I currently run my ctek d250s connected to two 100ah lead crystal batteries.
Ctek d250s solar panel size.
I want to add solar panels but the manual that comes with unit is silent on the question of what solar input it is able to handle so i queried it with ctek sweden and the following reply has come back from them.
It has been working fine.
You can also assist the power you get from your ctek d250 by adding a ctek smartpass to your system.
I have a 250w panel which is under the max voltage at open circuit.
Just wanted to confirm difference and maybe this justifies the price difference.
I added a 250w solar panel today connected it to the d250s to charge while i m not driving.
As stated max permitted is 21 22v.
If i attach 3 100w solar panels at 12v or 13v im ok on the ctek at about 25 or 23 amps.
I ve had a ctek d250s in my hilux canopy for a few years.
Most panels seems to have an output above 30v.
It seems to be able to both step up and step down the voltage from both sources to do the 5 stage charging.
Warning when using with solar panels the panel open circuit voltage must not exceed 23v dc or the ctek unit may be damaged and the warranty voided.
The ctek d250 has a built in solar regulator so the panels you use do not need additional regulators.
Total power rating of the solar panel.
Ctek 250s dual specs and yeah i don t see any solar specs either.
I cannot keep the battery charged with the alternator and solar panel.
And the 5 stage charging can get its power from a solar panel or the alternator.
I put a volt meter to solar panel and it puts out 22 volts open circuit.
I assume they are more suited to a house solar system rather than a 4x4 camping setup.
3 i got from a previous question i asked that the maximum input on the solar side for the ctek was 25a.
Standard wiring for ctek d250s dual.
Alternator is a standard non electronic type.
It is a temperature compensated 5 stage charger battery isolator and mppt controller.
If you do use the ctek d250 with panels that have built in solar regulators it will still charge but not as efficiently.
It charges my two 100ah agm batteries for my fridges and lighting via the alternator.
Open circuit voltage of solar panel in full sun is 22 volts dc max.
Minimum solar panel is 40w and a maximum 500w.
I tried 2 different batteries.
Do not use with panels connected in series.
No external regulator is to be fitted on solar panel.
I wanted to know what the input limit was on the redarc.
If using multiple panels connect in parallel and ensure open circuit voltage is less than 23v dc.
