Deep Cycle or High Cycle with Solar - Page 2





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  1. #21
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by Eggie View Post
    Now if you were to get a second 100W panel... you could just about kiss all your worries goodbye.
    Well, his 100W is actually 2 x 50W panels. So from size and weight point of view just another 50W would give him a nice safety factor.
    Cheers

    ZS5KAD
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  2. #22
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    Default Re: Deep Cycle or High Cycle with Solar

    In my Navara:

    2 x 105ah Royal deep cycles
    1 x 160w Omnipower solar panel (Fixed to the roof)
    1 x dc-dc Ctek charger
    1 x Stecca solar controller
    I have separated the charging systems for solar and dc-dc

    This setup has to run
    1 x 600w inverter at night
    1 x 78L Arb fridge
    LED lights used at night
    1 x Water pump

    Battery's usually at 80% in the morning. If not driving by 12pm battery shows 100%, if driving allot sooner.



    In my trailer:

    2 x 100ah Lead crystals
    2 x 80w Solar panel ( mounted to the roof but removable)
    1 x HCDP Charge controlling system

    This setup has to run
    1 x 1500w inverter at night
    1 x 80L national luna fridge
    1 x LED lights
    1 x Water pump

    It seems to cope well in both the the Navara and the trailer. I also do not watch how economically I use the fridge and freezer. I put warm stuff in the fridge every day, and open my freezer to my needs of Ice for my drinks as and when i want.
    Last edited by Madota; 2016/04/13 at 10:29 AM.
    Corne

  3. #23
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by Fluffy View Post
    Just a note on opening fridges too often.

    The temp inside the fridge is retained by the thermal mass of the contents.

    If a fridge is full of frozen/cool stuff then momentarily opening the fridge will only lose the energy contained in the air that escapes and is replaced by ambient temp air.

    And most camping fridge/freezers are chest freezers, so the cold air doesn't go rushing out.

    You would need to displace about 1 cubic meter of air, that's obviously 1m x 1m of air, to lose as much heat as putting a litre of ambient temp water in the fridge.

    So, to me trying to only open the door once a day is a misplaced quest.

    Besides the obvious losses through the insulation, the main driver would be how much "stuff" you use per day.

    Agreed, but Ice holds its temp much better (black body).
    If, like me, you are not running at freezing temps, then the loss of the air you mention actually has a bigger influence on the whole.
    Also, every bit helps:
    -Opening the fridge less
    -Optimizing the sun exposure to the panel.
    -Using the biggest wires possible.
    -Using the best charging equipment possible
    -Keeping the fridge itself as un-exposed as possible
    Adding it all up, you can extend your battery power by a lot.
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  4. #24
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    Default Re: Deep Cycle or High Cycle with Solar

    I'm intrigued as to what people are needing 600W and 1500W inverters at night for...


    Sent from my iPhone using Tapatalk
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  5. #25
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by SimonB View Post
    I'm intrigued as to what people are needing 600W and 1500W inverters at night for...


    Sent from my iPhone using Tapatalk
    600W will be perfect for a DSTV Decoder and 55" LED FlatSreen

    1500W for the hairdryer.
    Cheers

    ZS5KAD
    3 V8's
    NA TwinTurbo SuperCharger
    A V6 and an inline 4

    The frogs are starting to notice that the water is getting warm but it is already too hot to do anything about it.....

  6. #26
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by JK2008ZA View Post
    Hello Fluffy, wow, and you actually took the time to write that response, sad really, the post was sent late last night from my phone so this is how it came out. If you didn't care for my post or the lack of spacing why bother to reply anything.

    Some people I swear, this is an information forum, not an English exam. Nonetheless I will amend my post so I don't upset anyone else, goodness me.
    Zoo biscuit overdose

    Fluffy is usually full of advice and patience so we cut him slack when he's under the influence of Sugar Bunny ..

  7. #27
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by SimonB View Post
    I'm intrigued as to what people are needing 600W and 1500W inverters at night for...


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    To heat the water in the electrical hot water bags for warm feet when going to sleep
    Robert

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  8. #28
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    Default Re: Deep Cycle or High Cycle with Solar

    On the subject of protecting the fridge from exposure, sunlight etc.... do the fridge covers make any difference in this regard?

    I saw somewhere that a guy put thin polystyrene sheets in between the fridge cover and the fridge to help with insulation, do these covers do anything but protect the fridge from scratches?

  9. #29
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by JK2008ZA View Post
    On the subject of protecting the fridge from exposure, sunlight etc.... do the fridge covers make any difference in this regard?

    I saw somewhere that a guy put thin polystyrene sheets in between the fridge cover and the fridge to help with insulation, do these covers do anything but protect the fridge from scratches?
    For the scratch part yes it helps a lot. To me it definitely helps when the fridge is exposed to direct sunlight - I can feel the side is much cooler with the cover than without
    Robert

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  10. #30
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by SimonB View Post
    I'm intrigued as to what people are needing 600W and 1500W inverters at night for...


    Sent from my iPhone using Tapatalk
    In my case 1 000W - To run my CPAP device, mainly but it does include a healthy "safety" factor. i.e. Could probably get by with a lower capacity.
    Bearing in mind that when the inverter is ON the NL Fridge automatically accepts the 220V power in preference to the 12V and then we also charge "items" = cell phone, satellite, laptop, camera ....

