Grizzl-E Ultimate ULTRA Review: The 48 A Smart EV Charger Built in Canada
Grizzl-E Ultimate ULTRA review: 48 A / 11.5 kW Level 2 EV charger, native Wi-Fi app, IP67 die-cast aluminum, 24-ft cable. Where it beats ChargePoint Home Flex on durability + speed.
The Grizzl-E Ultimate ULTRA is what happens when Grizzl-E takes their industrial-grade aluminum chassis, bumps it to 48 A output, and finally adds the Wi-Fi app the base Ultimate didn’t have. The result is the only Level 2 EV charger that pairs die-cast aluminum IP67 hardware with native smart-app scheduling — and one of the only 48 A chargers that adds usable miles of range per hour over the 40 A standard.
This review covers where the ULTRA wins on hardware durability and charging speed, where the ChargePoint Home Flex wins on price and app maturity, and whether the $350 premium is worth it for outdoor or cold-climate installs.
What it is, in one sentence
A 48 A / 11.5 kW Level 2 EV charger in a die-cast aluminum IP67 housing with a 24-foot cable, native Wi-Fi app, Energy Star certification, and a 3-year warranty — built in Canada.
Specifications
| Spec | Ultimate ULTRA Grizzl-E, $1,099 |
|---|---|
| Maximum output | 48 A / 11.5 kW |
| Adjustable amperage | 16, 24, 32, 40, 48 A (via app) |
| Voltage | 208-240 V AC, single phase |
| Connector standard | J1772 (standard); J3400/NACS variant for Tesla |
| Connection type | NEMA 14-50 plug (or hardwire for 60 A circuit) |
| Cable length | 24 ft |
| Enclosure rating | IP67 (submersible to 1 m for 30 min) |
| Housing material | Die-cast aluminum |
| Operating temperature | -22°F to 122°F |
| Charging speed (typical EV) | ~37 miles of range per hour |
| Wi-Fi / app | Yes — native, scheduling, history, monitoring |
| Energy Star certified | Yes |
| Weight | ~17 lb (7.7 kg) |
| Dimensions | 11.5 × 7.5 × 4.2 in |
| Warranty | 3 years |
| Country of manufacture | Canada |
Where it wins
48 A / 11.5 kW — 20% faster than 40 A competitors
The Ultimate ULTRA delivers 48 A / 11.5 kW on a 60 A circuit. The standard Grizzl-E Ultimate, ChargePoint Home Flex (40 A mode), JuiceBox 40, and Wallbox Pulsar Plus all cap at 40 A / 9.6 kW. That 20% speed advantage translates to about 37 miles of EV range added per hour vs 30 miles at 40 A. For owners of high-capacity-battery EVs (Ford F-150 Lightning ER, Rivian R1S, Lucid Air) doing many highway trips, the extra throughput is meaningful. The ChargePoint Home Flex can match 50 A / 12 kW only if installed on a 60 A circuit — comparable speed, different brand trade-offs.
Die-cast aluminum + IP67 — built for outdoor
The ULTRA’s housing is solid die-cast aluminum, not plastic. For EV chargers installed on exterior walls in cold climates (or hot ones), aluminum dissipates heat better than plastic, doesn’t crack from UV exposure, and survives impact from snow shovels, lawn equipment, and the occasional bumper tap. IP67 rating means full immersion resistance — a hose-down won’t damage it.
If you live somewhere with -20°F winters or 110°F summers, the ULTRA’s mechanical durability is a real edge over the ChargePoint Home Flex (IP55-rated plastic housing).
Native Wi-Fi app with scheduling and history
The ULTRA’s biggest difference from the base Grizzl-E Ultimate is the native Wi-Fi app. Schedule charging windows (charge only 11 PM to 7 AM during off-peak rates), set daily charge limits, view monthly energy and cost history, and receive notifications when charging completes. For utility rates where peak is $0.30+/kWh and off-peak is $0.10/kWh, this functionality saves $200-$500/year for a typical EV owner.
