One folding panel in two power tiers: the SP200 and SP220 share the same 2,035 × 600 mm sheet, the same folded size and the same 7.2 kg net weight. Unfolded 2,035 × 600 × 2 mm · folded 505 × 600 × 17 mm · 7.2 kg net.
Both panels come off the same 2,035 × 600 × 2 mm sheet, fold to the same 505 × 600 × 17 mm and weigh the same 7.2 kg. The difference is the cell batch: 24% cell efficiency against 25%, which is where the extra 20W comes from without a bigger panel or a heavier case.
SP200 against SP220 — what the price difference buys
Specification
SP200
SP220
Price
$299
$399
Price per rated watt
$1.50/W
$1.81/W
Rated power
200W
220W
Cell efficiency
24%
25%
Dimensions (unfolded)
2,035 × 600 × 2 mm
2,035 × 600 × 2 mm
Folded size
505 × 600 × 17 mm
505 × 600 × 17 mm
Net weight
7.2 kg
7.2 kg
Put plainly: +10% rated power for +33% price, and $1.81/W against $1.50/W — about 21% more per watt. The SP220 earns its price when the panel count and the packing space are fixed; the SP200 stays the cheaper route to watts if you have room for another panel.
Full specifications
Panel figures reference STC: 25°C cell temperature, 1,000W/m² irradiance, AM1.5 spectrum. Every row carries a value in both columns — where the two read the same, it is physically the same part on either model.
200W / 220W Folding Solar Panel — documented specifications
Specification
SP200
SP220
Model No.
SP200W
SP220W
Rated power (Pmax)
200W
220W
Maximum power voltage (Vmp)
18.00V
18.00V
Maximum power current (Imp)
11.10A
12.22A
Open-circuit voltage (Voc)
20.40V
21.06V
Short-circuit current (Isc)
11.99A
12.81A
Cell type
Monocrystalline
Monocrystalline
Cell efficiency
24%
25%
Surface encapsulation
ETFE lamination
ETFE lamination
Fold quantity
4-fold
4-fold
Dimensions (unfolded)
2,035 × 600 × 2 mm
2,035 × 600 × 2 mm
Dimensions (folded)
505 × 600 × 17 mm
505 × 600 × 17 mm
Net weight
7.2 kg
7.2 kg
Gross weight
9.6 kg
9.6 kg
Packing size
74 × 65.5 × 12 cm
74 × 65.5 × 12 cm
Connector type
MC4 IP67 connectors
MC4 IP67 connectors
Output lead
1m integrated factory-fitted MC4 cable
1m integrated factory-fitted MC4 cable
Included adapter cable
DC5521, Anderson, XT60, Aviation M16
DC5521, Anderson, XT60, Aviation M16
IP rating
IP67
IP67
Operating temperature
−20°C to 60°C
−20°C to 60°C
Optimal temperature
77°F (25°C)
77°F (25°C)
Test condition (STC)
25°C, 1,000W/m², AM1.5
25°C, 1,000W/m², AM1.5
Warranty
1 year
1 year
Specifications shown are the documented configuration used for this guide. Ratings can vary by market; confirm the exact store listing before purchase.
Why neither panel reads its rated watts
Both ratings are measured under Standard Test Conditions (STC): 1,000 W/m² irradiance, a 25°C cell temperature and a fixed laboratory sun spectrum. Outdoors, four factors pull the real input down from either label — none of them is a defect, and they cost the same percentage on both panels.
Cell temperature. Monocrystalline cells lose roughly 0.35–0.45% of output for every °C above 25°C. A panel in direct sun on a warm day easily reaches 50–60°C at the glass, which alone cuts output by 9–16%.
Sun angle and irradiance. STC assumes direct overhead sun. Low winter sun, haze and thin clouds reduce what reaches the cells — hazy or partly cloudy conditions deliver 20–60% of rated watts, which is why the matrix below starts well under the labels.
Shading and soiling. Partial shade from a branch, roof rack or antenna can cut string output sharply, and dust or pollen on the glass alone reduces production by 5–20%.
System losses. Cable resistance, connectors and the charge controller's conversion add a further 3–8%, and charging the battery itself wastes around 15% of the energy that arrives.
Under good conditions — cool, clear and well-aimed — expect roughly 70–85% of rated watts at midday, which is why the matrix below starts well under the labels. Solar works best as a daylight top-up with an AC recharge plan behind it.
Full-charge time by power station
Both panels refill every SoreinPower station — but the meter depends entirely on the light. The matrix shows estimated full-charge time under the four real-world conditions the SP200 is measured in, plus the SP220's clear-midday column, using 85% panel-to-battery efficiency.
Estimated full-charge time by station and light condition
Power station
Battery
SP200
SP220
Clear midday sun 150–170W
Clear sky · hot panel 120–140W
Thin clouds / low sun 60–100W
Overcast / shade 10–40W
Clear midday 165–190W
P600
481Wh
3.3–3.8 hours
4–4.7 hours
5.7–9.4 hours
14 hours+
3.0–3.4 hours
P1200
1,152Wh
8–9 hours
9.7–11.3 hours
14–23 hours
Effectively stalled
7.1–8.2 hours
P2400
2,160Wh
15–17 hours
18–21 hours
25–42 hours
Effectively stalled
13.4–15.4 hours
G2400
2,400Wh
17–19 hours
20–24 hours
28–47 hours
Effectively stalled
14.9–17.1 hours
G4800
4,800Wh
33–38 hours
40–47 hours
56–94 hours
Effectively stalled
29.7–34.2 hours
G7200
7,200Wh
50–56 hours
60–71 hours
85–141 hours
Effectively stalled
44.6–51.3 hours
G9600
9,600Wh
66–75 hours
81–94 hours
113–188 hours
Effectively stalled
59.4–68.4 hours
Only the clear-midday column is shown per panel: the SP220 runs roughly 10% faster in all four conditions, so the hot, thin-cloud and overcast columns scale by the same ratio. "Effectively stalled" means the panel barely covers idle drain, let alone refills the battery. P2400 and G Series models recharge roughly twice as fast with the 400W panel. The star marks the stations we recommend pairing with these panels.
