Specifications and pool rules checked on September 25, 2026. Profitability examples below use hypothetical assumptions, not live earnings or purchase quotes.

Why "Most Profitable" Is Not a Fixed Ranking

Dogecoin mining rigs are frequently marketed with a single "most profitable" label, but profitability is not a static hardware attribute. It depends on the interaction of Scrypt ASIC efficiency, delivered hardware cost, local electricity pricing, cooling and site conditions, pool payment structure, and the combined value of Litecoin and merged-mining rewards. A machine with the lowest published energy consumption per unit of hashrate is not automatically the highest-return purchase if its price, availability, or operating environment changes. Among the models compared here, the SEALMINER DL1 Air has the lowest manufacturer-stated energy consumption per hash. Whether it delivers the highest daily profit or the fastest payback depends on revenue, purchase price, and deployment conditions. This article compares manufacturer-published specifications and uses a hypothetical profitability example to show how those conclusions can differ.

Dogecoin Mining Is Usually Litecoin/Dogecoin Merged Mining

Dogecoin uses the Scrypt hashing algorithm and supports AuxPoW, which allows a Scrypt ASIC to submit the same proof-of-work toward both a Litecoin block and a Dogecoin block simultaneously, rather than splitting hashrate between two separate jobs. In practice, this means a Dogecoin mining rig is commonly deployed as part of an LTC/DOGE merged-mining setup connected to a Litecoin-compatible pool, not as a DOGE-only device. Evaluating a rig purely on a DOGE-only revenue calculator can therefore misstate its actual return, since the miner also earns LTC block rewards and, depending on the pool, additional merged-mining coins from the same hashrate. See the Dogecoin mining guide for the underlying merged-mining mechanism.

Comparing Scrypt ASIC Efficiency: The Manufacturer Data

Energy efficiency for Scrypt ASICs is expressed in joules per unit of hashrate — J/GH or J/MH depending on the manufacturer. Since 1 GH/s equals 1,000 MH/s, a rating in J/MH can be converted to J/GH by multiplying by 1,000. The table below lists selected manufacturer-stated specifications for Scrypt ASICs relevant to LTC/DOGE merged mining. It is not an exhaustive market ranking.

Bitdeer announced the SEALMINER DL1 Air on March 16, 2026, specifying 25 GH/s at 3,725 W in normal mode, equal to 149 J/GH, with a low-power mode reaching up to 20.5 GH/s at 136 J/GH (Bitdeer investor announcement). Based on these figures, it is the most energy-efficient Scrypt ASIC identified in this comparison — in normal mode, its stated energy consumption per hash is approximately 29% lower than the Antminer L9's published 210 J/GH and 22% lower than the ElphaPex DG2+'s converted 190 J/GH. Bitdeer states that DL1 performance may vary by ±5% in hashrate and efficiency and ±10% in power consumption, with final specifications based on delivered units. Bitmain's own specification sheet for the L9 notes that hashrate may vary by roughly ±3% and that power draw and efficiency may vary by roughly ±5% under real operating conditions, so field results for any Scrypt ASIC should be measured rather than assumed from a data sheet (Bitmain L9 specifications). The L9 also requires 220–277V single-phase AC input and has a stated noise level of 75 dBA at 25°C, both of which affect site planning independently of its efficiency rating. ElphaPex's current Scrypt lineup, including the DG2+, DG2, and the smaller DG Home 1, is listed with specifications on the manufacturer's product page (ElphaPex Scrypt miners).

Availability checked September 25, 2026: ElphaPex lists the DG2+ and DG2 as “Futures” and the DG Home 1 as “SPOT.” These labels do not establish a guaranteed delivery date. DL1 Air and L9 delivery schedules were not verified for this comparison. Confirm the specific batch, delivery date, and delivered price before estimating when mining income can begin.

The DG Home 1's lower absolute power draw (630 W) can simplify electrical planning for a single unit, but its stated 300 J/GH is materially less efficient than the other models in this table. A lower power requirement is a deployment convenience, not evidence of higher profitability.

