What is the Amperage Information for etrailer MC4 Y-Branch Adapters?
Updated 01/27/2026 | Published 01/18/2026
Question:
What amperage are these rated at?
asked by: Robert
Expert Reply:
Hello Robert,
Sorry for the delay in getting back to you. I had to reach out to the right people since this information isn’t listed on the product page. Here’s what I found out:
The MC4 Y-Branch adapters # e92PR don’t have a specific amperage rating published because they’re designed as expansion branches for wiring solar panels in parallel, rather than as a current-limiting component on their own.
They’re intended for use with typical RV and residential solar panels, such as 100W to 195W panels, which usually produce around 5 to 11 amps per panel. In those applications, these adapters are more than capable of handling the electrical load.
In the solar industry, standard MC4 connectors and branch adapters like these are generally rated for around 30 amps DC per connector under normal conditions. As long as your wiring and charge controller are also sized for that current, using these adapters for two panels wired in parallel is well within their intended operating range.
What kind of set-up were you looking to use these with?
Product Page this Question was Asked From
etrailer MC4 Expansion Branches - Qty 2
- Accessories and Parts
- RV Solar Panels
- Cables and Connectors
- Expansion Kit
- Branches
- etrailer
more information >
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on Accessories and Parts
Ted G.
1/27/2026
The 2 to 1 4mm MC4 Y-Branch connectors listed on the Go Power spec sheet are rated at 50A / 1500 VDC. Be sure to obtain the special composite wrenches used to separate these connectors - they make it easy.