The Grizzl-E app is newer and less feature-rich than ChargePoint’s (which has 5+ years of polish), but the essentials work cleanly: scheduling, monitoring, charge history.
24-foot Energy Cable
The ULTRA ships with a 24-foot J1772 cable. The ChargePoint Home Flex offers 23 ft. The JuiceBox 40 offers 25 ft. Grizzl-E’s “Energy Cable” is also thicker insulation and more flexible at low temperatures than ChargePoint’s — below 0°F, ChargePoint’s cable stiffens noticeably; Grizzl-E’s stays manageable.
Energy Star certified + utility rebate eligible
The ULTRA is Energy Star certified, qualifying for utility rebates of $200-$500 in many states (PG&E, ConEd, Xcel) and federal tax-credit programs. With a $400 utility rebate, the effective cost drops to roughly $699 — close to ChargePoint Home Flex pricing without the rebate.
Tesla NACS variant available
Grizzl-E sells the ULTRA in a J3400/NACS connector variant that plugs directly into Tesla vehicles (and Ford/GM/Rivian 2025+ NACS-equipped EVs) without an adapter. The Home Flex is J1772-only — Tesla owners need the included Tesla J1772 adapter for every charge. For Tesla-primary households, the NACS ULTRA eliminates one step from every charging session.
Where it loses
$1,099 MSRP is $350 over ChargePoint Home Flex
The ULTRA’s MSRP is $1,099 (street ~$899). The ChargePoint Home Flex MSRP is $749 (street ~$649). For buyers in mild climates with indoor garage installs and no preference for aluminum hardware, the $350 premium is real money. Utility rebates can close most of that gap; without them, the ULTRA needs to justify itself on durability, charging speed, or NACS support.
Requires a 60 A circuit for full 48 A output
48 A output requires a 60 A breaker on a dedicated circuit (NEC 80% derating rule). If your panel only supports a 50 A circuit, dial the ULTRA back to 40 A via the app — at which point you’ve paid premium for output you can’t use. Confirm panel headroom before purchase.
~17 lb housing is heavy to install
The aluminum housing makes the ULTRA about 17 lb — roughly 2× the weight of comparable plastic chargers (ChargePoint Home Flex at ~8 lb). Wall mounting requires anchoring into a stud or using heavy-duty drywall anchors. One-time consideration, but the install process is slower than lighter chargers.
App ecosystem is newer than ChargePoint’s
ChargePoint’s app has 5+ years of public-network integration, scheduling polish, and utility-partnership integrations. Grizzl-E’s app is solid for personal home use but lacks the public-network discovery and integration ChargePoint owners take for granted on the road. For home-only charging, the gap doesn’t matter; for road-trip planning that includes home + public charging, ChargePoint is the more cohesive ecosystem.
Grizzl-E Ultimate ULTRA vs the alternatives
| Spec | Ultimate ULTRA Grizzl-E, $1,099 | Home Flex ChargePoint, $749 | Pulsar Plus Wallbox, $649 |
|---|---|---|---|
| Max output | 48 A / 11.5 kW | 50 A / 12 kW (on 60A circuit) | 40 A / 9.6 kW |
| Housing material | Die-cast aluminum | Plastic | Plastic |
| Enclosure rating | IP67 | NEMA 3R (~IP55) | IP54 |
| Cable length | 24 ft | 23 ft | 25 ft |
| Wi-Fi / app | Yes (native) | Yes (native, mature) | Yes (native) |
| Scheduling | In-app + via EV | In-app + via EV | In-app + via EV |
| Energy Star certified | Yes | Yes | Yes |
| NACS / Tesla direct | Yes (J3400 variant) | No (adapter needed) | No (adapter needed) |
| Made in | Canada | USA / Mexico | Spain |
| Warranty | 3 yrs | 3 yrs | 3 yrs |
| Street price | ~$899 | ~$649 | ~$499 |
Who should buy it
- Outdoor wall-mount installs in harsh climates (Canadian winters, desert summers, coastal salt air). Aluminum + IP67 + 48 A combination has no real competition.
