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My current two rows of 4x170watt solar panels are connected to 2 pcs of 100/30 mppt solar chargers and they work in parallel. In addition to this system, is it possible to connect a 75/15 mppt charger to which 3x170 Watt panels are connected in parallel to the existing system?
You should also have the same setpoints (Voltage) programmed into each charger.
then when reaching full charge you do not need all 3 chargers to float.
i have set my two chargers like this both charge until the battery is almost full and one is set by 0.2 volt lower for float.
I connected Victron 12v 75/15 to 2 units of 12v 100/30 system running in parallel, there was no power increase. Unfortunately, the answers given were wrong.
if all your Victron Mppt controllers are smart with blue tooth you can network them to giver with VE smart network so sync changing and work as one all in bulk or ads - float at same time
It means that mppts of different power cannot run parallel to each other. This is Lesson one ? how so I have set up 75/15 with 100/20 mppt with 12v or 24v and 48v battery and larger too all that happenings all solar controller's on the network have charging sync and power out put is shown for hold solar controller group, each controller only proverbs power out put that it can base PV input just means that all the controls will be in one charger mode i.e. bulk or abs or float at same time work as one
Sorry, but let's kill the misconception above.
There is no reason that different MPPTs cannot be run in parallel to charge a single battery bank.
Each must have its own panels.
Each must be configured with identical parameters.
The battery must be capable of taking the increased output.
The monitoring system (if installed) must see the charge current from all controllers.
Usual rules for panels/controller/cable matching still apply.
If you didn't see an increase in output, either there's a cabling problem or one of the above applies.
Maybe, the 3 new panels, that are connected to the new MPPT, are wired in parallel and not series = Low input voltage. That could explain "no charging" from the new MPPT ???
If we're going to get anywhere with this, you must post the charger settings for each charger and the first graphic for each from Victron connect.
As long as each mppt has its own panels you can mix and match mppts in any environment.
Always use the mppt calculator to confirm the panels are the right fit for any mppt.
I connected Victron 12v 75/15 to 2 units of 12v 100/30 system running in parallel, there was no power increase. Unfortunately, the answers given were wrong.
You say: "When the 75/15 charging output is connected in series to 100/30,"
Hopefully this is not what you meant. The MPPTs should all be connected to the battery in the same way, not in series with each other.
Of course , I connected all mppt's to the Battery as paralell to the busbar connection , don't you ? Haha hahhhh
My dear Victron friends, now the system is working. 75/15 produces energy and feeds the system. It means that 2 x 100/30 and 1 x 75/15 can be connected together in parallel. It can work synchronized at the same time, feed the system and charge the batteries. The attached picture is proof of this. I would like to thank those who contributed with their comments.
