Head-to-head test
Jackery Explorer 1500 Ultra vs Jackery Explorer 1500 v2
Same 1,536Wh battery, but the Explorer 1500 v2 is $300 cheaper, lighter, higher-output, and faster-charging than the Explorer 1500 Ultra — while the Ultra's whole premium buys IP65 ruggedness and double the solar input. Value versus weatherproofing.
Written by Ian SchneiderUpdated
Solar & Off-Grid Tester, Station Arena Test Desk
Jackery
Explorer 1500 Ultra
3,193Power Score · Appliance Class
$999.00 list · direct from Jackery
Jackery
Explorer 1500 v2
3,518Power Score · Appliance Class
$699.00 list · direct from Jackery
Spec deltas
These two Jackery units share the same 1,536Wh LFP battery, the same 4,000-cycle rating, the same 30dB noise, and the same 20 ms UPS — but they're $300 apart, and the cheaper one is better in most respects. The Explorer 1500 v2 lists at $699; the Explorer 1500 Ultra at $999, for a specific set of upgrades.
The v2's case is value, and it's compelling. At 32 lbs it's billed as the world's lightest 1.5kWh LFP stationB1 — 6.6 lbs lighter than the Ultra — and it's the lowest cost-per-watt in its classB3, pushing more output (2,000W vs 1,800W), more surge, and a faster ~64-minute charge to the Ultra's ~1.5 hours. It's cheaper to buy and cheaper to own.
The Explorer 1500 Ultra's premium buys exactly two things: a true IP65 dustproof, water-resistant body — unique at its priceA1 — and double the solar input (800W vs 400W). Those are real, specific upgrades for outdoor and off-grid use. But for wall charging and indoor or covered use, you're paying $300 more for weatherproofing and solar you may not need.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
continuous output
It costs $300 less, weighs 6.6 lbs less — the world's lightest 1.5kWh LFP stationB1 — and pushes 2,000W to the Ultra's 1,800W, all on the same 1,536Wh battery.
v2 $699 vs Ultra $999v2 32 lbs vs Ultra 38.6v2 2,000W output vs Ultra 1,800W
Why it mattersFor value, portability, and output, the v2 gives you more for less.
solar input
The 1500 Ultra carries a true IP65 dustproof, water-resistant rating unique in its bracketA1 and takes 800W of solar to the v2's 400W — twice the input for off-grid refills.
Ultra has a true IP65 dustproof, water-resistant ratingA1Ultra 800W solar vs v2 400WThe Ultra's ruggedness is unique in its price bracketA1
Why it mattersFor jobsites, boats, rough outdoor use, or heavy solar charging, the Ultra's extra $300 is justified.
cost / lifetime kWh
Over the same 4,000 cycles, the v2's lower price makes it cheaper to own ($0.11 vs $0.16 per lifetime kWh), and it recharges from the wall in about 64 minutes to the Ultra's ~1.5 hoursB3.
v2 $0.11 per lifetime kWh vs Ultra $0.16v2 charges fully in about 64 minutesB3; Ultra in ~1.5 hoursBoth rated 4,000 cycles
Why it mattersThe v2 costs less across its life and gets back to full faster — value at both ends.
Both hold 1,536Wh, so they cover a CPAP, workday, or tailgate but fall short of a weekend of camping (161%) or an 8-hour blackout (126%) — and neither expands, so the capacity is fixed.
Both hold 1,536WhBoth miss a weekend (161%) and a blackout (126%) on the baseNeither expands
Why it mattersFor runtime the two are identical; the choice is purely value versus ruggedness-and-solar, not how long they last.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The $300 price gap and cheaper cost-to-own are the v2's whole case.
cost / lifetime kWh
The value round is a rout for the v2. At $699 to the Ultra's $999, it's $300 cheaper for the identical 1,536Wh battery and 4,000-cycle rating — and because the price is lower over the same capacity and lifespan, it's cheaper to own too: $0.11 per lifetime kWh against the Ultra's $0.16. Reviewers call it the lowest cost-per-watt 1.5kWh LFP station on the marketB3.