Electricity Cost: A Worked Example

Energy efficiency translates into an operating cost once a local electricity rate is applied. Daily electricity cost is calculated as:

Daily electricity cost = (power draw in watts ÷ 1,000) × 24 × electricity price per kWh

Using an illustrative rate of $0.10/kWh — not a universal figure, since rates vary widely by region and hosting arrangement — the SEALMINER DL1 Air's 3,725 W draw consumes 89.4 kWh per day, or $8.94 in electricity, while the Antminer L9's 3,360 W draw consumes 80.64 kWh per day, or $8.06. The L9 has a lower daily electricity cost in absolute dollars, but it also delivers less hashrate. Energy cost per unit of hashrate is useful for comparing electrical efficiency. To compare daily profit per machine, however, subtract the machine's full daily operating costs from its daily mining revenue; J/GH alone does not determine that result. These figures cover electricity only; they exclude pool fees, hosting fees, cooling, maintenance, downtime, shipping, and the hardware's purchase price.

Building a Complete Profitability Framework

A rigorous comparison separates several distinct quantities that are often conflated:

• Hardware efficiency — energy consumed per unit of hashrate (J/GH or J/MH), based on manufacturer specifications or measured output.
• Gross mining revenue — the value of coins credited before any costs are deducted.
• Operating cost — electricity, hosting, cooling, and maintenance over the same period as the revenue figure.
• Net operating result — revenue less operating costs for that period.
• Capital recovery — the point at which cumulative net operating results equal the delivered hardware cost, which is a separate question from day-to-day profitability.

For LTC/DOGE merged mining, net operating result can be expressed as:

Net operating result =
  gross value of credited LTC + DOGE + other eligible merged-mining coins
  − pool fees
  − electricity cost
  − hosting and other operating costs

Coin quantities and market prices should be taken from the same measurement window before their fiat values are combined, and pool fees should not be subtracted twice if a pool's displayed earnings figure already reflects them. Likewise, if a hosting quote includes electricity or cooling, do not add those charges again.

For a purchase forecast, first estimate coin output using a dated calculator with disclosed assumptions or pool earnings measured over a stated period. Expected output depends on effective hashrate, uptime, and each chain's network difficulty and reward rules; actual PPLNS earnings also vary with pool block-finding results and eligible contributions. Convert each coin's estimated output using prices from a consistent valuation time. Record whether the source already deducts pool fees. ViaBTC's fee and earnings page, for example, labels its average daily earnings estimates as based on the preceding seven days; historical averages should not be treated as fixed future yields.

Repeat the comparison when difficulty, coin prices, or operating conditions change. The same rig can earn fewer coins as difficulty rises, while a change in coin price alters the fiat value of that output.

A Hypothetical Profitability Comparison

To illustrate the method, assume every machine runs at its listed hashrate and power draw for 24 hours, uses the same pool terms, and receives combined LTC/DOGE and eligible merged-mining earnings worth $0.60 per GH/s per day after pool fees. This revenue assumption is chosen only for arithmetic; it is not a current market estimate. Electricity costs $0.10/kWh. Additional hosting, cooling, maintenance, and other operating costs are set to zero for this simplified example and must be included in a real budget.

Daily earnings after pool fees = hashrate in GH/s × $0.60
Daily operating result in this example = earnings after pool fees − electricity cost

Figures are rounded only for display. The low-power DL1 mode is excluded from this example because the cited announcement does not separately state its power draw.

Under these assumptions, the DL1 in normal mode produces the highest daily operating result among the listed configurations. The L9 produces a higher result than the DG2 despite its lower hashrate, because its electricity savings exceed the assumed revenue difference.

Daily profit and capital recovery can still rank machines differently. If the DL1's delivered cost were $6,000 and the L9's were $1,200—both hypothetical prices—their simple payback periods would be:

Simple payback = delivered hardware cost ÷ positive daily net operating result
DL1 Air: $6,000 ÷ $6.06 ≈ 990 days
L9: $1,200 ÷ $1.536 ≈ 781 days

The L9 would recover its hypothetical purchase cost sooner despite earning less per day. These are constant-assumption illustrations from the start of operation, excluding delivery delays and additional setup costs. They are not forecasts: changes in revenue, costs, or equipment life can prevent payback altogether. A machine with a zero or negative operating result has no simple payback under those assumptions.

