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mppt display

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Created by aus005 > 9 months ago, 16 Feb 2015
aus005
TAS, 514 posts
16 Feb 2015 11:33AM
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hi guys can any one help to explain this dispay to me thanks i installed it the other day and am a bit confused the instructions were rubbish


Crusoe
QLD, 1197 posts
16 Feb 2015 10:58AM
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Have you tried youtube. There's a few vids there.

aus005
TAS, 514 posts
16 Feb 2015 3:36PM
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thanks crusoe
watched that evaluation and it is exactly the same as mine not showing the input correctly.
i looked at a couple of other evaluations as well and have asked for my money back it seems this one is a dud and not what it is advertised as

Charriot
QLD, 880 posts
16 Feb 2015 8:16PM
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aus005,
like your unit, my guess is it is one of better ones.
ignore the evaluation, this guy doesn't know what he is doing

your readings are perfect, solar 13.9 V
bat. 12.4 V
current capacity 67%

as far as here all sweet
please explain, what is connected and why to terminal " LOAD"
nothing should be connected there unless, there is a special reason
----------------------------------------

that guy has solar 17V and battery 11.4V anyone know why?
that is a loss of 5.6V sorry he fail miserably



Jolene
WA, 1620 posts
16 Feb 2015 9:03PM
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Without trying to cause confusion, the load terminals usually feed the main power board, so when you switch on a light,fridge,sounder or radar etc,etc the amount of power those items draw can be monitored , usually in amps and amp/hours out. You have to be careful that the amount of load doesn't exceed the limits of the controller/reg. For example I have a 20amp solar reg/monitor. If I was to hook up the load terminal to 3 x100w spotlights, with a 12vlt system that would draw approx 25 amps and exceed the 20amp capacity of the monitor. That load of 25 amps could damage the unit or it may shut it down.
Some units have an option of being able to turn the load on and off manually( like a main switch to the switch board), or some even disconnect the load if the battery voltage drops below a set voltage to protect the battery. In that case everything you connect to the load will shut down.
Invertors for 240 vlt and chargers should never be connected to the load, they should go directly to the battery.
The load is a pretty neat feature of a solar charge reg when wired into a boats electrical system.

HG02
VIC, 5814 posts
17 Feb 2015 12:23AM
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Charriot
I am thinking of buying two 12 volt 120 watt flexible panels they may be shaded from the boom one or both at some stage would it be better to run them in parallel or series? that is 24 volt combined or 12 volt panels

Charriot
QLD, 880 posts
16 Feb 2015 11:30PM
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My suggestio is never use this feature of MPPTs

...nearly impossible constantly monitor drawn current
....the boat wiring must be in most cases rewired, not to accomodate
high current equipment
.....in case of overloading you relay on internal protection to blow the fuse or cut off
supply.......than you loose instantly all your house power
....in case internal fuse doesn't blow, you end up burning unit / wires or maybe fire.

I just can imagine sailing at night with Nav. lights and a few instruments ON
start using a spot light and someone use VHF Tx. BLACK OUT. non recoverable isn't it?

Charriot
QLD, 880 posts
16 Feb 2015 11:33PM
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the most common controllers are / I am using about $12 one /
are for parallel combination
use that

HG02
VIC, 5814 posts
17 Feb 2015 12:47AM
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Select to expand quote
aus005 said..
thanks crusoe
watched that evaluation and it is exactly the same as mine not showing the input correctly.
i looked at a couple of other evaluations as well and have asked for my money back it seems this one is a dud and not what it is advertised as


As Charriot said you should not use the load connection on the MPPT Id be interested to know what you have connected it to ?

Charriot
QLD, 880 posts
17 Feb 2015 12:27AM
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HG. you know why parallel

because all batteries are charge by current
when you put panels parallel ...current from one panel is added to current from the other

sure you need a voltage to push voltage through, but typically panels supply more than enough

aus005
TAS, 514 posts
17 Feb 2015 7:42AM
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hi guys i was missing in action
on the load i have connected a depth sounder as it is positioned just above the controller and it was a easy power source to hook into is this ok i never really thought about it thanks



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