Complete Solar solution




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  1. #1
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    Default Complete Solar solution

    Apologies for what is certainly a repeat thread. Simply don't have the time to scroll through the large variety of threads on this topic.
    I have a Metalian Maxi that have had two 105 ah batteries installed. These are now almost 5 years old and seem to have lost its umph. I need to replace them. They have served me well, but mostly under circumstances where I had access to electricity to recharge. I've now planned a trip to a place next month without electricity, will be there for 6 days and with the 80lt NL fear I will run out of juice. I only use 12V for the fridge, some lights and a water pump.
    So some questions:
    1) Do I go two batteries again and nurse my available battery power or do I go one battery and a solar kit?
    2) What solar kit and where can I purchase it in Cape Town?
    3) Which battery and where can I buy them? There are so many different technology solutions available nowadays.
    Thanks for the help guys.

  2. #2
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    Default Re: Complete Solar solution

    4x4Direct - http://www.4x4direct.co.za/

    They have EVERYTHING you need for this project !

    size of the solar panel to match your electrical load

    100 to 120W for a single fridge installation, lights etc ...

    single battery

    WRND dual charger

    and go and enjoy that holiday

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  4. #3

    Default Re: Complete Solar solution

    Quote Originally Posted by Munnika View Post
    Apologies for what is certainly a repeat thread. Simply don't have the time to scroll through the large variety of threads on this topic.
    I have a Metalian Maxi that have had two 105 ah batteries installed. These are now almost 5 years old and seem to have lost its umph. I need to replace them. They have served me well, but mostly under circumstances where I had access to electricity to recharge. I've now planned a trip to a place next month without electricity, will be there for 6 days and with the 80lt NL fear I will run out of juice. I only use 12V for the fridge, some lights and a water pump.
    So some questions:
    1) Do I go two batteries again and nurse my available battery power or do I go one battery and a solar kit?
    2) What solar kit and where can I purchase it in Cape Town?
    3) Which battery and where can I buy them? There are so many different technology solutions available nowadays.
    Thanks for the help guys.
    If you have a fridge that can work off both AC and DC then rather buying 2x batteries I would buy one and an inverter and run fridge using AC as it will use less amps from your battery.

    Nice thing about inverter is that you can also use it around the house when main power is out.

    4x4 direct can build a small battery box to cater for your own needs. Otherwise consider NL box at Outdoor warehouse.

    Solar panels from s Co like Bundu Power. ODW is crazy with solar prices.

    My personal opinion....

  5. #4
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    Default Re: Complete Solar solution

    Quote Originally Posted by Therackermann View Post
    If you have a fridge that can work off both AC and DC then rather buying 2x batteries I would buy one and an inverter and run fridge using AC as it will use less amps from your battery.

    Nice thing about inverter is that you can also use it around the house when main power is out.

    4x4 direct can build a small battery box to cater for your own needs. Otherwise consider NL box at Outdoor warehouse.

    Solar panels from s Co like Bundu Power. ODW is crazy with solar prices.

    My personal opinion....
    No no no, please no. Very very bad idea.

    A fridge that can do 12V and 220V is a 12V fridge with a 220V to 12V power supply inside.

    So you are going 12V bat - Inverter to 220V - Internal Power supply back to 12V - 12V fridge. Instead of 12V bat - 12V fridge. Much less efficient and a whole bunch of unnecessary fault prone equipment in line.
    Cheers

    ZS5KAD Yeasu Ft-897D
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  7. #5

    Default Complete Solar solution

    Quote Originally Posted by Fluffy View Post
    No no no, please no. Very very bad idea.

    A fridge that can do 12V and 220V is a 12V fridge with a 220V to 12V power supply inside.

    So you are going 12V bat - Inverter to 220V - Internal Power supply back to 12V - 12V fridge. Instead of 12V bat - 12V fridge. Much less efficient and a whole bunch of unnecessary fault prone equipment in line.
    In my particular case I respectfully strongly disagree with your statement as it is definitely my personal experience nor Ohms law.

