Adding 3 step charging to desi ups. Possible?

Is it possible to add 3 step charging to desi UPS? I mean if we can somehow use the charge controller (used for solar setup) to add 3 step charging to the desi UPS?

then you better just use the charge controller alone with plenty of solar panels.. and turn of ups charging.. solar controller will efficiently charge your batteries and prolong their life.

using both will fry your batteries.. desi ups dont work well with anything .

you can't use Solar charger without the solar panel ( or wind and hydro for the models which support wind and hydro) ..

I'm using Solar charger along with Desi UPS, quite successfully. so is this guy who is an engineer http://www.my-diysolarwind.blogspot.com/2012/07/end-of-episode-1.html

and http://www.my-diysolarwind.blogspot.com/2012/07/improved-wiring.html

Adding charge controller with panel should not harm batteries at all.

Just for info, the chargers work by usually sensing voltages. Desi UPS usually stops charging around 29VDC for 24V system. so if the solar charge controller is charging and voltage go that level, desi will stop charging but charge controller will FLOAT charge it.

Only disadvantage that you may not get full benefit from solar charge controller.

You can adjust desi to stop a bit earlier and solar charge controller to carry on the rest of charge.

But bottom line, they will work fine and may be you get better electricity backup time all the day but you are not going to get much even spending good amount of money.

[quote=“tufail_74, post:4, topic:21405”]

Adding charge controller with panel should not harm batteries at all.

Just for info, the chargers work by usually sensing voltages. Desi UPS usually stops charging around 29VDC for 24V system. so if the solar charge controller is charging and voltage go that level, desi will stop charging but charge controller will FLOAT charge it.

Only disadvantage that you may not get full benefit from solar charge controller.

You can adjust desi to stop a bit earlier and solar charge controller to carry on the rest of charge.

But bottom line, they will work fine and may be you get better electricity backup time all the day but you are not going to get much even spending good amount of money.

[/quote]

you can adjust both cut-off voltage and current in desi UPS.

[quote=“yousaf465, post:5, topic:21405”]

you can adjust both cut-off voltage and current in desi UPS.

[/quote]

Yes that is true but the charging curve of charge controller is always better than desi ups so use desi one to bringing to a good level so that charge controller can charge batteries properly. Like this, the life of battery will be batter.

Yes. If you can re-program the microcontroller installed in the kit.

Aurangzeb

[quote=“aurangzebhaque, post:7, topic:21405”]

Yes. If you can re-program the microcontroller installed in the kit.

Aurangzeb

[/quote]

there are variable resistor on circuit board of some desi UPS for adjusting cut-off.

Thankyou all for replies.

What if we feed the 12 volt output from the UPS to the charge controller directly like below

UPS CHARGER 12 V output =======> Charge Controller =======> Batteries

Can we use this setup?

or is it less expansive to add another 3 step charger to the batteries and limit the current and the cutoff voltage to the batteries that the desi UPS supplies so that the UPS gives only the bulk charge and the 3 step charger gets to give the float charge

[quote=“generaluser, post:9, topic:21405”]

Thankyou all for replies.

What if we feed the 12 volt output from the UPS to the charge controller directly like below

UPS CHARGER 12 V output =======> Charge Controller =======> Batteries

Can we use this setup?

or is it less expansive to add another 3 step charger to the batteries and limit the current and the cutoff voltage to the batteries that the desi UPS supplies so that the UPS gives only the bulk charge and the 3 step charger gets to give the float charge

[/quote]

Don't try to get apples from the vegetable basket. Use things for the purpose they are made for.

[quote=“generaluser, post:9, topic:21405”]

Thankyou all for replies.

What if we feed the 12 volt output from the UPS to the charge controller directly like below

UPS CHARGER 12 V output =======> Charge Controller =======> Batteries

Can we use this setup?

or is it less expansive to add another 3 step charger to the batteries and limit the current and the cutoff voltage to the batteries that the desi UPS supplies so that the UPS gives only the bulk charge and the 3 step charger gets to give the float charge

[/quote]

No you can't. UPS will not get the proper battery voltage and Charge controller will not get the proper input voltage