Choosing the best powerline networking adapter is no easy task. They have many optional capabilities, including outlet pass-through, antennas to repeat or extend Wi-Fi signals and multiple Ethernet ports, with more on the way. How can you find the one that performs the best?
We decided to test the fastest single-purpose powerline networking adapters to see what speeds are achievable when vendors focus on nothing other than optimal powerline throughput.
In reviewing the best sellers for powerline network adapters on Amazon, we chose the following vendors, which marketed powerline adapters in the 500 Mp/s and up range: D-Link, TP-Link, TRENDnet and ZyXEL. Many of the companies we spoke to advised us that they were working on updated versions of these adapters to meet the HomePlug AV2 specification, and that the new versions would be released this year. Should today's review postdate some of those launches, consider the results as a baseline to which the newer powerline adapters can be compared. Let's see how our chosen few line up along technical specifications.
A Note About Standards
Before we jump to discussing each powerline network adapter, I have to rant a bit about the HomePlug AV2 standard and a consumer's ability to verify that the product is certified. If you haven't read about the process, check out the HomePlug Alliance Certification process in our How We Test Powerline Network Adapters piece. Understandably, the HomePlug Alliance is very choosy about how vendors display the HomePlug Alliance Certification Mark as well as when it can be displayed.
The primary way to verify that a product is HomePlug Certified is to look for the HomePlug logo. Allegedly for consumer convenience, the HomePlug Alliance also provides a list of Home Plug Certified Products. Great! It's time to search. Admittedly, I'm biased in my desire for easy-to-access results, but let's take a look at an example using the first product in our round-up, D-Link's DHP-600AV. If you visit the list, you're informed that there are currently 180 products on it. How do we search for the DHP-600AV? Well, we can't enter the model number as a search term because that option isn’t available. Hmm…
What if we apply one of the category filter options (think tagged content) and select HomePlug AV2? As of this writing, that returns only four results?? That seems low, right? D-Link does have a product listed in the results, but it's not the DHP-600AV. OK, maybe it hasn't yet received HomePlug AV2 certification. Let's see if the results are different when we apply the HomePlug AV filter option. Nine pages of results look promising, but I don't want to have to scroll through nine pages, so is there a sorting option? Nope! Paging through nine clicks later, I find no mention of the DHP-600AV.
As a last-ditch effort, I try the site-wide search option. No luck. Just to eliminate my possible misunderstanding of how the product may be listed, I go back to those four pages of HomePlug AV2 products to copy an entry. I copy the product entry, throw the term in the search field and hope. Here, too, we reach a wall as no results come back.
What I learned from this experience is that it seems the only way I can verify if a product is certified according to the most recent HomePlug AV standard is to trust the vendor, look for the logo or request a copy of the letter of certification. <end rant>
So, why is being able to verify a product important? In this case, it lets us more easily sift through powerline adapters we know meet the standard versus others that may implement HomePlug AV in a slightly different manner. Using powerline adapters from the same vendor in that case wouldn't necessarily be an issue as long as they were purchased in the same relative time period. This is because we could assume the vendor would implement the standard similarly in those models. The key issue on that front then is continued interoperability as we continue to add more devices and accessories.
The deeper aspect is that vendors may market the technology behind the standard, rather than how the product is actually compliant with or certified to that standard. We'll discuss later if that could potentially have an effect on performance.
First up in our review, we take a look at the D-Link DHP-600AV.