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I Had No Idea These Were So Good!

Top Picks

Best Performance

Highest sunny output + top overall score

FlexSolar

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Average Finish: 3.5

Purchased for: $80

Made In: China

Top overall (average finish 3.5). Highest sunny output in testing. Would not start charging below ~5V battery voltage. Float behavior ran a bit high (cut-in 14.1V, cut-out 14.4V). Rubberized coating: perfect scratch score. Minor dent on impact. Best efficiency called out: ~0.12 W/sq-in and ~15.35 W/lb.

Won the overall scorecard (avg finish 3.5) and produced the most power in hot sunny conditions (~21.52W). Note: won’t start charging below ~5V.

Best Value

Strong across tests at a mid price

Grecell

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Average Finish: 3.7

Purchased for: $50

Made In: China

25W-claimed. Strong overcast average and solid sunny output. Float control worked (cut-in 13.3V, cut-out 14.1V). Rubberized coating: perfect scratch score (no damage from picks). Finished 2nd overall (average finish 3.7) and was the reviewer’s personal pick around $50.

Reviewer’s personal pick around $50. Finished 2nd overall (avg finish 3.7) with solid float control (13.3V in / 14.1V out) and perfect scratch score.

Runner-up

Best overcast average output

NXQWLL (NX)

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Purchased for: $59

Made In: China

20W-claimed semi-flex panel. Best overcast average output. Float control: cut-in 13.8V, cut-out 14.5V. Scratch resistance was poor (damage at pick #3). Reverse-polarity test produced a significant spark and very hot wires (did not pass as cleanly as most). Impact left a dent but still functioned.

Highest overcast average (~10.58W). Tradeoffs: poor scratch resistance (pick #3) and reverse-polarity test caused very hot wires.

Name	Price ($)	Average Finish	Link	Made In
SHASUXTING	$18.00		Search on Amazon	Budget 30W-claimed panel. Overcast output was very low. Did not stop charging an already overcharged battery (~15.5V), so float control/overcharge behavior was poor. Scratch resistance: first damage at pick #5. Impact test left visible damage.
Hoysicy	$28.00		Search on Amazon	20W-claimed panel with controller and accessories. Strong output in sun, but charge controller overcharged a battery (kept charging around ~16.2V), so float behavior failed in testing. Scratch resistance: damage at pick #8. Impact resistance was good.
Newpowa	$30.00		Search on Amazon	20W-claimed with suction cups and included leads. Underperformed vs top panels in overcast. Overcharged a fully-charged battery (>15V) and did not cut off. Scratch resistance: damage at pick #6. Impact test left a large dent.
VOLT HERO	$30.00		Search on Amazon	20W-claimed with 10A controller. Float control behaved correctly in testing (cut-in 13.1V, cut-out 14.1V). Needed ~4V battery voltage before it began charging. Scratch resistance: damage at pick #9. Impact resistance was excellent.
TBER	$30.00		Search on Amazon	20W-claimed with controller and leads. Strong overcast output. Did not stop charging an overcharged battery (~15.5V), so float/overcharge behavior was poor. Scratch resistance: damage at pick #9. Impact resistance was excellent.
EBL	$25.00		Search on Amazon	25W-claimed foldable style with suction cups. Float control worked (cut-in 12.6V, cut-out 13.8V). Rubberized coating: perfect scratch score (no damage from picks). Impact resistance was good.
SOLPERK	$50.00		Search on Amazon	20W-claimed with mount bracket and tempered glass. Began charging at ~5V battery voltage. Float cut-in 13.7V, but cut-out reached ~15.2V (high). Scratch resistance: damage at pick #8. Failed impact test (panel ruined).
NXQWLL (NX)	$59.00		Search on Amazon	20W-claimed semi-flex panel. Best overcast average output. Float control: cut-in 13.8V, cut-out 14.5V. Scratch resistance was poor (damage at pick #3). Reverse-polarity test produced a significant spark and very hot wires (did not pass as cleanly as most). Impact left a dent but still functioned.
TogoPOWER	$60.00		Search on Amazon	12V charger with claimed MPPT behavior; struggled in overcast testing with low voltage (~10V) not enough to charge a car battery in that scenario. Float control matched NX (cut-in 13.8V, cut-out 14.5V). Scratch resistance: damage at pick #8. Impact resistance was good.
SUNER POWER	$86.00		Search on Amazon	20W-claimed with 3-stage algorithm. Strong overcast average (3rd). Began charging at ~5V battery voltage. Float control: cut-in ~13.8V, cut-out ~14.3V. Scratch resistance: damage at pick #8. Impact resistance was good. (Transcript contained conflicting weight; pounds value used for grams conversion.)
Schumacher	$112.00		Search on Amazon	Large, heavy panel with claimed 15W. Began charging only if battery was at least ~3.3V. Float control cut-in 12.3V (low) and cut-out 14.4V. Scratch resistance: visible scratches at pick #7. Impact resistance was good but output lagged competition.
PulseTech	$265.00		Search on Amazon	Most expensive. Performed worst in overcast output. Reverse-polarity test caused a hot spark and wires heated quickly (did not pass as cleanly as most). Scratch resistance was poor (damage at pick #3). Impact left a dent. Float cut-in observed at 13.8V but cut-out was not observed during testing (appeared to keep charging).
FlexSolar	$80.00	3.5	Search on Amazon	Top overall (average finish 3.5). Highest sunny output in testing. Would not start charging below ~5V battery voltage. Float behavior ran a bit high (cut-in 14.1V, cut-out 14.4V). Rubberized coating: perfect scratch score. Minor dent on impact. Best efficiency called out: ~0.12 W/sq-in and ~15.35 W/lb.
Grecell	$50.00	3.7	Search on Amazon	25W-claimed. Strong overcast average and solid sunny output. Float control worked (cut-in 13.3V, cut-out 14.1V). Rubberized coating: perfect scratch score (no damage from picks). Finished 2nd overall (average finish 3.7) and was the reviewer’s personal pick around $50.