Question 1

X How many 100 watt panels can I fit to this controller please

Accepted Answer

Hello,the maximum solar input power is 520W if your system voltage is 12v. If your system voltage is 24v, the max solar input power is 1040W. -SL

Question 2

Can anyone confirm if this is suitable for sealed calcium technology batteries

Accepted Answer

Surely a sealed lead acid and a sealed calcium battery are of similar type when it comes to charging. The reason you have different charging modes on a charge controller is so that the charger knows the peak and low charge levels. This is so that the controller doesn't run a lead acid battery below 40% or so. Lithium you can deplete 100% of the charge and you will not damage the battery. Lead acid has what we call a memory in the chemistry world. Basically the electrons cannot be be packed tightly together in the lead acid mixture. It fives off an effect that the battery wont hold as much charge anymore after being discharged 100%. Long answer but I would say this will work on a sealed calcium battery as they are the same as a lead acid battery.

Question 3

Can I set the mximum battery voldtage at which the charger stops receiving amps? How? Thanks

Accepted Answer

Sorry....
Just as a "PS" to this....
I'm wondering what you are trying to " manage" ???? 
in 99.9% of all cases, your leisure battery's will always be 12 volt....therefore, your question should have more been about wattage, rather then voltage perhaps  ??
Regards Dee......

Question 4

can I connect 24v ( 2 x 100watt 12v in series) panels to this controller, and still have it charge a 12v battery bank?

Accepted Answer

Maybe you did it and it worked maybe it didn’t however choosing the correct solar charge controller is more than just the wattage of the panels and the voltage of the battery bank

The person that commented about the voltage being higher than 12v is correct in that and it will be however they are absolutely wrong saying that you need to have 12v coming out of your panels to charge your batteries using these charge controllers

ASIN	B01MSYGZGI
Best Sellers Rank	5,620 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 4 in Solar & Wind Energy MPPT Controllers
Brand	Renogy
Colour	Black
Country Of Origin	China
Customer Reviews	4.4 4.4 out of 5 stars (1,440)
Display Type	LCD
Global Trade Identification Number	00816360024651
Included Components	Charge Controller and Bluetooth
Item Dimensions L x W x H	17.3L x 7.2W x 23.8H centimetres
Item Weight	1.1 Kilograms
Manufacturer	Renogy
Manufacturer Part Number	RNG-CTRL-RVR40-BT-FBA
Material	Plastic
Model Number	RNG-CTRL-RVR40
Number of Items	1
Number of Packs	1
UPC	810009719328 816360024651
Unit Count	1.0 count
Voltage	12 Volts (DC)

Renogy 40A 12/24V MPPT Solar Charge Controller Bluetooth Solar Charge Controller with LCD Screen for AGM, Gel and Lithium Batteries

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