


RTP
96.4%
Volatility
Medium/High
Max Win
10,000x
Tesla’s Invention is a medium/high-volatility online slot from Relax Gaming with an RTP of 96.41% and a maximum win of 10,000x.
Page updated July 2026
Tesla's Invention is a video slot from Relax Gaming that honours Serbian-American inventor Nikola Tesla, the pioneer behind alternating current power, rather than the modern car brand that shares his name. Players take on the role of collecting power-ups that charge up features such as multipliers and symbol upgrades, all set against a dramatically scored backdrop of a lightning-lashed workshop.
The audio design is a genuine highlight here - sweeping, dramatic music that suits the image of a driven scientist darting between levers and dials while storms rage outside. Set on a 6-reel, 5-row grid with a substantial 15,625 ways to win, the game's low-pay symbols are stylised cursive J-A card ranks, while four pieces of electrical equipment fill out the high-pay end of the table. Wilds can substitute for any regular paying symbol when they appear.
Tesla's Invention returns 96.41% RTP on standard play, rising slightly to 96.64% when buying directly into the free spins feature. Both figures sit above the typical market average, making this a mathematically favourable choice compared with a large chunk of the online slots field, regardless of which entry point you choose.
Rated medium to high volatility, Tesla's Invention rewards patience - wins won't necessarily come thick and fast, but the power-up collection system built into the free spins round is designed to build toward genuinely substantial payouts once enough charge has been gathered.
The maximum win on offer reaches a strong 10,000x the stake, giving the power-up-fuelled free spins round real bite once the multipliers and symbol upgrades stack up. Stakes run from $/€0.20 to $/€100 per spin, and the game is fully playable across desktop and mobile, with wins formed across its expansive 15,625-ways grid.
Tesla's Invention pairs a genuinely well-realised audio atmosphere with a solid, above-average RTP and a power-up system that gives the free spins round a satisfying sense of progression. The visuals may not quite match the ambition of the sound design, but the underlying maths and features hold their own. If collecting charge to supercharge a bonus round sounds appealing, try the free demo at johnessyslots to see how the power-ups build before spinning Tesla's Invention for real money.
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Tesla’s Invention has an RTP (return to player) of 96.41%. RTP is the theoretical percentage of total stakes a slot returns to players over a very large number of spins, as published by Relax Gaming — individual sessions can land far above or below it.
Tesla’s Invention is rated medium/high volatility. High-volatility slots pay out less often, but wins tend to be bigger when they land — expect longer dry spells and larger swings to your balance.
The advertised maximum win for Tesla’s Invention is 10,000x. Max wins are extremely rare by design — treat them as a ceiling, not an expectation.
Tesla’s Invention is developed by Relax Gaming and was released in Dec 03, 2023.
Verified Data via Johnessy AI