Impressed with China Pure Sine Wave Inverter - Page 38





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  1. #741
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by plunger View Post
    There are still very few builds showing how you put your inverters together.
    I took photos of my build and put them together with layout.

    I bought a wooden toy box from Mr Price Home and then installed everything inside the box.


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  3. #742
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    Default Re: Impressed with China Pure Sine Wave Inverter

    This is a near perfect job done. Right down to the positioning of the 2 leads that go to the inverter.

    Are there any fuse used between the batteries and inverter?
    Last edited by ekkekan; 2020/04/05 at 03:47 PM.

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  5. #743
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Thanks.

    No, the only fuses I wired in are between the batteries and the NL battery monitor. I figured the inverter already has a fuse, although not easily accessible.

  6. #744
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Thug View Post
    Thanks.

    No, the only fuses I wired in are between the batteries and the NL battery monitor. I figured the inverter already has a fuse, although not easily accessible.
    Thats very smart.

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  8. #745
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Thug View Post
    Thanks.

    No, the only fuses I wired in are between the batteries and the NL battery monitor. I figured the inverter already has a fuse, although not easily accessible.
    Are the fans not running almost constantly now that the inverter is inside a box? Is the charger below your inverter? Please post the dimensions of the box if you don't mind, seems like a good solution for me too, as long as I can fit my battery.

  9. #746
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Morne - Skip View Post
    Are the fans not running almost constantly now that the inverter is inside a box?
    From what I can determine the fans are triggered by the actual load and not temp. Mine switches on on the same load even when the temp is 16 or 25 deg. It is also instantly before there is time for the temp to rise under loads over about 300W.
    Last edited by ekkekan; 2020/04/06 at 12:15 PM.

  10. #747
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Morne - Skip View Post
    Are the fans not running almost constantly now that the inverter is inside a box? Is the charger below your inverter? Please post the dimensions of the box if you don't mind, seems like a good solution for me too, as long as I can fit my battery.
    The whole unit is currently unplugged although the batteries are on trickle charge.

    When I ran the inverter on Saturday evening for almost 3 hours, the amount drawn through the inverter didn't even warrant the fans going on. Yes, the inverter was warm to touch but not excessively so. That's also why I drilled the holes, to aid in airflow.

    Yes, the charger sits below the inverter.

    Inside Dimensions of the box are: 460mm (l) x 355mm (w) x 255mm (d)

    I had to add wooden supports underneath to support the weight and also then added on the castor wheels.

  11. #748
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Thug View Post
    The whole unit is currently unplugged although the batteries are on trickle charge.

    When I ran the inverter on Saturday evening for almost 3 hours, the amount drawn through the inverter didn't even warrant the fans going on. Yes, the inverter was warm to touch but not excessively so. That's also why I drilled the holes, to aid in airflow.

    Yes, the charger sits below the inverter.

    Inside Dimensions of the box are: 460mm (l) x 355mm (w) x 255mm (d)

    I had to add wooden supports underneath to support the weight and also then added on the castor wheels.
    thank you, yeah that box is too small.

  12. #749
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    Default Re: Impressed with China Pure Sine Wave Inverter

    I'm looking for advice here, I also bought a 24v 2000w PSW UPS for the fridges (AliExpress, Chinese), and it worked fine, but after a 24 hour power down episode it appears that the stress on the charger module was excessive, and that popped.

    So, although the Inverter side works perfectly, and switches over correctly, the unit will no longer charge the batteries (2 * 12v).

    I have a Victron 24v charger that charges the batteries perfectly when they are disconnected from the system, but when the batteries are connected to the system, the Victron overcharges the batteries, it goes up to 30v before switching off, and seems to maintain the batteries at a too high voltage (over 27v).

    The batteries may already be damaged because of this, not sure, will have to test.

    I assume that the UPS electronics are confusing the charger, so it doesn't work properly.

    Obviously, for manual use it is ok, but I can't really leave the setup enabled when I go away, which partly negates the whole purpose of the exercise.

    Any ideas on how to resolve this ?
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  13. #750
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Jola View Post
    I have a Victron 24v charger that charges the batteries perfectly when they are disconnected from the system, but when the batteries are connected to the system, the Victron overcharges the batteries, it goes up to 30v before switching off, and seems to maintain the batteries at a too high voltage (over 27v).

    The batteries may already be damaged because of this, not sure, will have to test.
    My take on this is that trickle for the Victron at 30V is 100%. Normally a 12V would trickle at 13.6V. Also during the bulk stage charging up to 14.6V for 12V is spot on so even your 30V is 100% to me.

    The UPS which at times does not do 3 stage charging might not like the 30V but nothing wrong with it.

    The best would be to disconnect the batteries and let the Victron charge them full and then do a load test with them connected to the inverter.

    Please share details of the UPS. Make? Model? or a link on a web site. If it was a line inter-active then one or both of the 2 chargers would pop.