    What fridge are you using?
    Last edited by Therackermann; 2018/06/15 at 06:07 AM.

  8. #6
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    Default Re: Complete Solar solution

    Quote Originally Posted by Therackermann View Post
    If you have a fridge that can work off both AC and DC then rather buying 2x batteries I would buy one and an inverter and run fridge using AC as it will use less amps from your battery. .

    No No No not true
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  10. #7
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    Default Re: Complete Solar solution

    Stay away from inverters....very bad idea.
    Let's go Camping

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  12. #8
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    Default Re: Complete Solar solution

    Quote Originally Posted by Therackermann View Post
    If you have a fridge that can work off both AC and DC then rather buying 2x batteries I would buy one and an inverter and run fridge using AC as it will use less amps from your battery.
    Wrong.
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  14. #9
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    Default Re: Complete Solar solution

    You should have the Hdcp controller in your trailer. It normally has a Solar Charger fitted as standard. Have a look, there should be a connection point under the controller marked Solar +-
    All you need is to connect a panel to this point. There should be several Solar shops in Cape Town. Buy one 100 to 120watt standard glass panel. You store it under the mattres in the tent. Connect to controller.

    Problem solved.

    Even with 2 batteries you are looking at 3 days max before the fridge turns into a pie warmer.
    Let's go Camping

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  16. #10
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    Default Re: Complete Solar solution

    Quote Originally Posted by Therackermann View Post
    If you have a fridge that can work off both AC and DC then rather buying 2x batteries I would buy one and an inverter and run fridge using AC as it will use less amps from your battery.

    Nice thing about inverter is that you can also use it around the house when main power is out.

    4x4 direct can build a small battery box to cater for your own needs. Otherwise consider NL box at Outdoor warehouse.

    Solar panels from s Co like Bundu Power. ODW is crazy with solar prices.

    My personal opinion....
    No not at all. You have losses going from 12v pumping it up to 240v, then from 240 bringing it down to 12v again. Its always better to stay with 12v.

    I am running 2 fridges in my vehicle and never run out of power. Got a dc to dc charger [50A] and a 180W solar panel. Also got a small 200w victron pure sine inverter for laptop and my sleep apnea machine. Never for a fridge and use the inverter when the car is running.
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  18. #11
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    Default Re: Complete Solar solution

    Quote Originally Posted by Therackermann View Post
    In my particular case I respectfully strongly disagree with your statement as it is definitely my personal experience nor Ohms law.

    What fridge are you using?
    Right, let’s take this nice and slowly.

    Please explain what you mean by “nor ohms law”.

    Maybe some rounded off and illustrative values and calculations if you don’t mind.
    Last edited by Fluffy; 2018/06/15 at 08:21 AM.
    Cheers

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  19. #12
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    Default Re: Complete Solar solution

    I have a few questions for the OP.

    How are you charging the batteries presently ?

    Do you charge while driving ?

    Do you want a temp fix ?

    Do you have the appetite and funds for a good solid solution ?
    Cheers

    ZS5KAD Yeasu Ft-897D
    3 V8's
    A V6 and an inline 4
    The nice thing about going the extra mile - the road is never congested.

  20. #13
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    Default Re: Complete Solar solution

    Quote Originally Posted by Chukudeer View Post
    You should have the Hdcp controller in your trailer. It normally has a Solar Charger fitted as standard. Have a look, there should be a connection point under the controller marked Solar +-
    All you need is to connect a panel to this point. There should be several Solar shops in Cape Town. Buy one 100 to 120watt standard glass panel. You store it under the mattres in the tent. Connect to controller.

    Problem solved.

    Even with 2 batteries you are looking at 3 days max before the fridge turns into a pie warmer.
    This.

    You only need a decent solar panel. No less than 120W.

    And stay with 2 batteries.
    Last edited by Die SwartKat; 2018/06/15 at 08:36 AM.
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  22. #14
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    Default Re: Complete Solar solution

    Quote Originally Posted by Therackermann View Post
    In my particular case I respectfully strongly disagree with your statement as it is definitely my personal experience nor Ohms law.

