Opting to race in Extreme E has come ahead of plans for the World Endurance Championship and Formula E, but highlights McLaren's more stable financial footing.
"One hundred per cent our financial situation at McLaren Racing is extremely strong," confirmed Brown.
"Of course, we have to be diligent and get a return on investment anywhere we're spending money, whether that's entering a new racing series or funding a new windtunnel, but yes, we are financially very healthy.
"That's allowing us our competitiveness in Formula 1, it's allowed us to look into IndyCar and allowed us to enter into Extreme E because what we will never do is distract or detract from our Formula 1 efforts.
"IndyCar or Extreme E, they are there to be complementary and to help accelerate our Formula 1 effort.
"As an example, Arrow Electronics, our title partner in IndyCar is now a big partner in our Formula 1 team.
"The strength of McLaren Racing is very good, and it's very exciting times here."
Asked as to when he anticipated a positive financial return from Extreme E, Brown added: "I'm anticipating this racing series to be commercially positive in its first season."
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