in 2026 requires a -capable operation whose revenue exceeds its real costs under uncertain prices and network competition. A hardware specification is a starting point, not a profitability guarantee.
Reviewed 18 September 2026. Hardware power figures and pool terms have been corrected. All revenue, electricity-price and solo-mining scenarios below are labelled assumptions rather than current earnings quotes.
Start with an exact hardware configuration
BITMAIN's L9 specification lists a 16 GH/s configuration at 3,360 W and 210 J/GH, measured under the manufacturer's stated conditions. The previous article's 3,200 W figure was not the correct specification for this configuration.
The manufacturer lists 220–277 V input and a 75 dBA noise figure under specified fan conditions. It also gives tolerances for actual and power. These details affect whether a proposed site can support the machine.
| Buying question | Evidence to obtain |
|---|---|
| Exact variant | Model, rated hashrate, power and voltage |
| Real purchase cost | Hardware, shipping, import charges and taxes |
| Condition | New or used, operating history and warranty |
| Site capacity | Electrical design, cooling, airflow and connectivity |
| Seller reliability | Contract, payment terms and verifiable support |
| Exit value | A conservative assumption, not a promised resale price |
This example is not a ranking or a statement that the L9 is always the best available purchase. Compare current quotes and exact configurations before committing capital.
Convert power into daily cost
At a constant 3.36 kW for 24 hours, the machine uses 80.64 kWh per day before additional cooling or other site loads.
Daily energy cost = kW × operating hours × price per kWh
| Assumed electricity price | Daily energy | Daily miner-only electricity cost |
|---|---|---|
| $0.05/kWh | 80.64 kWh | $4.032 |
| $0.10/kWh | 80.64 kWh | $8.064 |
| $0.15/kWh | 80.64 kWh | $12.096 |
| $0.20/kWh | 80.64 kWh | $16.128 |
Actual bills can include demand charges, taxes and other components. Measure wall power under the intended environment rather than assuming nameplate values describe every hour.
Nearly all consumed electrical energy ultimately becomes heat. Installation therefore needs appropriate electrical capacity and heat removal under local requirements; a household socket's existence does not establish suitability for continuous operation.
Model both LTC and merged-mining revenue
Compatible pools can distribute proceeds from Litecoin and Dogecoin mining. The split changes with prices, difficulty and pool policy. Dogecoin should not be treated as a fixed, negligible “bonus” when evaluating the operation.
The Litecoinpool help page describes its calculation and a nominal 2% fee at this review. It accounts for LTC and DOGE separately. The earlier claim of a permanent 0% fee and automatic conversion of all proceeds into LTC was outdated.
Read the actual pool terms for accepted shares, rejected work, payout thresholds, addresses and any fee changes. Pool share difficulty controls work accounting; it is not a way to manufacture more expected revenue from the same hashrate.
| Payout concept | Main economic distinction |
|---|---|
| PPS | Payments based on accepted work under the pool's formula |
| PPLNS | Payments depend on a defined share window and pool block outcomes |
| Transaction-fee allocation | Inclusion and distribution vary by scheme |
| Merged-mined assets | Eligible assets and payout currencies depend on the pool |
Scheme names alone do not establish the complete contract.
A transparent cash-margin example
Assume $15 daily gross combined revenue, a 2% pool deduction and $1 of other daily operating cost. Net revenue before power is $14.70; after the other operating cost it is $13.70.
| Assumed electricity price | Margin after the stated costs |
|---|---|
| $0.05/kWh | $9.668/day |
| $0.10/kWh | $5.636/day |
| $0.15/kWh | $1.604/day |
| $0.20/kWh | −$2.428/day |
These figures exclude capital recovery, taxes and financing. If a calculator's revenue estimate already deducts the pool fee, do not deduct it again.
At $6,000 capital cost and a constant $5.636 daily margin, simple is about 1,065 days. That is arithmetic under frozen assumptions, not a forecast. Difficulty, prices, downtime, failures and the next Litecoin halving can invalidate the assumed margin.
Use the mining ROI calculator to test adverse cases as well as the current snapshot. The halving guide explains why the LTC subsidy change does not halve all merged-mining revenue equally.
Solo mining: expected time is not a deadline
For illustration, assume a 16 GH/s miner and a constant Litecoin network rate of 2 PH/s, equal to 2,000,000 GH/s. The miner's share is 0.000008.
At 576 expected network per day, its expected rate is 0.004608 blocks per day, corresponding to a mean wait of about 217 days. Under a simplified Poisson model with unchanged conditions, the probability of finding no block in 365 days is about 18.6%.
Those are hypothetical network conditions, not a current hashrate report. A mean waiting time is not a scheduled payout. Costs continue during an unlucky period, which is a central difference between solo exposure and a pool's payout arrangement.
Operational records and monitoring
Record accepted hashrate, rejected shares, temperatures, wall energy and actual payouts. Compare pool-reported results with local hardware measurements over consistent periods.
Keep management interfaces off unrestricted public access. Use firmware from the manufacturer's verified distribution channel and maintain a documented recovery process. A hosted machine requires its own checks on ownership, , uptime obligations, maintenance charges and withdrawal or termination terms.
For accounting, preserve both LTC and DOGE receipts, conversions and expenses. Tax treatment differs across countries; the tax guide specifically warns against importing one jurisdiction's mining-deduction rules into another.
Download the calculation inputs and results (CSV). These are the stated protocol calculations and illustrative scenarios, not live market data.
Frequently asked questions
Is 3,360 W the power of every L9 variant?
No. It is the cited manufacturer's 16 GH/s configuration. Check the exact variant and operating conditions.
Does the halving cut the electricity bill in half?
No. The scheduled change affects Litecoin's subsidy, not the hardware's power demand.
Is simple payback a guaranteed return date?
No. It assumes a constant positive margin and ignores changes that can be substantial.
Does a 217-day mean solo wait promise a block by then?
No. It is an expectation under a hypothetical model, and actual waiting times can be much longer.
