Confusing battery levels (readings)

[Mrcoolabah1au]

Did you get your research done and what did you find out

[Dot]

Been out of range Wayne but will get into it when we get home.

[Chuck]

Yeah, yeah, yeah... but what about the research.

[Dot]

Yeah, yeah, yeah... but what about the research.

Research the Sucking on a kumera, that will keep you occupied. I am trying to make something/anything out of the booklet the info gave us about the fruit fly zones around here G is still down the street shopping guess we eat cake tonight if I know him.

[Mrcoolabah1au]

Fruit cake like fruity machine ( apple)

[supersparky]

Dot, Just down the road from where you are, on the way to Kyalite is the fruit fly collection bin. The signs there identify what you can or cannot carry past there. From memory we sat there around Easter time and ate all the bananas and apples and binned the rest. I think it is a rather hefty fine if you get caught trying sneak stuff through.

[T1 Terry]

Did you get your research done and what did you find out

Apples are seedy, worms in the core and once you look beneath the skin all the flash and colour is gone

[Dot]

G has been doing his calculations for the battery draw in the bus for your perusal.
Lights (interior)............ 4amps pr day @ 4 hrs usage
TV............................ between 7 - 10 amps approx. 3 hrs pr day
Bushman fridge/freezer...15 - 20amps at - 10 deg
PC (when in use)'......... 4 amps 3-4 hrs pr day
Inverter ?? had no real usage for the inverter but do switch it off when not required.
Solar IN varies from a sunny summer day of 140amps daily down to a cloudy day to about 30 amps.
The battery capacity is rated at 540ah.


G also picked up the two new batteries today. 2 x 270ah... B4 you start on "why didn't you go Lith"? well we would have IF we had time to set it up because we know nothing of how what to do to even start.

[T1 Terry]

G has been doing his calculations for the battery draw in the bus for your perusal.
Lights (interior)............ 4amps pr day @ 4 hrs usage
TV............................ between 7 - 10 amps approx. 3 hrs pr day
Bushman fridge/freezer...15 - 20amps at - 10 deg
PC (when in use)'......... 4 amps 3-4 hrs pr day
Inverter ?? had no real usage for the inverter but do switch it off when not required.
Solar IN varies from a sunny summer day of 140amps daily down to a cloudy day to about 30 amps.
The battery capacity is rated at 540ah.


G also picked up the two new batteries today. 2 x 270ah... B4 you start on "why didn't you go Lith"? well we would have IF we had time to set it up because we know nothing of how what to do to even start.

4 amps per day, oldtrack would be having a coronary if he reads this
I'm guessing this is 4 amps instantaneous so if used for 1 hr constant it would consume 4 Ah, x 4 hrs = 16Ah per 24hrs
TV 10Ah x 3 hrs = 30Ah
Bushman... this one is tricky, it may use 20 amps when it is running, but it doesn't run at that load constantly, so the duty cycle will tell us how long it is on compared to off. A wild guess, 60% duty cycle = 14.4hrs x 20 amps = 228Ah... that is a lot, so the duty cycle is required. A 200ltr fridge freezer uses 80Ah to 100Ah @ 12v per 24hrs, so if we use that figure, 100Ah
PC 16Ah

16Ah + 30Ah + 100Ah = 16Ah = 162Ah. 2 x 270Ah of AGM will give 270Ah at a C20 draw down rate to the 50% SOC where AGM batteries are safe to discharge.
Now it gets even more tricky, if you want to get the 270Ah you can not take out more than a C20 rate, in this case 540 divided by 20 = 27 amps, your draw looks to be around 38 amps, so you may only get 200Ah and not the 270Ah you are expecting.
All thing added together, you have 38Ah left after 24 hrs with no solar like an over cast or rainy day, then you will need to run the generator for a min 12hrs to return the battery to more than 95% SOC, or plug into mains power. At best you will recover 140Ah, but more likely 120Ah at best as the battery will not accept the full charging rate after around 70% to 80% SOC, then the amps taper off to control over voltage damaging the battery, and you are still short 42Ah each day.
You need more/better battery capacity and more solar if you want to use that much power... and you mentioned an inverter as well.......what can I say....

[dapope]

Um.... Dot, theres enuff onhere would have helped you out with the lithium..start saving the shekels now, buy the batteries and then wont take long after that☺