So the v2 isn't a stripped-down compromise — it's the same core unit for meaningfully less, and even adds more output (2,000W) and faster charging. The Ultra's $300 premium buys ruggedness and solar, not capacity or longevity. Unless you specifically need those, the v2 is the far more economical path to 1.5kWh of LFP capacity, exactly as reviewers frame itB4.
What the Specs Don't Tell You
Selected because: Warranty fires; output, IP65, and solar are the deciding un-flagged specs.
Only warranty formally fires — both carry 5 years, but the v2's lower price makes that coverage cost about $140 per year to the Ultra's $200. The un-flagged spec differences favor the v2 too: it pushes 2,000W of output to the Ultra's 1,800W with more surge (4,000W vs 3,600W), both at a healthy 2x ratio, so it runs slightly heavier loads.
The Ultra's un-flagged advantages are the ones you pay for: its IP65 rating is genuine dust-and-water resistance unusual at this priceA1, and its 800W solar input doubles the v2's 400W. Neither shows up as a gotcha, but they're the whole reason the Ultra exists. So the split is clean: the v2 wins value, weight, output, and charging; the Ultra wins ruggedness and solar.
Portability & Form Factor
Selected because: Weight favors the v2; IP65 ruggedness favors the Ultra.
weight
The v2's headline is weight: at 32 lbs it's billed as the world's lightest 1.5kWh LFP stationB1, 6.6 lbs lighter than the Ultra's 38.6. For a unit you'll carry to campsites, into a car, or between rooms, that's a real, felt difference — and it pairs with a versatile 7-port layout, including dual USB-C and a DC car output, that reviewers single out as genuinely usefulB2.
The Ultra trades that weight for its rugged IP65 shell — totally dustproof and resistant to heavy rain and splashesA1 — which the v2 can't match. So portability favors the lighter v2, but toughness firmly favors the Ultra. If the unit lives outdoors, on a boat, or on a jobsite, the Ultra's weatherproofing earns its extra weight and cost; for indoor, car, or covered use, the lighter, cheaper v2 is the friendlier pick.
Growth Path
Selected because: Both sealed — capacity is fixed, throwing the choice onto the differences.
solar input
Neither unit expands — both are sealed at 1,536Wh, so capacity is fixed at what you buy. That makes the choice about the unit itself, not future growth: at 1.5kWh, both cover a CPAP, a workday, or a tailgate but fall short of a weekend of camping or an 8-hour blackout, and neither can grow to close that gap.
So if 1,536Wh isn't enough for your needs, neither Jackery is the answer — you'd want a larger or expandable station. Within this pair, the sealed capacity is identical, which throws the decision entirely onto the differences that remain: the v2's lower price, weight, and output, or the Ultra's ruggedness and solar. Buy the capacity you need today, from whichever variant fits your use.
Strengths & trade-offs
Jackery Explorer 1500 Ultra
Strengths
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$300) than the Explorer 1500 v2.
Jackery Explorer 1500 v2
Strengths
- +Costs $300 less
- +Lighter by 6.6 lb
- +Higher AC output
Trade-offs
- –No major technical downsides compared to rival.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Neither unit
A full weekend (2,100Wh) overruns both 1,536Wh units at 161%, so neither covers a whole trip on the base. For camping, the v2 is 6.6 lbs lighter to haul in, while the Ultra's IP65 body shrugs off dust and rain and its double solar (800W vs 400W) refills faster between days. If you're solar-supported and rugged-minded, the Ultra; if you charge before you go and want the lightest carry, the v2.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Neither unit
A full blackout (1,645Wh) exceeds both 1,536Wh units (126%), so neither lasts the full stretch on heavy loads. For essentials both bridge a while identically, since capacity is the same; the v2's lower price and faster recharge suit a simple home backup, while the Ultra's ruggedness matters more outdoors than in a utility room. Neither expands, so size up if you need full outage coverage.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
Either unit
A CPAP uses about a quarter of either overnight — both handle it easily, and quietly at 30dB. Capacity and noise are identical, so the choice is incidental here: the v2 is lighter to move to the bedside and cheaper, the Ultra tougher if it travels. For sleep-therapy backup, either is ample; decide on the bigger-picture factors.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Either unit
A full work day uses about 70% of either 1,536Wh unit, so both cover a shift with a little margin. Same capacity, so runtime is identical; the v2's higher 2,000W output and 7-port layout suit a busy desk, while the Ultra's rugged build suits an outdoor or jobsite workstation. Both power a home office all day — the v2 just costs $300 less to do it.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Game day fits on either at about half the battery. Both have the power; the difference is hauling and toughness — the v2 is 6.6 lbs lighter to carry to the lot, while the Ultra's IP65 body handles a rainy tailgate without worry. For a typical dry, drive-up event, the lighter, cheaper v2 is the easy pick; for a muddy or wet one, the Ultra.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
A van-life day wants about 4,685Wh, far past either 1,536Wh base (359%). Neither expands, so both fall well short as a main bank for full-time van power. Used as a supplementary unit, the Ultra's double solar and rugged body suit a rig better, while the v2's lighter weight and lower price ease a budget build — but size the main system separately regardless.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
Dead heat — both run this 205W load for roughly 6.4h. Pick on price, weight, or ports.
