have a 300W inverter, that's 300W at 240V so it gives out 1.25amps so should be able to run the charger.

Does that sound correct or have I screwed up my maths???

[the evil twin]

Ignore the math and amps etc... it is simpler than that.

A 300 watt Inverter will supply up to a 300 watt load and you have a 60 watt Charger (load) so all is good.

Check the specs tho as el cheapo Inverter manufacturers will market as 300 Watt but in the fine print it may well say 300 peak and 240 watt continuous.

Still no worries but just pays to be aware.

[10G]

Thanks everyone for the help, I started off thinking I'd have to spend squilions and spend hours fitting new bits n pieces, but I've ended up only needing a small AGM battery, everything else I already have.

Thanks once again.

[Clunk]

Thanks everyone for the help, I started off thinking I'd have to spend squilions and spend hours fitting new bits n pieces, but I've ended up only needing a small AGM battery, everything else I already have.

Thanks once again.

So just going run off your inverter then?

[Avo]

So just going run off your inverter then?

Nah he hited a mouse n one of them spinny wheels

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[10G]

So just going run off your inverter then?

Yeah that's the theory, however I think the theory has a hole in it. I'm pretty sure what I have in place currently won't have the grunt to recharge my aux battery from the night befores work. So I'll be trying to charge a battery (the 35AH one) off a semi flat (the 100AH one) battery, which I don't think I'll get any joy doing.

So I'm back to looking at a better charge system and a better aux battery.

I may use solar, but I have a 2nd spare, two swags and sometimes some jerries on the roof, so I don't have the space. I can use a solar blanket, but not when I'm driving.

[Clunk]

Yeah bit no one cares if you stop breathing

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Nah he hited a mouse n one of them spinny wheels

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Ohhhhhh you're such a funny twat

[Avo]

Ohhhhhh you're such a funny twat

Learnt from the best

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[10G]

I'm back looking at lithium and a new charger as I honestly don't believe I'll be able to recharge a small AGM via an inverter off a 'drained from the night before' wet cell battery. I reckon the wet cell will be too flat and need to be recharged significantly before it will be able to run the inverter and charge the cpap battery. And by the time that happens we'll probably be stopped for the day.

I've worked out my worst case load excluding lighting and it comes to 74AH. That's made up of 2 fridges running for 16 hours and a cpap m/c for 8 hours. We won't always have 2 fridges so when we have 1 it comes down to 54AH which a 100AH lithium should have no trouble with.

I've found a place within the cabin to put a battery and charger. I came across a Victron data sheet in which it lists the expected life of one of their AGM batteries in different temps and heat destroys them. They expect 7-10 years when housed in 20 celsius, then only 4 at 30C then only 2 at 40C so under a bonnet must destroy them pretty quickly.

[Yeti's Beast]

Stop snoring and your problem is solved lol
If your ever near Roweville , pop into MPower and have a chat to them.
I work for them in Qld


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