Good news: You don't have to buy expensive Zamp panels to have the benefit of solar.
The 120-watt Solar Panel Kit we recommend includes this adapter, so you can plug into the "Zamp only" port with no problems. (It's actually an industry standard solar port.)
If you are buying our 120-watt Solar Panel Kit, this adapter is already included.
However, if you have another brand of solar panels with Anderson-style connectors, or previously bought a Solar Kit before this adapter was available, you can add it to your system now.