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–87hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–17.4hHigh-Draw Appliances
These reveal the real limitsscale 0–1.3h¹ Runtime = (capacity × 0.85) ÷ appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads — see methodology.
Conclusion
July 12, 2026
Verdict: the Explorer 1500 v2
The Explorer 1500 v2 is the value pick, and a strong one. It shares the Ultra's 1,536Wh capacity, 4,000-cycle rating, 30dB noise, and 20 ms UPS but costs $300 less ($699 vs $999) — 'the world's lightest 1.5kWh LFP station' at 32 lbs (vs 38.6) and the lowest cost-per-watt in its classB1B3 — while pushing more output (2,000W vs 1,800W), more surge, and charging faster (~64 minutes vs ~1.5 hoursB3). It's also cheaper to own ($0.11 vs $0.16 per lifetime kWh). The Explorer 1500 Ultra earns its premium in exactly two ways: a true IP65 dustproof, water-resistant body unique at its priceA1, and double the solar input (800W vs 400W). For rugged outdoor use or heavy solar, the Ultra is worth it; for everything else, the v2 is the same core battery — lighter, faster, and $300 cheaper. Lean Explorer 1500 v2 for value, weight, and output; the 1500 Ultra for IP65 ruggedness and solar.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 12, 2026. The links below open Jackery's current price.
$699.00 list · direct from Jackery
or check the Explorer 1500 Ultra price$999.00 list
Written by Ian Schneider, Solar & Off-Grid Tester · Station Arena Test Desk · Updated July 12, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Full specifications
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5★. Here, Explorer 1500 Ultra rates 3.7/5 (22nd percentile of 24 Everyday-class units), and Explorer 1500 v2 rates 4.6/5 (78th percentile of 24 Everyday-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Same 5 Years, $300 Cheaper to Cover on the v2
Both units carry Jackery's 5-year warranty, so the protection is identical. But because the Explorer 1500 v2 costs $300 less, that coverage works out to about $140 per warranty year against the Ultra's $200. Same peace of mind, less money — a small reflection of the v2's broader value case, which also includes the lightest weight in the class, more output, and faster charging on the same 1,536Wh battery. The Ultra's premium buys ruggedness and solar, not longer or cheaper coverage.
Full record above — the Test Desk pick is the Explorer 1500 v2.
Check Explorer 1500 v2 price →or check the Explorer 1500 Ultra priceOwnership Analysis
What happens after you buy — true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The Explorer 1500 v2 wins on both sticker price and long-term value. At $0.11/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Growth path
Explorer 1500 Ultra
FIXED CAPACITYFixed at 1,536Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 800W of solar. Suitable for a 1-2 panel setup.
Limited ports. You'll likely need a power strip or splitter.
Explorer 1500 v2
FIXED CAPACITYFixed at 1,536Wh, with no expansion — so size it for your needs up front rather than planning to add capacity later.
