We Compared 4 Solar Generators for Tiny Houses
Off-grid power editor
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This guide is for people powering a tiny house they actually live in, on a trailer or on a foundation. That job is not a bigger version of camping. The battery gets cycled every day for years, the loads are small but never stop, and every inch the unit occupies is an inch the house does not get back. We compared four expandable power stations on the specifications that decide those three things: capacity against a stated daily budget, expansion ceiling, rated cycle life, solar input and physical size. We did not test any of these units, and each review says exactly what its recommendation is based on. What you get here is one daily energy budget written out in full, every capacity converted into days of autonomy, cycle ratings converted into years at a tiny-house duty cycle, and watt-hours per cubic foot for the bay you are about to frame.
What is the best solar generator for a tiny house?
The BLUETTI AC200L suits most tiny houses because its 1200W solar ceiling accepts far more panel than a typical daily budget needs, which is what carries you through short winter days, and it expands to 8192Wh. If the battery has to hide on a shallow shelf, the EcoFlow DELTA 3 Plus is only 8 inches deep.
Key takeaways
- Size a tiny house from its daily watt-hour budget and continuous average draw, not from peak wattage
- A published solar input ceiling is a design constraint, because you cannot bolt on more panel than the unit will accept
- Cycle ratings assume one full cycle a day, so a 1024Wh pack on a 1.7kWh budget burns through them in about 60% of the advertised years
- Buying capacity you do not yet need slows battery ageing, because shallow cycles count proportionally
- Watt-hours per cubic foot matters more than pounds when you are framing a permanent battery bay
Our picks at a glance
Every unit below wins a specific situation rather than a place in a ranking. Pick the row that matches how you will actually use it.
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Best for solar-first tiny houses
BLUETTI AC200L
Tiny houses that will run mainly on roof or ground-mount solar all year, where the battery lives in a fixed bay and never needs to be carried anywhere.
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Best for shallow shelf and cabinet installs
EcoFlow DELTA 3 Plus
Tiny houses where the battery has to disappear into joinery, and owners willing to buy an expansion pack at the same time rather than a year later.
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Best for generator and short-window recharging
OUPES Mega 1
Tiny houses that top up from a portable generator or an occasional shore-power hookup, and kitchens with an induction hob rather than propane.
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Best for 12V lighting and pump circuits
VTOMAN FlashSpeed 1500
Tiny houses already wired for 12V lighting, fans and a water pump, where the power station feeds those circuits directly and the AC side is for occasional use.
How they compare
Scroll the table sideways to see every column.
| Product | Where to buy | Award | Capacity | AC output | Expandable | Rated cycle life | AC recharge time | Weight | Dimensions | Best for |
|---|---|---|---|---|---|---|---|---|---|---|
| BLUETTI AC200L | Best for solar-first tiny houses | 2048Wh | 2400W | Yes, to 8192Wh with expansion batteries | -- | 0-80% in 45 minutes (2400W AC input) | 61.41 lb (27.9 kg) | 16.5 x 11 x 14.4 in | Tiny houses that will run mainly on roof or ground-mount solar all year, where the battery lives in a fixed bay and never needs to be carried anywhere. | |
| EcoFlow DELTA 3 Plus | Best for shallow shelf and cabinet installs | 1024Wh | 1800W | Yes, up to 5kWh with DELTA 3, DELTA Pro 3 or DELTA 2 Max battery packs | 4,000 cycles to 80% | 40 minutes to 80% on 1500W AC input | 27 lb (12.2 kg) | 16 x 8 x 11 in | Tiny houses where the battery has to disappear into joinery, and owners willing to buy an expansion pack at the same time rather than a year later. | |
| OUPES Mega 1 | Best for generator and short-window recharging | 1024Wh | 2000W (4500W surge) | Yes, to 5120Wh with two B2 extra batteries | 3,500+ cycles to 80% | 36 minutes to 80% on AC, 26 minutes with AC and solar together | 27.8 lb (12.6 kg) | 15.1 x 9.1 x 11.6 in | Tiny houses that top up from a portable generator or an occasional shore-power hookup, and kitchens with an induction hob rather than propane. | |
| VTOMAN FlashSpeed 1500 | Best for 12V lighting and pump circuits | 1548Wh | 1500W (3000W peak) | Yes, to 3096Wh with one extra battery | 3,000+ cycles to 80% | 1 hour to full on 1500W AC input, 45 minutes with AC, solar and DC combined | 41.5 lb (18.8 kg) | 15.4 x 10.6 x 11.0 in | Tiny houses already wired for 12V lighting, fans and a water pump, where the power station feeds those circuits directly and the AC side is for occasional use. |
The full reviews
Best for solar-first tiny houses
BLUETTI AC200L
BLUETTI
The AC200L is the only unit on this shortlist whose 1200W solar ceiling is oversized for a tiny house rather than matched to it, which is exactly what you want when December gives you three usable hours of sun. You pay for that headroom in 61.41 lb and in a footprint you will notice on a 200 square foot floor.