- Owners of high-capacity-battery EVs (Ford F-150 Lightning ER, Rivian R1S/R1T, Lucid Air, Hummer EV) who benefit from the 48 A throughput on a 60 A circuit.
- Tesla-primary households wanting native NACS without an adapter every charge.
- Utility-rebate seekers in states with Energy Star incentives — a $400 rebate effectively prices the ULTRA at the ChargePoint Home Flex tier.
Who should skip it
- Indoor garage installs in mild climates where IP67 is overkill and 40 A charging is plenty. The ChargePoint Home Flex or Wallbox Pulsar Plus deliver similar capability for $350-$450 less.
- 50 A panel owners who can’t deliver 60 A circuits. Dialed back to 40 A, the ULTRA loses its key spec advantage.
- Road-trip-heavy users who rely on the ChargePoint public network app integration.
- Budget buyers willing to skip Wi-Fi entirely — the standard 40 A Grizzl-E Ultimate (no Wi-Fi) is $200 cheaper if the Smart features don’t matter.
Frequently asked questions
Grizzl-E Ultimate ULTRA FAQ
Does the Grizzl-E Ultimate ULTRA work with Tesla vehicles?
Yes. The standard ULTRA uses a J1772 connector, which works with all non-Tesla EVs. Tesla vehicles require the included Tesla J1772 adapter (shipped with every new Tesla). Alternatively, Grizzl-E sells the ULTRA in a J3400/NACS connector variant that plugs directly into Tesla and other NACS-equipped vehicles (Ford 2024+, GM 2025+, Rivian 2025+) without an adapter. For Tesla-primary households, the NACS variant eliminates the adapter step every charge.
Can I install the Grizzl-E Ultimate ULTRA myself?
The mounting is DIY-friendly if you already have a NEMA 14-50 outlet on a 50 A circuit. For the full 48 A output, you need a 60 A circuit hardwired — that requires a licensed electrician. Installing a 60 A circuit typically costs $600-$1,500 depending on panel proximity and main panel capacity (you may need a panel upgrade). Permits required in most US municipalities.
What's the difference between the Ultimate ULTRA and the standard Grizzl-E Ultimate?
Two changes: ULTRA bumps output from 40 A / 9.6 kW to 48 A / 11.5 kW, and ULTRA adds native Wi-Fi + Energy Star certification. The standard Ultimate ($895 MSRP) has no Wi-Fi, no app, no Energy Star, but caps at 40 A. Pick the ULTRA if you want smart features or have a 60 A circuit; pick the standard Ultimate if you want the simplest, hardware-only EVSE without any cloud dependency.
Can the ULTRA charge two EVs?
Not simultaneously. Each ULTRA charges one EV at a time. For two-EV households, install two ULTRA units on separate circuits, or use a load-sharing solution like ChargePoint Home Flex (which can share a 60 A circuit between two chargers via Wi-Fi coordination). Grizzl-E does not currently support load sharing across units.
How long does the Ultimate ULTRA last in real-world use?
Grizzl-E's warranty is 3 years, but field reports from earlier Grizzl-E units (the standard Ultimate launched in 2018) show units still working in 2026 with zero degradation. The aluminum housing means fewer environmental failure points than plastic competitors. Cable wear is the most common eventual failure — handle the cable gently in cold weather to avoid jacket cracking.
Bottom line
The Grizzl-E Ultimate ULTRA is the best 48 A smart EV charger for buyers who want durable hardware and modern smart features in one unit. The die-cast aluminum + IP67 + 48 A + native Wi-Fi combination has no exact competitor at this price point.
If you don’t need 48 A and live in a mild climate with an indoor install, the ChargePoint Home Flex does most of the same job at 40 A for $350 less. If you want maximum durability and don’t need Wi-Fi at all, the standard Grizzl-E Ultimate (no app) saves $200. For everyone with a 60 A circuit, harsh climate exposure, and the desire for Smart features without sacrificing build quality, the Ultimate ULTRA is the rational pick.
Editor’s rating: 4.7 / 5
Last reviewed: May 2026. Pricing accurate at last check; verify on merchant page.