I have an AC70 Power Station and the small PV120 solar panel. Can I add/daisy-chain the PV120 and a lager PV200 panel to boost the recharge the AC70? Or would I be better off just adding a second similar setup: an Elite100 and a PV200 panel? Or for that matter, a third option might be considered: adding just the Elite 100 might be the most cost-effective way to have more power available … who knows if a blackout would last long enough to need solar power that’s fairly slow to recharge?
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You can chain them together but you are safer going parallel with a y branch adapter and a MC4 inline diode on the positive lead to prevent backfeeding as current can only flow out the panel and TO the power station but not back. The reason you want to go parallel over series is the mismatching panel voltage/characteristics.
In parallel you’ll likely operate at a max of around 19V and 10A or 190W tops.
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From what I can tell, Bluetti has discontinued the PV120 and PV200, so unless you already have those, I would get something else. The newest and best solar tech is the N-type 16BB, or TOPCon.
I strongly suggest you read this article:
Mixing solar panels – Dos and Don’ts
The Secrets to Connecting Different Solar panels in Series or Parallel- The Definitive Guide
The solar input specs for the Bluetti AC70: 12V-58VDC, 10A, 500W Max
You might consider getting four of these ZoupW 100W panels so you can wire in 2S2P, which would give you pretty close to the 500W, or at least closer than most panels. That configuration also helps in partly cloudy or partly shaded conditions. Having four separate panels gives you more options than one large panel.
