Both are 40-amp J1772 portables; the split is lowest price versus dual-level flexibility. Buy the MUSTARTfor the cheapest true Level 2 portable — 240-volt speed for the least money. Buy the WOLFBOX for a dual-level unit that ships with both a 240-volt and a 120-volt plug, so it also works from a standard outlet on the road.
These two cross-shop for the renter or traveler who wants portable charging without overspending. We compile published specs and owner reports and do the math here rather than bench-testing.
Speed
A tie at the top. Both deliver 40 amps / 9.6 kWon a 240-volt NEMA 14-50 outlet — the same ~25–30 miles of range per hour. The WOLFBOX adjusts down from 40 amps for weaker circuits; the MUSTART runs at its rated output. On 240 volts, speed does not separate them.
Plugs and flexibility
This is the real difference. The WOLFBOX ships with both a 240-volt (14-50) and a 120-volt (5-15) plug, so it doubles as a Level 1 trickle charger at any standard outlet — genuinely useful on a road trip. The MUSTART is 240-volt only. If you want one charger that covers both outlet types, the WOLFBOX; if you only ever use a 240-volt outlet, the MUSTART's simplicity is fine.
Cable and readout
The MUSTART has a shorter 21-foot cableand an LCD readout for status and faults; the WOLFBOX's adjustable current is its handier extra. Measure your run — 21 feet is fine for most single-bay setups but tight if the outlet is far from where you park.
Price and value
The MUSTART is one of the cheapest true 40-amp portables you can buy, and that is its whole pitch. The WOLFBOX costs a bit more for the dual-level flexibility and adjustable current. If the lowest price leads, the MUSTART; if you want the do-both traveler, the WOLFBOX.
The one-line split: the MUSTART is the cheapest 240-volt portable; the WOLFBOX adds a 120-volt plug and adjustable current for a bit more. Same top speed, different flexibility.
The verdict
Choose the MUSTART for the lowest-cost path to 240-volt portable charging. Choose the WOLFBOX if you want a dual-level unit that also works on a standard outlet and dials down for unfamiliar circuits. Both charge at the same 40-amp rate on 240 volts; see them in our portable roundup.
