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Post Info TOPIC: Solar ???????


Newbie

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Solar ???????


Hi guys new here and would like some help please .Ok here we go I have 300watts of solar panels on the roof of my van feeding 2x120amp agm batteries with a 30amp tps 1230 pwm controller that gets very hot to touch is this ok or should I purchase a new one with higher amps also what is a good brand to buy ???? Also is it ok to conect a seperate 200amp folding panel straight to the batteries with its own controller with the roof panels still connected or should they all run through one controller ??Thank you any help greatfully appreciated š

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Senior Member

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Check that the wires going into solar controller are all tight as it seem like it may  be a loose or dirty connection 

Dragonfly1



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C Geyer


Guru

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Hello dickymate

I am not an Electrician

I have the same amount of solar, and the same amount of battery but a different controller/regulator/charger

There may be something wrong with your 30 amp PWM controller side of things if it is getting hot
If your controller is an el-cheapo $30 EBay one then the markings on the outside may not be what is inside
If your controller is a reputable $300 plus one then as dragonfly 1 has already said, it may be loose wires or dirty connection

My controller/regulator/charger is a CTEK DC/DC

I see something like 14 plus amps going from the solar to the battery and the controller is not warm
With the engine running the full 20 amps go to the battery and the controller is warm, but never hot

I believe that the consensus for us laymen, is that you should not have two regulators/controllers/ chargers, going to the same battery bank
Some techs say that it can be done

At the moment my system is suitable for my needs
I am thinking of a lightweight portable 200 watt, for the times I am under the shade, or not facing the sun

I have a thermal 30 amp re-settable fuse from the solar to the solar charger
My intention is to stop the roof solar going into battery, while the portable solar is connected either through the controller or direct to the batteries

Hope that this info is useful to you


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Tony

It cost nothing to be polite



Senior Member

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Hi

Solar reg getting hot hmm... probably not the best but u need to compare with same brand . My Mppt does not get hot but then again i dont touch the heat sink either . Not noticeable .Pumping 400watts into either single or dual 120ah . 195 fixed and 195 portable wired thru 1 x MPPT 30amp

Many people run 2 regulator setups . As u described there on board controller is maxed so they just buy a stand alone portable setup and connect straight to batts .
Not ideal but doable .

As mentioned all connections and existing wiring ccondition and sizing needs to be correct . The connectors in my panels were loose and done by a reputable company !!!!



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Guru

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Is the compartment that it is mounted i well ventilated? That will have a big bearing on how hot it gets.

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PeterD
Nissan Navara D40 diesel auto, Spaceland pop-top
Retired radio and electronics technician.
NSW Central Coast.



Guru

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Hi Dick 

How hot is it getting ??

[1]Can you comfortably touch  it or put your hand on it.??

[2] is it open to cooling air  ,not contained in a cupboard or similar ?

 [3]  Definitely check connections for localised  heating



-- Edited by oldtrack123 on Sunday 6th of May 2018 05:51:02 PM

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Guru

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My Mppt is under the bed near the battery I have only portable panels and being in a confined space it does not get hot at all,I would think that most regs would be inside there Rvs not outside in the air streams??...



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Guru

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Ron-D wrote:

My Mppt is under the bed near the battery I have only portable panels and being in a confined space it does not get hot at all,I would think that most regs would be inside there Rvs not outside in the air streams??...


 I doubt that ANYONE is suggesting that the reg be outside the vanno



-- Edited by oldtrack123 on Monday 7th of May 2018 01:58:17 PM

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Senior Member

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Outside cabinetry š

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Guru

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Barboots wrote:

Outside cabinetry š


 Yes ,or where there is free air movement  to allow the  generated heat to escapebiggrin

All electrical equipment generates heat in use & requires adequate coolingsmile



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Guru

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The bed has not gotten any warmer with the reg under it.biggrin



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Newbie

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Hi guys Thankyou for all your replies I checked connections like dragonfly1 said and seems to be ok now so far all good sorry for slow reply as our Nbn has been down again šš

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