Accepts up to 400W of solar. Suitable for a 1-2 panel setup.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Neither expands, and that's no knock on either — each is a complete unit at a fixed size. Buy the capacity that covers your needs now (the Explorer 1500 Ultra gives you the larger ceiling); you can't add to either later.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
Jackery Explorer 1500 Ultra
The Explorer 1500 Ultra is a CES-2026 launch built around ruggedness: a 1,536Wh LFP battery in a fully sealed, IP65-rated body — totally dustproof and resistant to heavy rain and splashes, which reviewers note is unique in its price bracketA1 — with a titanium-alloy multi-layer cooling structure. Jackery claims it's up to 53% lighter than comparable-capacity competitorsA2.
It charges in about 1.5 hours via ChargeShield 2.0, on the same 4,000-cycle LFP battery and 5-year warranty as its siblingA3. Reviewers score it 9.1/10, citing the IP65 certification, quick recharge, and durable battery as its three defining strengthsA4. As a newer release, long-term owner data is still thin — the rugged body is the reason to pay up.
“Built around a 1,536Wh LFP battery with a true IP65 dustproof and water-resistant rating — unique in its price bracket — and a fully sealed titanium-alloy multi-layer cooling structure; totally protected against dust, and resistant to low-pressure water jets, heavy rain, and splashes.”
Sources
backuppowerhub.com · gearbrain.com · protoolreviews.com · jackery.com · thesolarlab.com
Jackery Explorer 1500 v2
The Explorer 1500 v2 earns praise as the value pick of the class: reviewers call it the world's lightest 1.5kWh LFP station at about 32 lbsB1 and the lowest cost-per-watt 1.5kWh LFP unit on the market, charging fully in roughly 64 minutesB3. Its seven simultaneous outputs — three AC outlets, dual USB-C, and a DC car port — are singled out as genuinely useful for covering larger appliances and 12V gear at onceB2.
Scored 8.7/10, it's framed as the most cost-efficient path to serious LFP capacity in 2026 for buyers who don't need rugged or waterproof featuresB4. The trade-off is exactly that: no IP65 sealing and half the solar input of the Ultra — but for indoor and wall-charged use, it delivers the same battery for $300 less.
“The world's lightest 1.5kWh LFP power station at about 32 lbs — class-leading weight is one of its defining features.”
Sources
backuppowerhub.com · jackery.com · portablepowernerd.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- IP65 ruggedness (unique at its price), fast recharge, and the 4,000-cycle LFP battery are the standout praise; it is a newer CES-2026 launch so long-term owner data is thin. [Explorer 1500 Ultra · 3 entries]
- Class-leading light weight, a versatile 7-port layout, fast ~64-minute charging, and the lowest cost-per-watt in its class are the consistent praise. [Explorer 1500 v2 · 3 entries]
- A1
“Built around a 1,536Wh LFP battery with a true IP65 dustproof and water-resistant rating — unique in its price bracket — and a fully sealed titanium-alloy multi-layer cooling structure; totally protected against dust, and resistant to low-pressure water jets, heavy rain, and splashes.”
backuppowerhub.com / gearbrain.com — Explorer 1500 Ultra review · 2026 · [positive]
- A2
“Weighs about 38 lbs, which Jackery claims is up to 53% lighter than comparable competitor units of similar capacity.”
protoolreviews.com / jackery.com — Explorer 1500 Ultra · 2026 · [positive]
- A3
“1.5-hour AC recharge via ChargeShield 2.0, with a 4,000-cycle LFP battery and a 5-year warranty.”
backuppowerhub.com / thesolarlab.com — Explorer 1500 Ultra review · 2026 · [positive]
- A4
“Reviewers score it 9.1/10; its three defining strengths are the IP65 certification, a 1.5-hour AC recharge, and the 4,000-cycle LFP battery with a 5-year warranty.”
thesolarlab.com / backuppowerhub.com — Explorer 1500 Ultra review · 2026 · [positive]
- B1
“The world's lightest 1.5kWh LFP power station at about 32 lbs — class-leading weight is one of its defining features.”
backuppowerhub.com / jackery.com — Explorer 1500 v2 review · 2026 · [positive]
- B2
“Seven simultaneous outputs is genuinely useful: three AC outlets cover larger appliances, dual USB-C ports support fast charging for phones and laptops, and the DC car output handles 12V accessories without burning an AC outlet.”