What we like about the BLUETTI AC200L
- 1200W solar input accepts roughly 2.4 times the array a 1.7kWh daily budget needs, so short winter days still refill the pack
- 2048Wh covers a 70W continuous house draw for 29 hours, so one cloudy day does not empty it
- Expands to 8192Wh, which is about 4.9 days of autonomy at the same daily budget
- The 30A RV port plugs straight into the inlet most trailer-built tiny houses already have
Where it falls short for the BLUETTI AC200L
- At 61.41 lb it is a two-person lift and effectively a permanent installation, so the bay you build for it has to be right first time
- The 45-minute refill to 80% averages roughly 2185W of input, more than a common 2000W inverter generator can supply, so you will not see that figure on generator power
- The 30A RV port carries a 2400W inverter behind it, so it is a connector match rather than a genuine 30A supply and will trip on loads a shore pedestal would carry
- No rated cycle life appears in the specification set we compared, so you cannot check its daily-cycling lifespan against the 4,000-cycle DELTA 3 Plus
Key specifications
- Capacity
- 2048Wh
- AC output
- 2400W
- Max solar input
- 1200W
- Expandable
- Yes, to 8192Wh with expansion batteries
- Ports
- 11 ports, including a 30A RV port and a 48V/8A DC port
- Weight
- 61.41 lb (27.9 kg)
A tiny house is not a camping trip with a smaller tent. The battery gets cycled every single day, forever, and the thing that decides whether that works is not capacity. It is whether you can put the energy back in.
Why solar input ceiling is the number that matters here
Take a modest full-time tiny-house day: a 12V compressor fridge averaging 45W across its duty cycle, five hours of LED lighting at 20W, a router drawing 10W around the clock, four hours of laptop and phone charging at 60W, and a water pump running twelve minutes. That is 1,672Wh, call it 1.7kWh, and it averages about 70W continuously.
To replace 1,672Wh in a 4.5 peak-sun-hour day you need roughly 372W of panel producing at nameplate. Derate to a realistic 75% for heat, wiring and angle and you are looking for about 500W of array.
The AC200L accepts 1200W. That is 2.4 times what the budget needs, and the headroom is the point. On a December day that delivers two usable hours instead of four and a half, an oversized array is the only thing that keeps the pack level. A unit capped at 400W simply cannot use the extra panel you bolt on.
What 2048Wh buys before the sun comes back
At the 70W continuous average above, 2048Wh runs for 29 hours. Against the full daily budget it is 1.2 days. That is the practical difference between this and the 1024Wh units here: a fully overcast day does not force you to choose between the fridge and the lights.
Expanded to 8192Wh, the same budget gives about 4.9 days of autonomy, which covers a genuine winter weather system rather than one bad afternoon.
Where it costs you
Sixty-one pounds in a house where every pound rides on a trailer axle is a real decision, and it is not a unit you reposition on a whim. Build the bay, vent it, and accept that it lives there.
The recharge figure needs reading carefully too. Refilling 1,638Wh in 45 minutes means pulling about 2,185W. From a house hookup, fine. From the 2000W inverter generator most tiny-house owners actually own, that rate is not available, and your refill takes proportionally longer.
Who should choose something else
If the house will spend its winters plugged into shore power or topped up from a generator, you are paying for solar headroom you will never use. The OUPES Mega 1 reaches 80% in 36 minutes on about 1,365W of input, a rate a 2000W inverter generator can actually deliver, which is not true of the 2,185W this unit’s 45-minute figure assumes. If floor area is the binding constraint rather than sun, the DELTA 3 Plus takes about 30% less of it.
