Use larger section cable?

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chatelot16
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Re: Use larger section cable?




by chatelot16 » 24/06/18, 14:06

if the regulator has a load terminal it has 2 functions, not only charge regulator but also protection against complete discharge: the load terminal is disconnected when the battery is too empty, which is essential not to wear it out too quickly

if we want to draw a large current it is possible that we exceed the possibility of the load terminal ... but it is then necessary to manage the discharge yourself so as not to overcharge ... the inverters often have cut-off voltage too bass that allow them to discharge the battery too deep, so to use them too quickly
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kau
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Re: Use larger section cable?




by kau » 24/06/18, 21:22

Thank you, in the event of a voltage drop, the Load terminal protects me against deep discharge. This is the technical part. And for the practical question:
1- I can or not connect a "12-24v" fridge and a bulb on the Load terminal?
2- If not, what connection should be made?
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Forhorse
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Re: Use larger section cable?




by Forhorse » 24/06/18, 22:05

it depends on the maximum intensity that this "load" terminal can pass
On many regulators, it is just intended to manage the lighting, therefore a rather weak current. If consumption exceeds what this terminal can pass, then information must be relayed.
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kau
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Re: Use larger section cable?




by kau » 24/06/18, 22:12

Forhorse wrote:it depends on the maximum intensity that this "load" terminal can pass
On many regulators, it is just intended to manage the lighting, therefore a rather weak current. If consumption exceeds what this terminal can pass, then information must be relayed.

Thank you. And is there a device to connect directly to the battery for lighting?
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Re: Use larger section cable?




by izentrop » 25/06/18, 00:05

Forhorse wrote:On many regulators, it is just intended to manage the lighting, therefore a rather weak current. If consumption exceeds what this terminal can pass, then information must be relayed.
Weird as it works http://forum-photovoltaique.fr/viewtopi ... e1#p441804

Relay but not just how, cutting an inductive load in DC can be problematic.
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Re: Use larger section cable?




by Forhorse » 25/06/18, 08:39

In agriculture, "automobile" relays are used, some of which are characterized to support up to 100A; we control with electric motors that consume up to 30A without problem.
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Re: Use larger section cable?




by chatelot16 » 25/06/18, 10:40

kaou wrote:Thank you, in the event of a voltage drop, the Load terminal protects me against deep discharge. This is the technical part. And for the practical question:
1- I can or not connect a "12-24v" fridge and a bulb on the Load terminal?
2- If not, what connection should be made?



we can not guess, since you give neither the maximum current of the load terminal of your regulator ... you give neither the power of your fridge or your lamp

if you want to draw a current higher than the nominal current of the load terminal, you can put a relay controlled by the load terminal ... but it's a shame because the large relays consume a significant current

the simplest is to choose a regulator which has a sufficient available current ... it does not matter if that obliges to take a regulator envisaged for a power higher than the panel which one has

the advantage is that the mos transistor which supplies the load terminal consumes no current, unlike a relay or contactor
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