How the speed is achieved
Two mechanisms working together.
Proof of history
timestamps transactions before they reach consensus, so validators do not have to negotiate the ordering of events separately. Ordering is the expensive part of agreement in most blockchains, and settling it in advance removes a large amount of coordination.
Proof of stake
handles validation itself, with validators selected by the size of their stake.
The combination produces block times in the hundreds of milliseconds and throughput far above chains that order transactions during consensus.
The trade-off is hardware. Running a Solana validator requires substantially more powerful equipment than most networks, which concentrates validation among fewer participants. Whether that matters depends on what you value, and it is a real design choice rather than an oversight.
The outage history
This has to be said plainly, because it is the main thing a merchant should weigh.
Solana suffered several full network halts between 2021 and 2022, some lasting hours, caused by transaction floods and consensus failures. During an outage nothing settles, which for a payment network means the checkout stops working.
Stability has improved considerably since, and the network has run without comparable incidents for a long stretch. The record exists, and a business relying on a single network should know it exists.
Solana in payments
Where it fits is stablecoin transfers at scale. USDC runs natively on Solana with large volume, and the combination of sub-cent fees and sub-second settlement makes it the cheapest fast path for stablecoin payments currently available.
For small-ticket business this matters more than anywhere else. On a twenty-dollar order, a fee of a fraction of a cent is invisible; on Ethereum at a busy moment it is not.
Addresses use base58 encoding, run 32 to 44 characters and carry no prefix, which makes them visually distinct from Ethereum and TRON formats. That reduces one class of mistake.
What to set up before accepting SOL
Three practical points.
Decide whether you want SOL or stablecoins on Solana. These are different propositions. SOL carries price risk like any coin; USDC on Solana carries none while keeping the network’s speed and cost.
Check that your payout route supports the chain. Support has become broad, though a payout partner that credits USDC only on Ethereum will not help you here.
Set the confirmation threshold sensibly. Solana finalises fast enough that waiting adds nothing at retail sizes, and gateways generally handle this automatically.