- Best for
- Tiny houses that will run mainly on roof or ground-mount solar all year, where the battery lives in a fixed bay and never needs to be carried anywhere.
- Choose something else if
- You want a unit you can lift alone, or your only charging source is a small inverter generator that cannot feed anything close to 2400W.
Best for shallow shelf and cabinet installs
EcoFlow DELTA 3 Plus
EcoFlow
Eight inches deep and 16 inches wide, the DELTA 3 Plus slides onto a shelf that would not take any other unit here, then grows to 5kWh when the house needs more. The catch is that 1024Wh on its own is well under a full tiny-house day, so the expansion battery is part of the purchase rather than a later option.
What we like about the EcoFlow DELTA 3 Plus
- At 16 x 8 x 11 in it takes 128 square inches of floor, about 30% less than the AC200L, and fits a shallow under-counter shelf
- 4,000 cycles to 80% is the longest rated life on this shortlist, worth about 11 years at one full cycle a day
- Expands to 5kWh, roughly three days of autonomy at a 1.7kWh daily budget
- 10ms UPS switchover keeps a router, a well controller or a CPAP running through a source change
- Refills 819Wh in 40 minutes, an average input of about 1229W, so a short shore-power stop is useful
Where it falls short for the EcoFlow DELTA 3 Plus
- 1024Wh covers only about 14.6 hours of a 70W continuous house draw, so on its own it cannot carry a full-time tiny house through a single overcast day
- Used alone it runs about 1.6 full cycles a day against a 1.7kWh budget, which spends the 4,000-cycle rating in roughly 6.7 years rather than 11
- No solar input ceiling appears in the specification set we compared, so you cannot size an array against it the way you can with the AC200L
- Expansion is tied to EcoFlow's DELTA 3, DELTA Pro 3 and DELTA 2 Max packs, so the growth path locks you to one brand's ecosystem
Key specifications
- Capacity
- 1024Wh
- AC output
- 1800W
- Rated cycle life
- 4,000 cycles to 80%
- Expandable
- Yes, up to 5kWh with DELTA 3, DELTA Pro 3 or DELTA 2 Max battery packs
- Dimensions
- 16 x 8 x 11 in
- UPS switchover
- 10ms
Every other specification in this category is negotiable in a tiny house. Floor area is not. The DELTA 3 Plus wins here because of a dimension most buying guides never print.
Eight inches of depth changes where it can live
At 16 x 8 x 11 in, this unit occupies 128 square inches of floor. The AC200L occupies 181.5. That is roughly 30% less of the scarcest resource in the building, and the 8-inch depth is the part that matters most: it clears a shallow shelf, a stair riser cavity or an under-counter run that the AC200L’s 11-inch depth simply will not enter.
Per cubic foot it holds about 1,257Wh, which is not the best figure here. But volume is not what constrains a tiny house. Where the box can physically go is.
The cycle-life arithmetic, done honestly
A 4,000-cycle rating sounds like a lifetime, and manufacturers let you assume it means eleven years. That assumption only holds at one full cycle a day.
Run this unit alone against the 1.7kWh daily budget used throughout this guide and you are drawing 1,672Wh from a 1,024Wh pack, which is about 1.63 equivalent full cycles every day. Four thousand cycles at that rate is roughly 2,450 days, or 6.7 years.
Now add the expansion pack. At 5kWh the same daily draw is about a third of a cycle, and the rated cycles stop being the limiting factor at all: calendar ageing takes over long before you count them out. This is the strongest argument for buying capacity you do not immediately need, and it applies to every unit here.
What it does not do
One thousand and twenty-four watt-hours is 14.6 hours at a 70W continuous draw. A full-time tiny house does not fit inside that, and pretending otherwise is how people end up rationing lights in February. Treat the expansion battery as part of the purchase, not an upgrade.
The other gap is planning. There is no published solar input ceiling in the specification set we compared, so if your build starts with an array size and works backwards, you cannot do that arithmetic against this unit. The AC200L gives you a number to design against.
Who should choose something else
If the unit is going in an open bay where depth does not matter, the AC200L carries twice the energy and a solar ceiling you can plan around. If you charge mainly from a small generator, the OUPES Mega 1 puts the same 819Wh back in 36 minutes instead of 40, and pairs it with a 2000W inverter.
