Having a grid backup agreement with Nissan and Mitsubishi is basically meaningless. Why this is true is in the last paragraph below so skip to there if the rest doesn't interest you.
Until the last year or two most electric vehicle and power storage batteries used the same ternary (Mn, Ni, & Co) anode batteries. Some of these were cylindrical batteries, some were pouch cell batteries, but they all used roughly the same chemistry.
The bad thing is that MNC ternary batteries use a flammable organic electrolyte, meaning they burn nicely if damaged or short circuited so that they overheat. Typically they also lose about 20% of their power storage capacity after around 800-1000 discharge/charge cycles. For a 300 km/200 mi range EV that is more than enough for over 10 years of use for most people. Power storage batteries also lose capacity with discharge/charge cycles but a greater loss of capacity is acceptable for that application.
Over the last two years or so lithium iron phosphate batteries that use a non-flammable electrolyte have become more popular for EVs, and especially for power storage batteries. These don't hold as much power as the ternary batteries or release that power as fast but importantly they aren't flammable and they can be discharged/charged 2-3 times as many times as the ternary batteries for the same amount of capacity loss.
The cost of electricity is less than the cost of gasoline/benzene to drive an ICE car a similar distance, especially if you charge it at home. EVs do need new brake pads, tires, and windshield washer fluid just like an ICE car, but they don't need oil changes, new spark plugs, etc. that ICE cars need so you save money on maintenance.
A myth is that lithium ion batteries are environmentally unfriendly since they can't be recycled. This is simply not true and there are already a number of companies that recycle lithium ion batteries with up to 98+% of the battery materials being recycled.
Something the article forgets to mention is that Japanese auto makers Nissan, Mitsubishi, Honda, and Toyota almost exclusively sell straight hybrid (HEV) and a small number of plug in hybrid cars (PHEV). HEVs and PHEVs give you better gas mileage than an ICE car, but you still have the maintenance costs of an ICE vehicle. The number of PEV sales by the Japanese auto makers is minuscule compared to Tesla or to a variety of PEV manufacturers from China, Europe, and Korea.