    So, Ja, as they say in rugby circles (on TV, anyway).
    Answering the call of the wild is just so much beter than answering the telephone.
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  11. #31
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by Tweeling View Post
    For the scratch part yes it helps a lot. To me it definitely helps when the fridge is exposed to direct sunlight - I can feel the side is much cooler with the cover than without
    We cover ours with one of those reflective windscreen shields since it is mounted in the back of the canopy with the NICE BIG window in the hatch and sun tends to shine directly onto it.
    That does seem to make a real difference.
    Answering the call of the wild is just so much beter than answering the telephone.
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  12. #32
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by Fluffy View Post
    Just a note on opening fridges too often.

    The temp inside the fridge is retained by the thermal mass of the contents.

    If a fridge is full of frozen/cool stuff then momentarily opening the fridge will only lose the energy contained in the air that escapes and is replaced by ambient temp air.

    And most camping fridge/freezers are chest freezers, so the cold air doesn't go rushing out.

    You would need to displace about 1 cubic meter of air, that's obviously 1m x 1m of air, to lose as much heat as putting a litre of ambient temp water in the fridge.

    So, to me trying to only open the door once a day is a misplaced quest.

    Besides the obvious losses through the insulation, the main driver would be how much "stuff" you use per day.

    Fluffy, you made me curious re lid openings and the figures you give.

    I made some effort to look at specific heat tables and it turns out that inserting a mere 330ml can of beer would be more or less the equivalent of displacing a full cube of ambient air in the fridge. Put another way, 10 lid openings would typically exchange about 10 x 10l = 100l of air. This translates to inserting 33ml water at ambient temperature into the fridge. In simple language this means opening the lid several times a day is just plain insignificant.

    So realistically. Stop worrying about opening and closing the fridge lid and rather drink less beer. Better still, add another solar panel, drink more beer and stop worrying altogether.

    For the tech minded - approx figures at typical ambient temperatures:
    - specific heat of air at constant pressure: 1 kJ/kg.K
    - specific heat of water 4,187 kJ/kg.K
    - 1 cube meter of air = 1,27kg (1 cube m of air = 1m3 of air = 1000 liters)
    Eggie.

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  13. #33
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    Default Deep Cycle or High Cycle with Solar

    Inverter was on last night to charge two way radios. And fridge was running as well. Also used the lights to repack the Navara. This was where the battery was this morning.





    I had just start the Bakkie. The 10a on the meter is from the cteck charging the battery.

    Sent from my iPhone using Tapatalk
    Last edited by Madota; 2016/04/14 at 09:32 AM.
    Corne

  14. #34
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    Default Deep Cycle or High Cycle with Solar

    Quote Originally Posted by SimonB View Post
    I'm intrigued as to what people are needing 600W and 1500W inverters at night for...


    Sent from my iPhone using Tapatalk


    1. Bigger is always better
    2. why not
    Last edited by Madota; 2016/04/14 at 10:22 AM.
    Corne

  15. #35
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by Madota View Post
    Inverter was on last night to charge two way radios. And fridge was running as well. Also used the lights to repack the Navara. This was where the battery was this morning.

    I had just start the Bakkie. The 10a on the meter is from the cteck charging the battery.

    A reading just before you started the Navara would have been useful.

    The picture info says very little.
    The battery could even be quite far into its life, for one would expect the current to be higher and the voltage lower.
    Eggie.

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  16. #36
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    Default Deep Cycle or High Cycle with Solar

    Was at 88% before I started it and at 12.4 v


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    Last edited by Madota; 2016/04/14 at 12:53 PM.
    Corne

  17. #37
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    Default Re: Deep Cycle or High Cycle with Solar

    Quote Originally Posted by Eggie View Post
    So realistically. Stop worrying about opening and closing the fridge lid and rather drink less beer. Better still, add another solar panel, drink more beer and stop worrying altogether.
    Yes , its a holiday, its much less trouble get a decent solar set-up than to watch the fridge 24 hours.
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  18. #38
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    Default Re: Deep Cycle or High Cycle with Solar

    [QUOTE=JK2008ZA;3190793]Hi all, I know the Solar and battery topic has been excessively posted but I have very little experience in this department and I can't seem to find out what I need.


    Ok given that Solar is always based on relatives you can work on the following which takes a bit of calculation.

    Firstly check on the back of the panels what the amp rating is stated that they can deliver, this x2 panels minus some losses depending on panel quality and controller, and you can work safely on about 80 - 85% of stated capacity if you have good sunlight.

    This can be multiplied by the hours and you should get a close estimate of amps that can be put back into the batteries. In the day the fridge will run off the load and the extra available amps will charge the batteries and at night the fridge will run off the batteries and if not used often will switch on very few times.

    Just remember your fridge will run at higher amps at first until it reaches its set temp.

    An example I have of my own experience is that using my NL90 on a long weekend trip I took along 2 deep cycle batteries 200 ah each cooling the fridge the night before on electrics the switching to batteries as soon as we left, the fridge is set to switch off when the batteries reach low volt 10.5v. The first battery lasted with NO charge 2 and half days then I switched over to the other battery.

    Hope this helps with your calcs.

    Just remember that a fully charged battery loses its amps in a curve slow at first and faster towards the end when it is almost dead.
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  19. #39
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    Default Re: Deep Cycle or High Cycle with Solar

    High cycle is not advisable because it cannot handle the regular discharge and recharge cycles and will damage your battery.
    Last edited by bokvirsports; 2016/04/14 at 03:17 PM.
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  20. #40
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    Default Re: Deep Cycle or High Cycle with Solar

    My understanding is also that high cycle batteries are ideal for shallow discharges.
    In a solar application where bad weather can regularly deplete the battery to cut-out depth of charge I think a deep cycle, or better still, lead crystal will have a much longer life span in a camping application.
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