Wiring the panels into an array
Series strings add voltage, not current: a string stays at one panel's Imp (11.10A on the SP200, 12.22A on the SP220), so the 20A input limit only bites in parallel. What ends a string is total open-circuit voltage — 20.40V Voc on the SP200 and 21.06V Voc on the SP220 — together with total module watts. Older documentation quoted a 60V ceiling for the main base; the current specification lists 11–100V, and that is what this table uses.
Series string against the G Series main base (11–100V / 20A / 1,000W)
Panels in series
SP200 total Voc
SP220 total Voc
Total rated power
Verdict
2
40.80V
42.12V
400W / 440W
Fits
3
61.20V
63.18V
600W / 660W
Fits
4
81.60V
84.24V
800W / 880W
Fits
5
102.00V
105.30V
1,000W / 1,100W
Over 100V and over 1,000W (SP220)
Two panels in parallel pull 22.20A Imp / 23.98A Isc on the SP200, 24.44A Imp / 25.62A Isc on the SP220, past the 20A main-base input — a parallel array needs its own controller. The P Series ceiling arrives sooner: P600 stops at 50V and P1200 / P2400 at 60V, so two panels is the longest string on any of them. The P1200 also caps solar current at 12A: one panel stays inside it (the SP220's 12.22A Imp only reaches that figure on the STC datasheet, not in real light), but two in parallel do not.
Power stations the panels pair with
P600 and P1200 take either panel as the main charge; on P2400 and the G Series these panels are a daylight top-up, and the SP220 panel is the faster route.
Grab-and-go power
P600
The light-duty choice for quiet weekends, charging stations and small essentials.
Capacity
481Wh
AC output
600W
Best forCamping, camera kit and CPAP without humidifier — anything under 600W
Straight answers on output, charging, weather, compatibility and care.
How much energy does a panel produce in a day?
About 560Wh from the SP200 and 620Wh from the SP220 on a typical strong day. The math is rated watts × peak sun hours × 0.7 real-world efficiency, and 4 peak sun hours is what clear weather usually gives you. Either number refills a P600 with room to spare; winter and overcast stretches cut them further.
Why doesn't my panel output its rated watts?
In good midday sun expect 150–170W from the SP200 and 165–190W from the SP220. Both labels are Standard Test Conditions ratings measured in a laboratory with 25°C cells. Real output depends on cell temperature, sun angle, shading and system losses — the full explanation sits above this section.
Do I need a separate charge controller?
No. Both panels feed a SoreinPower station's built-in MPPT charge controller. A separate controller is only needed when charging a raw 12V battery directly.
Can I run devices while the panel charges the station?
Yes. Most SoreinPower stations support pass-through use. Solar refills the battery while the station runs your devices, and the battery buffers the sun's variation either way.
Does it work on cloudy days?
Yes, at reduced input. Thin clouds and low-angle sun deliver 60–100W from the SP200 and 65–110W from the SP220; heavy overcast drops to 10–40W and 10–45W respectively. Either panel still contributes, but stops being a same-day full-recharge plan.
How water-resistant are the panels?
Both carry an IP67 rating on the panel surface, so rain and splashes are covered. Do not submerge them, and keep connectors and cable ends dry. The folding seams and junction points are the parts to protect. Let the panel dry before folding it away.
How do I clean and store a panel?
Wipe the surface with a soft cloth and fresh water. Dust and pollen alone cut output 5–20%. Store it folded and dry, keep grit out of the folds and never pack sharp objects against the surface. The operating range is −20°C to 60°C.
Can the panels charge power stations from other brands?
Yes, if their solar input window accepts the output. Both run at 18.00V Vmp — 11.10A Imp for the SP200, 12.22A Imp for the SP220 — through a factory-fitted 1m MC4 lead, and the included adapter cable covers DC5521, Anderson, XT60 and aviation M16 plugs. Confirm the target station's input specs before buying.
What are the dimensions and weight?
Both panels are the same sheet: unfolded 2,035 × 600 × 2 mm, folded 505 × 600 × 17 mm in a 4-fold layout, 7.2 kg net (9.6 kg gross). The IP67 ETFE surface and monocrystalline cells are built for repeated folding; keep the folds dry and free of grit to protect the hinges.
Should I buy the SP200 or the SP220?
They are the same panel with different cell batches, so the choice is about how many panels you can carry. The SP220 returns 10% more rated power from the identical folded size but costs more per watt — today's gap is in the price table above. Pick the SP220 when the panel count and packing space are fixed; pick the SP200 when you have room for a second panel.
Does the SP220 work with the P1200?
Yes. The P1200 accepts up to 400W of solar at 12–60V and a 12A input. The SP220's 12.22A Imp only brushes that ceiling on the STC datasheet — in real light the panel runs 165–190W, which is 9.2–10.6A at 18V, comfortably inside the limit. A single SP220 on a P1200 charges in roughly 7.1–8.2 hours of clear midday sun.
How much faster does the SP220 charge the G9600?
Roughly 10%. The G9600 refills in 59.4–68.4 hours in clear midday sun with the SP220, against 66–75 hours with the SP200 — and the same ratio holds in the hotter, thinner-cloud and overcast conditions.
