January 27, 20251 yr I am hoping someone can provide insights into this scenario or has experience doing something like this 😀. I have an existing Solar installation which includes 3 x Dyness BX51100 5.1kwh batteries connecting to a Deye 8Kw Inverter. The current battery configuration is not sufficient, and I now want to add additional batteries into the mix - there are multiple options, but I have questions/concerns, as follows: Question 1. Can one add "new" batteries (of the same make/size) to a 2-year-old installation? - the specs say you can have up to30 Dyness BX51100 batteries in parallel, but my question is how will the "new" batteries impact the older batteries (or vica versa) or is this not something one should be concerned about? Question 2. Do you have to add the same make/model/size battery into the mix - as an example, can I add a larger Dyness battery into the mix - In other words, can I connect a Dyness 14.3 kwh Power Brick to the existing 3 x Dyness BX51100 5.1 kwh batteries (connect them all in parallel)? Question 3: Can one connect different makes of batteries together (i.e. a Hubble to a Dyness or other)? I have been trying to do a search for an answer to these questions but cannot find anything of substance. Is there anyone with real world experience or insights? Thanks  Edited January 27, 20251 yr by Marcodp Corrected the wording
January 31, 20251 yr 1 - yes you can add new batteries to an older pack - Lithium is generally more forgiving of things like this and via the BMS it is able to manage the charge / discharge process of the different age batteries. 2 - If you want to keep battery comms (and potentially the warranty) then you have to use the same size, so another 5.12 battery. If you are more adventurous then you can use voltage settings and mix and match as needed. Ideally if your battery is setup in a 16 vs 15 pack config then you need to keep to that pack config so that voltages match 3 - See above as well - Dyness will likely void your warranty if you don't use comms and / or add a different brand because there is no unified way to manage how different batteries and BMSs charge and discharge
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