- Best for
- Tiny houses where the battery has to disappear into joinery, and owners willing to buy an expansion pack at the same time rather than a year later.
- Choose something else if
- You want one box that covers a full day without an expansion battery, or you are designing a solar array and need a published input ceiling to size it against.
Best for generator and short-window recharging
OUPES Mega 1
OUPES
Thirty-six minutes to 80% is the fastest refill here, and a 2000W inverter on a 27.8 lb box is unusual enough to matter when a tiny house has an induction hob or a shallow-well pump. What it does not have is much of a buffer: 1024Wh runs down fast in a dwelling that never switches off.
What we like about the OUPES Mega 1
- 36 minutes to 80% returns about 819Wh, which is 49% of a full tiny-house day recovered in a little over half an hour of generator run time
- 26 minutes to 80% with AC and solar together, so a lunch-break shore-power stop in good sun refills most of the pack
- 2000W continuous with a 4500W surge starts an induction hob or a shallow-well pump that a 1500W inverter would trip on
- Expands to 5120Wh with two B2 batteries, roughly three days of autonomy at a 1.7kWh daily budget
- 3,500+ cycles to 80% on LiFePO4, and 12V DC outputs for house lighting circuits
Where it falls short for the OUPES Mega 1
- 1024Wh is about 14.6 hours at a 70W continuous draw, so used alone it will not carry a full-time tiny house overnight and through a grey morning
- No published solar input ceiling in the specification set we compared, which makes it the hardest unit here to design a permanent array around
- Reaching 5120Wh means two separate B2 batteries plus the head unit, so the finished installation is three boxes and three bays rather than one
- The 36-minute figure implies about 1365W of input, so a 1000W inverter generator will not deliver it
Key specifications
- Capacity
- 1024Wh
- AC output
- 2000W (4500W surge)
- AC recharge time
- 36 minutes to 80% on AC, 26 minutes with AC and solar together
- Expandable
- Yes, to 5120Wh with two B2 extra batteries
- Rated cycle life
- 3,500+ cycles to 80%
- Weight
- 27.8 lb (12.6 kg)
Most tiny houses are not purely solar, whatever the brochure photographs imply. There is a generator in the trailer box, or a friend’s outlet, or a campground pedestal for two hours. The question is how much energy you can capture in the window you actually get.
What 36 minutes is worth
Eighty percent of 1024Wh is 819Wh. Returning that in 36 minutes means the unit is averaging roughly 1,365W of input.
Set that against the daily budget used across this guide, 1,672Wh for a fridge, lights, a router, device charging and a water pump. Thirty-six minutes of generator run time covers about 49% of that day.
Running longer does not scale the way people assume, because the pack itself is the ceiling. A completely full 1024Wh is 61% of the budget, so no single charging session covers a tiny-house day outright. The generator has to come back the next day, or the array has to carry the rest.
Run AC and solar together and the same 819Wh arrives in 26 minutes. For anyone who parks somewhere with power for a lunch break, that is the difference between a useful stop and a token one.
The inverter is bigger than the box suggests
Two thousand watts continuous from a 27.8 lb unit is not typical, and the 4500W surge rating is the headline. In a tiny house it changes what the kitchen can be. A 1500W inverter rules out most induction hobs and makes a shallow-well pump a gamble. This clears both.
That capability is why the OUPES appears here rather than higher-capacity units that stop at 1500W: in a small dwelling the load you cannot start is a bigger problem than the hour of runtime you do not have.
Where the arithmetic turns against it
One thousand and twenty-four watt-hours is 14.6 hours at 70W continuous. In a house that never switches off, that is one night. There is no version of this unit as a standalone tiny-house battery.
Expansion fixes the capacity but not the packaging. Two B2 batteries take it to 5120Wh, about three days of autonomy, and they arrive as two more boxes to house, strap down and ventilate. Plan the bay for three units, not one.
The larger planning gap is solar. Without a published input ceiling we could compare, you cannot size a permanent array against this unit with any confidence. If your build starts with panels on a roof, that is a genuine reason to look at the AC200L instead.
Who should choose something else
Full-time solar with no generator points at the AC200L and its 1200W ceiling. Wanting one box on one shelf points at the DELTA 3 Plus. This unit earns its place when the charging source is intermittent and the kitchen is electric.
- Best for
- Tiny houses that top up from a portable generator or an occasional shore-power hookup, and kitchens with an induction hob rather than propane.
