DSSR20 with MPPT

[Greg Norman]

My camper has a 24V system with four 60-cell panels and two DSSR20. I updated the camper with a vent fan and air conditioner, which required me to remove two panels. 

I want to add some smaller panels. I want to keep DSSR20 for two 60 cell panels and add a small MPPT for new smaller panels. Is there any issue with doing this?

[Dacian Todea (electrodacus)]

No there should not be any issues in doing so. But what are the smaller panels you are considering ? If they are 30 cell panels then you can just connect those in series and connect to the DSSR20 so you do not need the expense of the MPPT.

[Greg Norman]

Thanks for the advice. I tried googling 30 cell panels and have not been able to find any. Where or how do I find them?

[Dacian Todea (electrodacus)]

You will be able to identify them by how the cells are arranges. If there are 3 rows of cells they will be 30, 33 or 36 cells and if they are 4 rows will be typical 32 or 36 cells.

Also you can identify them based on Vmp voltage that will be around 16V

I do not know what sort of panel exactly you look for but here is an example of a flexible panels with 30 cells https://www.ecoflow.com/ca/100w-flexible-solar-panel

And they have the same solar panel in rigid format that will last much longer https://www.ecoflow.com/ca/100w-rigid-solar-panel

[Greg Norman]

Will these work for my 24v system connecting in series and then to DSSR20? 

https://www.amazon.com/gp/product/B0C8H8NFBM/ref=ox_sc_act_title_1?smid=ATVPDKIKX0DER&th=1

[Dacian Todea (electrodacus)]

Yes it will work great.

You should be able to connect up to 6 panels 3 groups in parallel each made out of two panels in series.

[Greg Norman]

As always, thanks so much for your assistance!