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  15. #751
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by plunger View Post
    There are still very few builds showing how you put your inverters together.

    Ok, so I’m not done yet, but here are some pics of what my setup will look like.
    Remaining is the following:


    • Connect a fuse or two (can be seen on the shelf)
    • Drill a hole in the wall to bring the panel cables into the garage to meet the charge regulator, and from thereon to the batteries.


    I decided against making this a portable unit seeing as any means of transportation would require an upgraded suspension to the said means of perambulation. These batteries are probably a 1/3rd of my vehicle’s weight.

    I have 3x 135 solar panels already wired for business and went with BH plugs to couple them in parallel.

    It is obviously a safety issue, but what would’ve been great is if these plugs could be reversed.

    Then I could have made two additional short BH leads and by simply plugging them into the existing leads between the 3 panels the other way around and thereby reversing “polarity”, I can change the setup between parallel and series just by adding or removing them. Or is my thinking flawed here?

    This is if my 24V Changi ever arrives..... For now I will go with a 12V system.

    Two AC chargers also at the ready which I use on the vehicles, one of which can do 24V at 7 amps.
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    Nico Swart

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  16. #752
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Nico the series is straight forward if you still have the MC4 connections on your panels between each panel. Then using one of each of these splitters you can still make the || connection between the 3. It's just a matter is it needed?
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  17. #753
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by ekkekan View Post
    Nico the series is straight forward if you still have the MC4 connections on your panels between each panel. Then using one of each of these splitters you can still make the || connection between the 3. It's just a matter is it needed?
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    Where can one get these splitters in Pta?
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  18. #754
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by ekkekan View Post
    Nico the series is straight forward if you still have the MC4 connections on your panels between each panel. Then using one of each of these splitters you can still make the || connection between the 3. It's just a matter is it needed?
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    I do not have those MC4 connectors, my panels was bought 2nd hand a few years back.

    But I do believe they are expensive, more than the BH plugs I think if memory serves.

    But are you saying my connections is in series now? All three panels are wired (+) to (+) to (+) and (-) to (-) to (-)

    I don't suppose a series connection is required for my small setup, but it would be nice to have the option should the need arise. It is not easy working with thick cables inside the connection boxes.
    Nico Swart

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  19. #755
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Die SwartKat View Post
    I do not have those MC4 connectors, my panels was bought 2nd hand a few years back.

    But I do believe they are expensive, more than the BH plugs I think if memory serves.

    But are you saying my connections is in series now? All three panels are wired (+) to (+) to (+) and (-) to (-) to (-)

    I don't suppose a series connection is required for my small setup, but it would be nice to have the option should the need arise. It is not easy working with thick cables inside the connection boxes.
    What I did mean was if you still had the MC4 connectors on the panels each would have had the + and - on each panel and then the series was easy. The way you have it they are in || and I would leave it like that.

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  21. #756
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Sneaky Pete View Post
    Where can one get these splitters in Pta?
    Any solar shop, or Takealot sells them... but during lockdown it may be an issue

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  23. #757
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Quote Originally Posted by Sneaky Pete View Post
    Where can one get these splitters in Pta?
    You can try GC Solar there opposite 4x4Direct after lockdown. Also look at 4x4Direct first as GC Solar are a bit expensive. Communica would also have them but then it is a drive out to Midrand. Don't forget AC/DC as well. The other as already mentioned is Takealot and you can arrange to collect it at the depot close to Chamberlains I think it is in Edison Singel.

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  25. #758
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    Default Re: Impressed with China Pure Sine Wave Inverter

    Ok, I am up and running!

    With my panels wired up, I'm putting the setup through its paces.

    Drawing load in the house currently:

    - Plasma TV
    - My Giga TV box
    - 2 x D-Link routers
    - 50W base station two way radio
    - 2 x Laptops
    - 5 portable hand radios permanently on chargers
    - 5 x 12V lights permanently on charge
    - A Play Station 4 with 24" screen
    - 2 x fridges, one of which has a freezer section
    - 1 x Chest freezer

    When everything is running, the unit is just about at its limit at 1500W

    When the fridges and freezer goes into standby mode and the very old plasma tv is off, the wattage drops and fluctuates between 600 - 850W

    As has already been pointed out by others, I can confirm:

    - The slight discrepancy in the volt reading with a multimeter
    - the fans switches on at anything above 500W. Not that the unit is hot in any way. It is still cold after 3 hours of use.

    Overall I'm very happy with this unit and it does exactly what I want it to.

    And now I'm scared of what has been pointed out in soooo many other threads. The need to go bigger and better all the time....

    And as can be seen, I still have plenty of space on my garage roof.
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    Nico Swart

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  26. #759
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    Default Re: Impressed with China Pure Sine Wave Inverter

    I fitted a decent plug to mine
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