    What fridge are you using?
    NL 80litre single door.

  23. #15
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    Default Re: Complete Solar solution

    Quote Originally Posted by Chukudeer View Post
    You should have the Hdcp controller in your trailer. It normally has a Solar Charger fitted as standard. Have a look, there should be a connection point under the controller marked Solar +-
    All you need is to connect a panel to this point. There should be several Solar shops in Cape Town. Buy one 100 to 120watt standard glass panel. You store it under the mattres in the tent. Connect to controller.

    Problem solved.

    Even with 2 batteries you are looking at 3 days max before the fridge turns into a pie warmer.
    Thanks Chukudeer. My Metalian is one of the first, so it did not come with the Hdcp controller. I built one myself. It has a 10amp charger, high amp switch to select between the two batteries (or both) and 220v outlets.

  24. #16
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    Default Re: Complete Solar solution

    Quote Originally Posted by Fluffy View Post
    I have a few questions for the OP.

    How are you charging the batteries presently ?

    Do you charge while driving ?

    Do you want a temp fix ?

    Do you have the appetite and funds for a good solid solution ?
    The two batteries are currently only charged via an installed 10v charger using 220v.
    I previously was able to charge it via my vehicle (NL alternator switch). I sold this vehicle and replaced it with the new Nissan Navara. I was advised not to install the NL alt switch in this vehicle. So currently no charging from my vehicle.
    I want a permanent fix. My next camp is static for 6 days, so charging from the vehicle is not an option now.
    I have a budget of 10k

  25. #17
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    Default Re: Complete Solar solution

    Quote Originally Posted by Munnika View Post
    The two batteries are currently only charged via an installed 10v charger using 220v.
    I previously was able to charge it via my vehicle (NL alternator switch). I sold this vehicle and replaced it with the new Nissan Navara. I was advised not to install the NL alt switch in this vehicle. So currently no charging from my vehicle.
    I want a permanent fix. My next camp is static for 6 days, so charging from the vehicle is not an option now.
    I have a budget of 10k
    10amp charger I mean

  26. #18
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    Default Re: Complete Solar solution

    Quote Originally Posted by Munnika View Post
    10amp charger I mean

    I assumed that

    Lets look at two scenarios.

    -----------------------------
    If your trailer has space for two batteries, then perhaps get two decent quality starter batteries.

    Get 2 x 80W panels and a nice cheap PWM Solar controller.

    2 x Enertec/Enegizer Batteries < R2K each

    2 x Solar Panels < R1K each

    1 x PWM Solar Regulator < R1K

    Easily do-able with R10K
    -----------------------------


    -----------------------------
    If your trailer has space for two batteries, then perhaps get two decent quality Solar batteries.

    Get 2 x 70W panels and a nice MPPT Solar controller.

    - 2 x Vision 100AH Deep Cycle batteries R2450.00 each
    - 1 x Victron 15A MPPT charger R1665.00
    - 2 x 80W solid Solar Panels R800 each

    This would be a decent piece of kit and that leaves some cash for cables and fuses etc
    -----------------------------

    -----------------------------
    Prices off the Internet - 4x4 Direct.

    There are many many other options and configurations.
    Cheers

    ZS5KAD Yeasu Ft-897D
    3 V8's
    A V6 and an inline 4
    The nice thing about going the extra mile - the road is never congested.

  27. #19
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    Default Re: Complete Solar solution

    Agreed, you need 2 new batteries and something like this.....

    2 x 80watt panels and a cheap controller, will cost you far less than R10K, easy to add 2 hinges and a handle......
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    Let's go Camping

  28. #20
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    Default Re: Complete Solar solution

    Quote Originally Posted by Chukudeer View Post
    Agreed, you need 2 new batteries and something like this.....

    2 x 80watt panels and a cheap controller, will cost you far less than R10K, easy to add 2 hinges and a handle......
    Thanks gents, this looks quite viable. I'll look into it right away.

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