I am still using those old Dynamote Brutus Inverters, mine have the Dynamote name on the front panel but do have the Vanner name on the back. Way back then I was a communications tech with General Electric and saw quite a few of those Brutus and Vanner Dynamic Inverters in the L.A. county fire truchs and quite a few Ambulances as well, They were true tanks that always worked when needed the most.
Unfair comparison, When my water level in my deep well drops down below -320 feet my MagnaSine MS4024AE stumbles starting the pump but the Brutus starts it with ease.....(using a Trace autotransformer)
MagnaSine MS4024AE 4000 watts 120/240 surge capacity 5,800 watts
Brutus TB 32-24 3200 watts 120 volt only surge capacity 11,900 watts
The MagnaSine is a heavy brute but Brutus out weighs it by 20 pounds.