How LTC/DOGE Merged-Mining Rewards Are Calculated and Paid

Because Dogecoin mining rigs typically operate through an LTC pool with merged mining enabled, the pool's payment rules directly affect realized revenue. ViaBTC's current documentation states that LTC miners using either the PPS+ or PPLNS payment method are eligible for merged-mining rewards in DOGE, along with several smaller AuxPoW coins (ViaBTC LTC merged-mining documentation). A distinction worth noting: DOGE and the other merged-mining coins are distributed under PPLNS regardless of whether the miner has selected PPS+ or PPLNS for their LTC rewards. Selecting PPS+ for LTC therefore does not make the merged-mining coin rewards fixed or guaranteed; DOGE-denominated earnings vary with the pool's actual block-finding results and the miner's eligible contribution within the applicable PPLNS window. According to the same source, merged-mining rewards are settled to the miner's ViaBTC account every two hours, which is an internal accounting credit and distinct from an on-chain withdrawal to an external wallet. Fee structures also differ by payment method — ViaBTC's published schedule applies separate percentages to the PPS block-reward component and the PPLNS transaction-fee component under PPS+, while PPLNS applies a single fee to block reward and transaction fees combined. Because pool fee schedules can change, miners should confirm the current rate on the pool's official fee page before calculating expected returns, rather than relying on a fixed percentage assumed from an older reference.

Practical Considerations Beyond the Spec Sheet

Manufacturer specifications describe a device's rated performance under defined test conditions; they do not guarantee identical results at every site. Ambient temperature, airflow, dust, and power-supply quality all affect whether a Scrypt ASIC sustains its rated hashrate and efficiency. Voltage requirements — for example, the Antminer L9's 220–277V single-phase input — determine whether a site's existing electrical infrastructure is compatible without modification. Noise level (75 dBA for the L9 at 25°C) is a factor for any location near living or working spaces. Delivered purchase price, shipping cost, and unit availability at the time of purchase can also outweigh a small difference in published J/GH, particularly for buyers acquiring a small number of units rather than a fleet. None of these factors are captured by a hashrate or efficiency figure alone, and all of them affect the net operating result described above.

Conclusion: Efficiency First, Then Site Economics

Based on manufacturer-published specifications checked on September 25, 2026, Bitdeer's SEALMINER DL1 Air reports the lowest energy consumption per unit of hashrate among current Scrypt ASICs reviewed here, at 149 J/GH in normal mode and 136 J/GH in low-power mode. The ElphaPex DG2+ and Bitmain Antminer L9 remain relevant alternatives depending on delivered price, availability, and site conditions. None of these figures constitute an independent, side-by-side field test, and none should be read as a guarantee of a specific return. A sound purchasing decision starts with comparing J/GH across current models, then applies the buyer's actual electricity rate, hardware cost, and chosen pool's payment method and fee structure before estimating net operating results. Compare daily operating profit and capital recovery separately, using a consistent revenue window and a realistic deployment date.

FAQ

Which Dogecoin mining rig has the lowest energy consumption per hash?

Among the Scrypt ASICs reviewed here, Bitdeer's SEALMINER DL1 Air reports the lowest published efficiency, at 149 J/GH in normal mode and 136 J/GH in its low-power mode, based on the manufacturer's March 16, 2026 announcement.

Can I mine Dogecoin without also mining Litecoin?

Dedicated DOGE-only mining is technically possible, but commercial Dogecoin mining commonly occurs through LTC/DOGE merged mining, where a Scrypt ASIC connected to a Litecoin pool earns LTC block rewards plus DOGE and other eligible merged-mining rewards from the same hashing work.

How often are merged-mining rewards paid out on ViaBTC?

According to ViaBTC's current documentation, LTC merged-mining rewards, including DOGE, are settled to the miner's account every two hours. This is an internal account credit and is separate from the timing of an external wallet withdrawal.

Does a higher hashrate always mean higher profit?

Not necessarily. A higher-hashrate rig typically draws more power, and its return depends on the combination of hashrate, energy efficiency, electricity price, hardware cost, and pool payment terms rather than hashrate alone.

References

Sources checked September 25, 2026.

1. Bitdeer, "SEALMINER DL1 Air" investor announcement, March 16, 2026
2. Bitmain, "Antminer L9 Specifications"
3. ElphaPex, Scrypt miner product listings
4. ViaBTC Help Center, "LTC Merged Mining Coins Mining Tutorial"
5. ViaBTC, Fees and payment methods
6. Dogecoin, Mining Dogecoin