What Can 370Wh of Solar Energy Do at a Campsite?
Understand the reported 370Wh daily average from LINKSOLAR’s 120W tent, with phone, light, and fan examples plus clear test limitations.
LINKSOLAR reports an average of about 370 watt-hours per day from its 120W solar tent during a 45-day test in Dongguan, China, measured after the junction box. That is a useful reference for planning phone, light, and small-fan use. It is a test-period average, not a guaranteed daily yield at your campsite.
What does the 370Wh figure actually measure?
Watts and watt-hours answer different questions. The roof's 120W rating describes the combined rated power of its panels. Watt-hours measure energy collected over time. Multiplying 120W by the number of daylight hours would assume full rated output throughout those hours, which is not how a tent roof behaves outdoors.
| Test detail | Information provided by LINKSOLAR |
|---|---|
| Location | Dongguan, Guangdong, China |
| Duration | 45 consecutive days |
| Measurement point | Output after the junction box |
| Equipment | Dedicated electronic test equipment |
| Reported result | Approximately 370Wh per day on average |
| Source | Brand-reported test information; not independent certification |
This article summarizes the test information supplied by LINKSOLAR. It does not present a downloadable daily log or a third-party test report. The exact dates, daily weather records, and instrument model are not included here. Those details would help readers compare the test with their own conditions; the average alone cannot predict output in a different season or location.
Allow for energy lost after the junction box
Charging a power bank, storing energy, and delivering it to another device introduce losses. For a simple worked example, assume 80% overall efficiency after the junction box:
370Wh × 0.80 = 296Wh available at the device side.
The 80% value is an illustration, not a measured efficiency for this tent or every power station. The 296Wh figure is a calculation, not another test result. Actual losses depend on the charging path, battery, cables, temperature, and connected equipment.
What could a 296Wh energy budget cover?
Each row below uses the entire hypothetical 296Wh budget for one purpose. The results cannot be added together.
| Example load | Calculation | Approximate energy equivalent |
|---|---|---|
| A phone battery rated 5,000mAh at 3.85V | 5Ah × 3.85V = 19.25Wh; 296 ÷ 19.25 | 15 full battery charges |
| A power bank with 10,000mAh cells at 3.7V | 10Ah × 3.7V = 37Wh; 296 ÷ 37 | 8 full battery charges |
| A light drawing a steady 5W | 296Wh ÷ 5W | 59 hours |
| A fan drawing a steady 10W | 296Wh ÷ 10W | 29 hours |
These are energy equivalents, not measured charging counts or runtime promises. The power-bank example estimates energy stored in its cells; delivering that energy onward to a phone would involve another conversion. Real devices also change their power draw during use.
A port's power limit still matters. The tent's USB-C output is rated up to 18W. Having enough energy over a day does not make that port capable of delivering a higher charging wattage.
A mixed budget for an evening at camp
Suppose four phones each need 19.25Wh, a 5W light runs for eight hours, and a 10W fan runs for eight hours:
- Phones: 4 × 19.25Wh = 77Wh.
- Light: 5W × 8 hours = 40Wh.
- Fan: 10W × 8 hours = 80Wh.
- Total device-side energy: 197Wh.
That fits within the illustrative 296Wh budget. It still depends on collecting sufficient energy, having compatible storage with enough usable capacity, and using suitable outputs. The example does not guarantee that these devices will run every night. Start your trip with charged storage and allow a reserve for poor weather.
For your own plan, use the watt-hour rating printed on each battery where available. For a steady load, multiply its wattage by the hours you expect to use it. Add the loads, then account for storage and conversion losses appropriate to your equipment.
Why will another campsite produce a different result?
The twelve panels face four directions. As the sun moves, some roof sections receive more direct light than others. Trees, clouds, surface dirt, temperature, and roof orientation can reduce production. The Dongguan result gives a sense of scale, but it does not replace a local measurement.
Common questions
Is 370Wh the tent's battery capacity?
No. The tent does not contain a solar storage battery. About 370Wh is the reported average daily energy measured during the brand's 45-day test.
Can I use the solar energy at night?
Yes, if you stored it during the day in a compatible external power bank or power station. The roof itself does not produce usable solar power after sunset, and the pump battery cannot substitute for that external storage.
Can the tent power an electric kettle or heater?
The junction box is not designed to power those appliances directly. It has no AC outlet; its DC5521 output is rated up to 50W and each USB output up to 18W. High-power heating appliances exceed those port limits.
Will it really charge my phone 15 times?
That number is a calculation using a 19.25Wh phone battery and the hypothetical 296Wh budget. Your phone, charging losses, sunlight, and use while charging will change the result. It is not a tested charging-count claim.
Read how the 120W charging system works, compare the 52W and 120W tents, or see our guide to planning camp power after sunset.
Source: LINKSOLAR's supplied description of its 45-day Dongguan test. All device examples are calculations using the stated assumptions. Reviewed September 19, 2026.