I did a full review here on my AC30 with solar charging specs.
Summary…I tested charging with four solar panels and all four charged just fine. The most interesting thing is that the charging voltage on all four was almost an identical 14.74 volts.
I tested with:
Jackery Solar 60
Acopower 120 watt
Paxcess 120 watt
Late in the day with total clouds and poor solar charging conditions. I will check again on a few when I have full sun just to make sure the voltage stays below 15 and continues to charge. Below is the text of the solar panel portion of my review with numbers on each panel:
Below are my individual results for each panel . The day was very cloudy and 4:30 in the afternoon with low sun. Bad solar conditions, but I was mainly wanting to verify charging with each panel. The watts achieved cannot be used for a solar efficiency comparison because the sun was rapidly changing due to cloud cover.
Bluetti 120 watt folding …
I bought four but did not have them on hand to test with my AC30. When I tested them on my AC200 they ran very well, had great power output and are ruggedly built of high quality materials. I recommend them for the AC30, 50 or AC200 as a panel that works on everything. Since an MC4 to 7909 adapter cable is not included with the AC30, it would have to be purchased separately. These panels can be connected in pairs or even more for the AC200 series. At the time of this review they are available on the Bluetti website for $309.99 on sale.
Paxcess 120 watt folding ……22.81 VOC…13.74 Volts under load…36.01 watts
*(I would recommend this panel for the AC30 and AC50 Bluetti because it comes with a multi connector cable that will connect directly to the 7909 input port of the Bluetti. It is a fairly low cost panel and is well build. It does NOT have MC4 connections though so this should be considered in a single panel configuration only.
Acopower 120 watt folding ……23.96 VOC…13.74 Volts under load…35.3 watts
This panel works very well and is thin and light. It is more costly and if using for an AC30 or 50, I think the better bang for the buck is the Paxcess above. It does come with MC4 connections and can be connected with multiple panels if needed for increased output. This is a feature that the Paxcess cannot duplicate
Jackery Solar Saga 60 ……26.28 VOC…13.53 Volts under load…15.4 watts
The Jackery solar saga panel cable terminates with a male 7909 connector which mates directly to the Bluetti AC30 and 50. The Jackery panels are very easy set up and built well. They are pricey but work well. They cannot be connected in pairs without purchasing additional costly adapter cables but it is do-able.
Aiper 160 watt folding …24.01 VOC…13.76 Volts under load…30.5 watts (very weak sun)
The Aiper 160 is a recent panel for me and I recommend it if you can find them for the $199 I paid. This will give you a single panel with a rated 160 watts. The panel has a cable that is removeable and begins with and XT60 connection and terminates with a 5525 male plug. Several adapters that will connect to the AC30 or 50. I personally made a 10 foot XT60 to MC4 cable so I can connect it to anything.
One interesting thing with the voltage under load is most panels were outputting around 13.75 volts. Almost too much of a coincidence. I think that has to due with the AC30 charge regulation. Not sure why the Jackery was lower unless it was due to it being a much smaller panel