Every specialist course can be bought while it is still in production — at about half its launch price (the exact discount sits on every price panel before you pay), with the planned completion date stated before you pay, and a full refund available at any moment until the course is released.
Early bird exists only while a course is unfinished. On release it moves to full price — though a deadline already printed on a price panel is honoured through its date, so a course that releases mid-window keeps its early-bird price until that day. After that the offer is simply gone. Each price panel shows its own end date; that date is the only thing there is to miss.
Enrolling before release means trusting the content on the strength of what is already published here. That trust deserves the lowest price this catalogue offers — half the launch price for your region, locked at purchase. No later public promotion goes lower: the early bird is the deepest level in the pricebook.
Early-bird students are in the room while the course is still being recorded. Your questions and feedback arrive in time to change lessons, not after they are frozen — so the course you helped shape is better, for you and for everyone after you.
The specializations are produced in parallel, and early-bird enrolments are the clearest signal of what to finish first. Buying early is a vote: the courses people have already paid for move to the front of the production queue.
Deep-dive engineering training is usually priced for corporate training budgets. Early bird puts each specialization within reach of one person paying for their own development — which is exactly who these courses are for. Why the prices can work this way.
Any time before the course releases, one email to sergey@bess.courses returns the full amount. Not a credit, not a partial refund — everything back.
The refund right runs until actual release, not until the originally stated date. If production runs long, you decide: keep the early-bird price, or take the money back.
The stage each course is really at is on the cards below, and the curriculum you are buying is published in full on each course page before checkout ever opens. Some of it can still change as the course is finished.
Sergey Syrvachev writes and records every course — the same person, start to finish, with no ghostwriters and no rotating instructors. The released Complete Guide stands at 2,500+ students and 4.6/5 from 500+ public Udemy ratings — and you can check both: what buyers wrote about it, and the released course itself.
What early bird is not: it is not early access. The course arrives complete, not as a drip of unfinished sections — until it is finished, the honest offer is the discount and the exit, not a preview.
Full descriptions and curricula are on each course page — along with the early-bird price, the planned completion date and the platform.
How a Battery Gets Paid has already released — a released course leaves this list, and the early-bird deadline printed on its price panel is honoured through its date.
The engineering layer: DC and AC fundamentals, the battery operating window, degradation and efficiency.
Course page & full curriculumUL 9540A and NFPA 855, thermal runaway, explosion protection, hazard analysis and four incidents.
Course page & full curriculumCapacity, RTE and availability guarantees; LTSA and O&M scopes; and the tests that protect operation.
Course page & full curriculumEvery in-production course is selling at its early-bird price right now — buy on the course page, refundable in full until release.
One email to sergey@bess.courses at any time before the course is released — you get the full amount back, no questions, no forms. After release the course is delivered to your account and normal purchase terms take over.
The bundle carries its own term instead: a full refund on the whole bundle any time until September 30, 2026, whether or not each course inside it has been released. The mechanism is the same — one email to sergey@bess.courses, no questions and no forms.
Your refund right does not expire with the original date — it runs until the course actually releases. If a date moves, you choose: keep your seat at the early-bird price, or take the full refund. A moving deadline never locks your money.
The complete course, delivered when production finishes — at about half its launch price, locked in at the exact amount the price panel shows when you buy. The course arrives complete, not as a drip of unfinished sections.
Every specialist course sells on bess.courses and streams in your classroom at learn.bess.courses — each course page confirms it. The released Complete Guide runs on Udemy today; each specialist course names its platform on its own page.
No. The Complete Guide is already released and enrols on Udemy at its regular pricing. Early bird exists only for courses still in production.
Per course — and for every course sold here it is already open: buy directly on the course page. Any future course will announce its opening the same way.
Early-bird checkout is open. Each course page carries its price, its planned completion date and its platform.