portablepowernerd.com / backuppowerhub.com — Explorer 1500 v2 review · 2026 · [positive]
- B3
“At $699 it's the lightest, fastest-charging, and lowest cost-per-watt 1.5kWh LFP station on the market, undercutting comparable LFP units, with a roughly 64-minute full charge.”
backuppowerhub.com — Explorer 1500 v2 review · 2026 · [positive]
- B4
“Earns 8.7/10; for buyers who don't need rugged or waterproof features, it's the most cost-efficient path to serious LFP capacity in 2026.”
backuppowerhub.com / portablepowernerd.com — Explorer 1500 v2 review · 2026 · [positive]
Research compiled July 12, 2026.
Who Should Buy Which
Buy the Explorer 1500 Ultra if you…
If neither fits
Both are sealed 1,536Wh units that a weekend of camping (2,100Wh) or an 8-hour blackout (1,645Wh) overruns, and neither expands — if you need more, step up to a larger or expandable station. For a CPAP, a workday, or a tailgate, either handles it.
The Bottom Line
For most buyers, the Jackery Explorer 1500 v2 is the smarter buy, and the logic is simple: it's the same 1,536Wh LFP battery as the Ultra — same cycles, noise, and UPS — for $300 less, and it actually beats the Ultra on weight (the world's lightest 1.5kWh unitB1), output (2,000W), and charging speed (~64 minB3). It's cheaper to own, too, and reviewers' pick for cost-efficient LFP capacityB4.
The Explorer 1500 Ultra earns its premium in one clear scenario: rugged, outdoor, or solar-heavy use. Its IP65 dustproof, water-resistant bodyA1 and double the solar input (800W vs 400W) are real upgrades for jobsites, boats, or off-grid setups. If that's you, the extra $300 is well spent; if you'll charge from the wall and use it indoors or covered, the lighter, cheaper v2 is the same core unit for less.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Jackery Explorer 1500 Ultra or 1500 v2 — which should I buy?
The Explorer 1500 v2 for most buyers. It shares the Ultra's 1,536Wh battery, 4,000 cycles, and 30dB noise but costs $300 less ($699 vs $999), weighs 6.6 lbs less (the world's lightest 1.5kWh LFP station), pushes more output (2,000W vs 1,800W), and charges faster (~64 min). The 1500 Ultra adds a rugged IP65 body and double the solar (800W vs 400W). Buy the v2 unless you need weatherproofing or heavy solar.
What does the extra $300 for the Ultra buy?
Exactly two things: a true IP65 dustproof, water-resistant body unique at its price, and double the solar input (800W vs the v2's 400W). That's it — capacity, cycles, noise, UPS, and warranty are identical, and the v2 actually beats the Ultra on output, weight, charging speed, and price. If you'll use the unit outdoors or charge heavily from solar, the Ultra's premium is justified; if not, you're paying for features you won't use.
Which is the better value?
The Explorer 1500 v2, clearly. At $699 it's $300 cheaper than the Ultra for the same 1,536Wh battery, and reviewers call it the lowest cost-per-watt 1.5kWh LFP station on the market — cheaper to own too ($0.11 vs $0.16 per lifetime kWh). It's also lighter, higher-output, and faster-charging. Unless you specifically need the Ultra's ruggedness or solar, the v2 is the far more economical choice.
Do I need the Ultra's IP65 rating?
Only if the unit will be exposed to dust or water. IP65 means the Explorer 1500 Ultra is totally dustproof and resistant to heavy rain and splashes — genuinely useful for jobsites, boats, or rough outdoor use. If you'll run it indoors, in a car, or under cover, the unsealed Explorer 1500 v2 is fine, and it saves you $300 while weighing less and charging faster. Match the rating to where you'll actually use it.
Related comparisons
Where to buy
Jackery Explorer 1500 Ultra
$999.00
$999.00 list · direct from Jackery
Jackery Explorer 1500 v2Pick
$699.00
$699.00 list · direct from Jackery
Prices may vary by retailer and are subject to change.