The Short Version
ChargeCompared is a research and aggregation site, not a destructive testing lab. We do not have a watt-meter rack, a thermal chamber, or a 240V test bench in a rented warehouse. What we do is verify the things you cannot see on a product listing: actual amperage versus advertised amperage, NACS versus J1772 compatibility versus what the manual claims, smart-feature reality versus marketing copy, and how the charger behaves at the 12-month and 24-month mark according to verified-buyer reviews. Our work compresses 6 to 12 hours of manufacturer-site-and-owner-forum digging into a single comparison.
1. Topic Selection
Topics are picked from Google Trends rising queries in the EV-charging category, /r/evcharging and /r/electricvehicles weekly discussion threads, and Amazon Best Sellers Rank changes in the EV charger category. A new comparison ships only when we can find at least 6 candidate chargers with 4.3+ stars and 250+ verified buyer reviews each. If we cannot find that many credible options, the topic gets deferred or split.
2. Spec Verification
We cross-check every advertised amperage rating against the manufacturer's installation manual. Many chargers advertise 'up to 48A' but the manual reveals the unit ships with 40A dip-switches by default. We verify the NACS or J1772 connector and the included adapter situation. We confirm UL listing (UL 2594 for charging equipment, UL 2231 for personnel-protection circuits) by manufacturer name on the UL Online Certifications Directory.
3. Price Verification (Weekly, Automated)
An automated daily refresh script (current implementation: GitHub Actions workflow) loads the live Amazon product page and reads the live buybox price for every product on the site. When a price moves more than 15 percent, we open the article and update both the headline price and any text references to it. The script also flags out-of-stock and unavailable units so we can swap them for an equivalent. Our prices reflect the most recent automated check, dated at the bottom of each article.
4. Owner-Feedback Aggregation
This is the substitute for hands-on testing. Our research process reads the top 50 verified-purchase reviews per charger plus active threads on /r/evcharging, /r/teslamotors, and EV-specific owner forums. We look for recurring themes that appear in 3 or more independent reports: cord stiffness in cold weather, app reliability past 12 months, smart scheduling actually working with utility off-peak rates, GFCI tripping behavior, hardwire-versus-plug install differences, and warranty experience. Single-incident complaints do not make the article.
5. Installation Reality Check
Most home chargers can be either hardwired or plugged into a NEMA 14-50. We check what the manufacturer actually allows (some void warranty when plugged via NEMA 14-50 above 32A continuous), what most owners report doing, and what a licensed electrician would typically charge in 2026 dollars for a new dedicated circuit. The federal Section 30C tax credit at 30 percent up to $1,000 is factored into our 'true cost' analysis.
6. Editorial Audit Before Publishing
Every article passes an automated audit: zero em dashes, zero AI-content-tell phrases from a maintained block list, every affiliate link uses our Amazon Associates tag chargecomp-20 with rel="nofollow noopener sponsored", FTC disclosure appears above the fold, byline links to a verified author page with external identity confirmations, and JSON-LD schema (Article, FAQ, BreadcrumbList, ItemList, Product where applicable) validates against Schema.org definitions.
What We Don't Do
We do not claim hands-on testing. If you see a charger article on the site claiming 'we measured 49.2A on a Kill-A-Watt clamp', that is a mistake to flag, not a feature. We do not own every charger we cover. Our recommendations are derived from manufacturer specs cross-checked against verified-purchase reviews, UL certification rosters, and the experience reports of long-time EV owners on public forums. We also do not accept manufacturer sponsorships or free review units, and we do not run paid placements in our comparisons. The only revenue source is Amazon affiliate commissions, which are unaffected by which product you choose.
Corrections
Email corrections via the contact form. Spec errors, broken Amazon links, products that should be added or removed, prices that look stale: all welcome. Real email, real replies, usually within 48 hours.