I Had No Idea These Were So Good!

Project Farm Jan 18, 2026 512 Thousand views
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Description

Solar car battery chargers compared for performance charging a car battery in overcast and sunny conditions, reverse polarity testing, impact resistance, maximum watts, minimum voltage to begin charging, float charge cut in and cut out voltage. PulseTech, Schumacher, SUNER POWER, FlexSolar, TogoPOWER, NXQWLL, SOLPERK, Grecell, EBL, Newpowa, TBER, VOLT HERO, Hoysicy, and SHASUXTING. I purchased all of the solar battery chargers to ensure an unbiased review. So, thank you for supporting the channel! ➡ Project Farm Extra: https://www.youtube.com/@ProjectFarmExtra ➡ Thank you very much for supporting the channel through Patreon: https://www.patreon.com/projectfarm ➡ Thank you for supporting the channel through memberships: https://www.youtube.com/channel/UC2rzsm1Qi6N1X-wuOg_p0Ng/join ➡ An easy way to find past videos along with products tested: http://bit.ly/2FCrBpk A big thanks to Jim for putting this together. ➡ Facebook Project Farm: https://www.facebook.com/people/Project-Farm/100084004365959/ ➡ TikTok: https://www.tiktok.com/@realprojectfarm?_t=8oA53IvDBz5\u0026_r=1 ➡ Merch: project-farm.com ➡ Click here if you'd like to subscribe: https://www.youtube.com/channel/UC2rzsm1Qi6N1X-wuOg_p0Ng?sub_confirmation=1 ➡ As an Amazon Associate I earn from qualifying purchases. ➡ Products Tested In This Video (in no particular order): FlexSolar: https://amzn.to/4lzCZkH Grecell: https://amzn.to/4jLjdCW Hoysicy: https://amzn.to/46omN1e NXQWLL: https://amzn.to/44sb3Z1 TBER: https://amzn.to/4l8Stw2 VOLT HERO: https://amzn.to/44saT3R EBL: https://amzn.to/4l8SoIK SUNER POWER: https://amzn.to/4kmF56C TogoPOWER: https://amzn.to/4kmEpOv SOLPERK: https://amzn.to/4eAuMuj Newpowa: https://amzn.to/44G5WWt PulseTech: https://amzn.to/4lbuL2x Schumacher: https://amzn.to/44zIY2d SHASUXTING: https://amzn.to/40AhbNA Solar Panel Tester: https://amzn.to/45PdgQO Videography Equipment: Canon EOS R6 Mark II: https://amzn.to/4aErF18 Canon 70D Camera: https://amzn.to/31b5Gy0 Azden Microphone: https://amzn.to/34d3DLE Go Pro Bundle: https://amzn.to/3JJkqNO This video is only for entertainment purposes. If you rely on the information portrayed in this video, you assume the responsibility for the results.

Products Reviewed (14)

Solar Battery Charger with Built-in Charge Controller
Winner

FlexSolar

Solar Battery Charger with Built-in Charge Controller

$80.00

#1 4.8

Best Overall - Came out on top with best average finish of 3.5. Most efficient at 0.12 watts per square inch and 15.35 watts per pound. Produced 21.52 watts in sunny conditions. Has rubberized coating with perfect scratch resistance. Will not charge batteries under 5 volts.

25W Solar Battery Charger
Winner

Grecell

25W Solar Battery Charger

$50.00

#2 4.6

Best Value - Finished in second place with average finish of 3.7. Can charge batteries below 1 volt. Better float charge cut-in/cut-out points than FlexSolar. Performed well in most categories. Reviewer's choice for the price at $50.

20W High Power Semiflexible Solar Charger

NX

20W High Power Semiflexible Solar Charger

$59.00

#3 4.2

Led in overcast conditions at 10.58 watts average. Very efficient at 0.1 watts per square inch. Poor scratch resistance (damaged by #3 pick). Experienced significant spark during reverse polarity test. Lightweight at 1.15 lbs.

20W Solar Battery Trickle Charger Pro

SUNER POWER

20W Solar Battery Trickle Charger Pro

$86.00

#4 4.0

Heaviest at 4.59 lbs. Has three-stage charging algorithm (bulk, absorption, float). Performed better than average at 7.33 watts lying flat. Good impact resistance. Built-in intelligent controller.

20W Monocrystalline Battery Maintainer

Hoysicy

20W Monocrystalline Battery Maintainer

$28.00

#5 3.5

Good solar production at 16.49 watts in sunny conditions. Heavy at 3.52 lbs. Charge controller failed - overcharged battery to 16.2 volts without stopping. Not recommended despite good solar performance.

20W Solar Battery Charger with 10A Controller

TBER

20W Solar Battery Charger with 10A Controller

$30.00

#6 3.8

Good overcast performance at 6.37 watts lying flat. Excellent scratch resistance (survived #9 pick). Good impact resistance. Failed float charge test - overcharged battery to 15.5 volts without stopping.

20W Monocrystalline Solar Charger

VOLT HERO

20W Monocrystalline Solar Charger

$30.00

#7 4.1

Proper float charge operation with 13.1V cut-in and 14.1V cut-out. Good scratch resistance (survived #9 pick). Heavy at 3.32 lbs. Performed at 15.55 watts in sunny conditions.

25W Portable Foldable Solar Panel

EBL

25W Portable Foldable Solar Panel

$25.00

#8 3.9

Good float charge operation (12.6V cut-in, 13.8V cut-out). Perfect scratch resistance with rubberized coating. Underperformed at only 14 watts vs 25W rating in sunny conditions. Can attach to windshield with suction cups.

12V Battery Charger with Built-in MPPT

TogoPOWER

12V Battery Charger with Built-in MPPT

$60.00

#9 2.5

Severely underpowered at only 2.68 watts - not enough to charge car battery. Voltage too low at around 10 volts. Claims IP67 waterproof and MPPT technology but failed basic performance tests.

20W Solar Battery Trickle Charger

SOLPERK

20W Solar Battery Trickle Charger

$50.00

#10 3.2

High cutout voltage at 15.2V which seems too high. Poor impact resistance - ruined by tool drop test. Performed at 14.51 watts vs 20W rating. Includes adjustable mount bracket.

20W Solar Panel Car Battery Maintainer

Newpowa

20W Solar Panel Car Battery Maintainer

$30.00

#11 3.0

Lightweight at 1.64 lbs. Poor solar production at only 3.35 watts in overcast, 14 watts in sunny conditions. Failed float charge test - overcharged battery. Has 8 suction cups for installation.

15W Solar Battery Charger

Schumacher

15W Solar Battery Charger

$112.00

#12 2.8

Massive and heavy at 10.86 lbs but only 15W rating. Poor performance at 3.08 watts lying flat, 11.86 watts in sunny conditions. Good impact resistance. Poor value for the size and weight.

12W Solar Battery Charger

PulseTech

12W Solar Battery Charger

$265.00

#13 2.0

Most expensive at $265 but worst performance at 0.12 watts in overcast, 11.97 watts in sunny conditions. Claims to be 'virtually indestructible' but poor scratch resistance. Never reached cutout voltage, continued charging at 15.5V.

30W Solar Car Battery Charger

SHASUXTING

30W Solar Car Battery Charger

$18.00

#14 2.2

Least expensive at $18 but poor performance. Only 2.22 watts in sunny conditions despite 30W rating. Poor durability - easily scratched and damaged by impact. Failed float charge test - overcharged battery to 15.5V.