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Solar chargers, wondering about the output connector

Started by Sonnich Jensen September 18, 2017
Hi

I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I wonder:

It has a connector for the solar panel, and for the battery.
Here I'd just consume from the battery?

They have an output for consumption - have anybody taken them apart and can tell me  why?

I could see the use of a LC filter, as the charger with MPPT could give a spike which could kill some electronics later on the line, but other than that - why is separately?

Or just for convince?

On Monday, September 18, 2017 at 4:23:57 PM UTC-4, Sonnich Jensen wrote:
> Hi > > I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I wonder: > > It has a connector for the solar panel, and for the battery. > Here I'd just consume from the battery? > > They have an output for consumption - have anybody taken them apart and can tell me why? > > I could see the use of a LC filter, as the charger with MPPT could give a spike which could kill some electronics later on the line, but other than that - why is separately? > > Or just for convince?
Some disconnect the load if the battery voltage runs too low, like at night.
El 18/09/2017 a las 22:23, Sonnich Jensen escribió:
> Hi > > I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I wonder: > > It has a connector for the solar panel, and for the battery. > Here I'd just consume from the battery? > > They have an output for consumption - have anybody taken them apart and can tell me why? > > I could see the use of a LC filter, as the charger with MPPT could give a spike which could kill some electronics later on the line, but other than that - why is separately? > > Or just for convince? >
Our chargers disconnect the consumption on low battery or overcurrent, and also measure the output current so they can show instantaneous current, peak current and integrated current with time (A·h). -- Saludos Miguel Giménez
I looked at some available here, and given that they are not MPPT chargers, then what are in them?

I see that they have some voltage protection, and probably a diode for only charging the battery.
Does something as simple as this contain anything else?

http://www.taastuvenergia.ee/pdf/phocos_eco_10.pdf

Essetially, I can do that with a diode myself






On Monday, September 18, 2017 at 11:23:57 PM UTC+3, Sonnich Jensen wrote:
> Hi > > I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I wonder: > > It has a connector for the solar panel, and for the battery. > Here I'd just consume from the battery? > > They have an output for consumption - have anybody taken them apart and can tell me why? > > I could see the use of a LC filter, as the charger with MPPT could give a spike which could kill some electronics later on the line, but other than that - why is separately? > > Or just for convince?
On Wed, 20 Sep 2017 11:02:15 -0700 (PDT), Sonnich Jensen
<sonnichjensen@gmail.com> wrote:

>I looked at some available here, and given that they are not MPPT chargers, then what are in them? > >I see that they have some voltage protection, and probably a diode for only charging the battery. >Does something as simple as this contain anything else? > >http://www.taastuvenergia.ee/pdf/phocos_eco_10.pdf > >Essetially, I can do that with a diode myself > > > > > > >On Monday, September 18, 2017 at 11:23:57 PM UTC+3, Sonnich Jensen wrote: >> Hi >> >> I have looked at designs of solar chargers, MPPT chargers etc. Nothing complicated there, but when I look at available chargers, I wonder: >> >> It has a connector for the solar panel, and for the battery. >> Here I'd just consume from the battery? >> >> They have an output for consumption - have anybody taken them apart and can tell me why? >> >> I could see the use of a LC filter, as the charger with MPPT could give a spike which could kill some electronics later on the line, but other than that - why is separately? >> >> Or just for convince?
Those kinds of controllers are what they call PWM type. They usually have a power FET in them that is on full when the battery is being bulk charged and then they PWM the connection between PV input and battery output to regulate the average DC voltage at the Float and Absorb voltage. They usually have another FET to control a load like a light circuit. Simplest types of controllers. The PV module must have its maximum power point voltage just above the highest battery voltage by usually a couple of volts... At 25 degrees C. MPPT charge controllers normally use a buck converter so the PV can be quite a bit higher in voltage than the battery which can be an advantage. boB