- Choose something else if
- Solar is your only charging source and you need a published input ceiling to size the array, or you want the whole battery system in a single bay.
Best for 12V lighting and pump circuits
VTOMAN FlashSpeed 1500
VTOMAN
Two DC5521 barrel outputs and a car port let a tiny house run its lights, fans and water pump on 12V without going through the inverter at all, which is how most purpose-built tiny houses are wired anyway. It also packs the most energy per cubic foot here, at the cost of the smallest solar ceiling on the shortlist.
What we like about the VTOMAN FlashSpeed 1500
- 2x DC5521 outputs plus a car port drive 12V LED strips, roof fans and a water pump directly, with no DC-to-AC-to-DC round trip
- 1,490Wh per cubic foot is the densest on this shortlist, ahead of the AC200L at 1,354 and the DELTA 3 Plus at 1,257
- 1548Wh runs a 70W continuous house draw for 22 hours, close to a full day from a single box
- 12 ports in total, so a tiny house rarely needs a power strip hanging off it
- Full recharge in 1 hour on 1500W AC input, or 45 minutes with AC, solar and DC combined
Where it falls short for the VTOMAN FlashSpeed 1500
- The 400W solar ceiling harvests roughly 1350Wh on a good 4.5 peak-sun-hour day after a realistic 75% derate, which is about 320Wh short of a 1.7kWh tiny-house day, so solar alone will slowly drain it
- 3,000+ cycles is the shortest rating here, worth roughly 7.6 years at the 1.08 cycles a day this budget implies
- The 1500W inverter is 500W below the OUPES Mega 1 and will not start an induction hob, so the kitchen has to stay propane or low-wattage
- Expansion stops at 3096Wh with one extra battery, about 1.9 days of autonomy, which is the lowest ceiling on this shortlist
Key specifications
- Capacity
- 1548Wh
- AC output
- 1500W (3000W peak)
- Ports
- 12 total, 3 AC outlets, 4x USB-A, 2x USB-C, 2x DC5521, car port
- Expandable
- Yes, to 3096Wh with one extra battery
- Max solar input
- 400W
- Dimensions
- 15.4 x 10.6 x 11.0 in
Tiny houses that were designed rather than assembled are usually 12V houses. The lights are 12V strips, the roof fan is 12V, the water pump is 12V. Feeding those from an AC power station means converting DC to AC and back to DC for no reason.
The port list is the reason it is here
Two DC5521 barrel outputs and a car port cover the three loads a tiny house runs most hours of most days. Wiring the lighting circuit and the pump to those outputs skips the inversion step entirely.
That is not a headline specification and no retailer listing frames it that way, but in a dwelling where the 12V loads are on for sixteen hours a day and the AC loads are on for two, it is the port list that decides how the house is wired.
Densest energy per cubic foot on the shortlist
At 15.4 x 10.6 x 11.0 in, this case is 1.04 cubic feet and holds 1548Wh. That works out at about 1,490Wh per cubic foot.
For comparison, the AC200L manages 1,354Wh per cubic foot, the DELTA 3 Plus 1,257 and the OUPES Mega 1 1,110. If you are building a battery bay and the constraint is volume rather than a shallow shelf, this unit gives you the most stored energy for the cavity you frame.
In runtime terms, 1548Wh at the 70W continuous draw used throughout this guide is 22 hours. That is very nearly a full day from one box, which none of the 1024Wh units on this list can claim.
The solar ceiling is the problem
Four hundred watts of input is the lowest here, and the arithmetic is unforgiving. Four hundred watts across 4.5 peak sun hours is 1,800Wh at nameplate, and about 1,350Wh once you derate 25% for heat, wiring and panel angle.
The daily budget in this guide is 1,672Wh. That leaves you roughly 320Wh short every clear day, before you reach a single cloudy one. Bolting more panel on does not help, because the unit will not take it.
So this is not a solar-primary battery. It is a battery for a house that also plugs in, runs a generator, or accepts a genuinely smaller daily budget than the one modelled here.
Who should choose something else
If solar is the whole plan, the AC200L takes three times the panel and that is the entire argument. If the kitchen is electric, the OUPES Mega 1 has 500W more inverter. Choose the FlashSpeed when the house is 12V, the bay is already framed, and there is another way to charge it.
