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Goal Zero Tank Pro 4000 Review
3,994Wh of storage, LiFePO4 cells. Listed at $1,999.95 at Goal Zero.
The Goal Zero Tank Pro 4000 is a extra large 2,600wh+ unit holding 3,994Wh. At $0.50 per watt-hour it is priced about where the rest of the band sits. It uses LiFePO4 cells, so it is built to be kept rather than replaced.
Manufacturer price at the time of writing. This link is not a paid placement.
Computed from this unit’s published specification, not from a manufacturer claim. Method and the full catalogue comparison are in our power station price index.
What the Goal Zero Tank Pro 4000 will run, and for how long
Runtimes below are calculated from the 3,994Wh rated capacity, derated to 85% for AC loads and 92% for USB and 12V loads to cover inverter and conversion losses. They are arithmetic, not lab measurements, but they are the same arithmetic applied to every unit we track, so the comparison holds.
| Load | Estimated runtime |
|---|---|
| Phone charge (12Wh) | 306 charges |
| Wi-Fi router (10W) | 339 hr |
| LED work light (10W) | 367 hr |
| CPAP, humidifier off (40W) | 85 hr |
| Laptop (60W) | 57 hr |
| 12V portable fridge (45W avg) | 75 hr |
| 55-inch TV (90W) | 38 hr |
Real figures land below these. A fridge cycles rather than drawing continuously, and cold weather costs a lithium pack usable capacity, so treat the table as the ceiling rather than the expectation.
Goal Zero Tank Pro 4000 specifications
Manufacturer figures, gathered so you can read them against everything else we track rather than against the marketing page they came from.
| Capacity | 3,994Wh |
| Cell chemistry | LiFePO4 |
| Weight | 80.3 lb |
| Warranty | 5 years |
| Price at Goal Zero | $1,999.95 |
| Cost per watt-hour | $0.50 |
How the Goal Zero Tank Pro 4000 compares
The closest units we track from other manufacturers in the same band, matched on capacity rather than on price.
| Goal Zero Tank Pro 4000 | BLUETTI Elite 400 | ALLPOWERS R4000 | |
|---|---|---|---|
| Capacity | 3,994Wh | 3,840Wh | 3,456Wh |
| Output | — | — | 3,600W |
| Cycle life | — | — | 3,500 cycles |
| Weight | 80 lb | — | 99 lb |
| Price | $1,999.95 | $1,299 | $1,899 |
| Cost per watt-hour | $0.50 | $0.34 | $0.55 |
Where the Goal Zero Tank Pro 4000 sits in its band
We track 19 units in the extra large 2,600wh+ band with both a price and a published capacity. They run from $799 to $5,998.95, and from 1,536Wh to 5,120Wh. On cost per watt-hour the Goal Zero Tank Pro 4000 ranks 8 of 19, where 1 is the cheapest capacity in the band. That is mid-table: neither the bargain of the band nor the unit you would call overpriced. Ranking on cost per watt-hour deliberately ignores build quality, port selection and warranty, so read it as one input rather than as the answer.
Alternatives to the Goal Zero Tank Pro 4000
Units we track in the same band that are close enough to be genuine substitutes, matched on capacity. Each links to its own review.
- Goal Zero Yeti PRO 4000 review — 3,994Wh, 375W output, listed at $3,999.95, $1 per watt-hour, dearer capacity than the Goal Zero Tank Pro 4000.
- Goal Zero Yeti PRO 8000 review — 3,994Wh, 375W output, listed at $5,998.95, $1.50 per watt-hour, dearer capacity than the Goal Zero Tank Pro 4000.
- BLUETTI Elite 400 review — 3,840Wh, listed at $1,299, $0.34 per watt-hour, cheaper capacity than the Goal Zero Tank Pro 4000.
- ALLPOWERS R4000 review — 3,456Wh, 3,600W output, listed at $1,899, $0.55 per watt-hour, dearer capacity than the Goal Zero Tank Pro 4000.
Who the Goal Zero Tank Pro 4000 suits
It is a sensible buy for whole-circuit backup, extended off-grid stays, and running heavy appliances without rationing them. It is the wrong tool for anyone who needs something genuinely portable, since capacity at this level comes with real weight, and for carrying it any distance on your own, at 80.3 lb.
Goal Zero Tank Pro 4000 questions
How long will the Goal Zero Tank Pro 4000 run a fridge?
A full-size fridge averages about 50W once you account for the compressor cycling on and off. From 3,994Wh, derated to 85% for inverter losses, that is roughly 68 hr on a full charge. A 12V portable fridge draws less and will run considerably longer.
Can the Goal Zero Tank Pro 4000 be charged by solar?
Goal Zero does not publish a maximum solar input for this model. Rather than estimate one, we leave it out. Check the manual that ships with the unit before buying panels for it.
What warranty does the Goal Zero Tank Pro 4000 carry?
Goal Zero covers it for 5 years. Cycle life and warranty are different promises, and the cycle figure is the one that tells you how long the pack stays useful.
Is the Goal Zero Tank Pro 4000 worth it?
At $1,999.95 it works out at $0.50 per watt-hour. It costs less per watt-hour than the median unit in its band, which is the strongest argument in its favour. Read the comparison table above against the two closest rivals before deciding.
What is not published
Goal Zero does not state the rated cycle life, the maximum solar input, the continuous AC output for this model. We list figures rather than estimate them, so those rows stay empty until the manufacturer publishes them. If you need one of them to make the decision, ask Goal Zero directly and hold them to the answer.
How we assess these
Every figure on this page comes from the manufacturer, and every derived number, cost per watt-hour and estimated runtime, is calculated the same way for all 437 products we track. That is what makes the comparison meaningful: we are not scoring units against a private impression of them, we are putting published figures side by side and doing the arithmetic in public. Where a manufacturer stays quiet, we say so rather than filling the gap.