With all the big names doing battery lawn machines and Honda getting out of the gas powered,they have them in the market in England and Australia, why not in the good old U.S.A?
I would suspect the following reasons:
1. Already small profit margins - Honda apparently doesn't make much on a gasoline powered mower where they have manufacturing facilities on American soil.
2. Cost cutting from other manufacturers - if profit margins are already slim on a HIGH quality product then you can be certain that the competition will win over most consumers because of price. Honda mowers today are already very pricey so if there is an apple to apples product (aka electric to electric) the consumer is LIKELY going to buy something they've seen on the market for a while at a lower price point.
3. Market share - There is no Honda electric mowers in North America now so for them to come to the game this late means they'll have an uphill battle to win over market share in an already saturated market.
4. Shareable platform and complimentary products - Most electric mower companies have complimentary products that work with their battery system. Milwaukee can use the batteries for their power tools, EGO can share between their mower and snowblower. I cannot see Honda changing their entire lineup for the sake of battery support. They may offer SOMETHING but I do not anticipate it being extensive nor cheap like brands from Yardworkds or Ryobi for example that for the most part, do an okay job for what they were designed for.
5. Customer preferences - the USA and north america as a whole, is likely slow to adopt battery powered anything. Cars have been relatively slow to adopt and the mindset that gasoline is better is still very strong.
6. Beliefs that long term, gasoline is more viable. I am a firm believer that batteries and their limited lifespan IS legitimately a problem we have yet to truly overcome so I'm sticking with gasoline as its been the mainstay and likely will be for a long time.