- Best for
- Tiny houses already wired for 12V lighting, fans and a water pump, where the power station feeds those circuits directly and the AC side is for occasional use.
- Choose something else if
- Solar is your only charging source, or the kitchen runs on induction and needs more than 1500W of continuous inverter output.
How we researched this guide
Four expandable units were compared on published manufacturer specifications and electrical documentation, then converted into days of autonomy, watt-hours per cubic foot and years of service against one stated tiny-house budget of about 1.7kWh a day. None of these units were tested by us, and every review names the sources it relies on.
The full process is on our how we test portable power stations page, including what counts as hands-on use.
- Units evaluated
- 4
- Used hands-on
- 0
- Assessed from documentation and owner reports
- 4
Evaluation methods used: specification comparison
Which one should you buy?
Match your situation on the left to the recommendation on the right.
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Solar will be your only charging source all year
Recommendation: Buy the BLUETTI AC200L for its 1200W input ceiling, roughly 2.4 times the array a 1.7kWh day needs
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The battery has to fit under a counter or on a shallow shelf
Recommendation: Buy the EcoFlow DELTA 3 Plus, 8 inches deep and 128 square inches of floor
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You top up from a portable generator or short shore-power stops
Recommendation: Buy the OUPES Mega 1, which returns 819Wh in 36 minutes, about half a tiny-house day inside a short generator run
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Your kitchen runs on induction rather than propane
Recommendation: Buy the OUPES Mega 1 for its 2000W continuous and 4500W surge rating
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The house is already wired for 12V lights, fans and a water pump
Recommendation: Buy the VTOMAN FlashSpeed 1500 and feed those circuits from its DC5521 and car outputs
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You want the most stored energy for the smallest framed cavity
Recommendation: Buy the VTOMAN FlashSpeed 1500 at about 1490Wh per cubic foot
Mistakes buyers make
- Sizing from a camping trip instead of a daily budget, then discovering a 1024Wh unit covers about 14.6 hours of a house that never switches off
- Buying a unit with a low solar input ceiling and then trying to fix a shortfall by adding panel the charge controller will not accept
- Reading a 4,000-cycle rating as eleven years without checking how many cycles a day your own budget actually demands
- Framing a battery bay for the head unit only, then having nowhere to put the expansion batteries that make the system work
- Installing the pack in an uninsulated exterior storage bay, where LiFePO4 cells refuse to charge below freezing
- Choosing a 1500W inverter for a house with an induction hob, which leaves the main cooking appliance unusable
Our final recommendation
If you want one answer rather than a shortlist, this is the unit that suits the widest range of readers in this category.
Best for solar-first tiny houses
Tiny houses that will run mainly on roof or ground-mount solar all year, where the battery lives in a fixed bay and never needs to be carried anywhere.
Questions buyers ask
How many watt-hours does a tiny house actually use per day?
Most lean full-time builds land between 1kWh and 3kWh. The budget modelled in this guide is 1,672Wh. Houses with electric cooking, a mini-split or an electric water heater run far higher and are outside what any single unit here covers. Measure your own loads with a plug meter for a week before you buy anything.
Can a power station replace a wired battery bank and inverter?
For a modest tiny house, yes, and it saves you a charge controller, an inverter and the wiring between them. Where it stops working is at high continuous loads or when you want the bank in the 5kWh to 15kWh range, at which point a wired system costs less per watt-hour and can be serviced cell by cell.
Will the battery freeze in an exterior storage bay?
It will not be damaged by sitting cold, but LiFePO4 cells refuse to accept a charge below freezing to protect themselves. A unit stored in an unheated exterior bay through a northern winter may simply stop charging on the coldest mornings. Keep it inside the insulated envelope if you can.
Do I need a 30A RV inlet on the house to use one of these?
No. The AC200L has a 30A RV port that matches an inlet you may already have, but that is a connector convenience, not 30 amps of supply, because a 2400W inverter sits behind it. Every unit here works fine feeding a few circuits or a short run of extension cords instead.
How long before the battery needs replacing?
Divide the rated cycles by how many equivalent full cycles a day your budget demands. At 1,672Wh a day the DELTA 3 Plus used alone spends its 4,000 cycles in about 6.7 years, while the same unit expanded to 5kWh cycles so shallowly that calendar ageing, not cycle count, ends its life.
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