☀️【 CHARGE ANYWHERE 】Convert sunshine into electricity, charge and maintain your 12 volt battery in all seasons. Package includes a 20 watt 12 volt solar panel, an advanced MPPT charge controller to intelligently charge and maintain 12 volt batteries plus a plug and play SAE connection cable for quick connection or disconnection.
☀️【 MULTIPLE COMPATIBILITY 】Perfect portable 12v solar charger for trickle-charging and maintaining various 12 volt batteries like deep-cycle Wet, Gel, Flooded, AGM, Sealed, Lead-acid, Lithium Lifepo4, as well as batteries for cars, motorcycles, RVs, trailers, boats, snow mobiles, lawn mower, tractors, ATVs, gate openers, trolling motors, water pumps etc; Works great for off-grid 12 volt battery charging systems and a variety of DC applications, back-up power and remote power uses.
☀️【 INTELLIGENT CHARGING & FULL PROTECTION 】An advanced MPPT charge controller is included to optimize the performance of charging 12v batteries like AGM,Lithium Lifepo4,Wet,Gel,Flooded,Sealed,Lead-acid batteries of Cars,ATVs,Tractors,Boats,RVs,Campers,Trailers. And also provide full protection against over-charging, short-circuit&reverse polarity to ensure the battery is efficiently and safely charged to 100%. LCD display allows you to monitor the working status of solar panel and battery.
☀️【 HIGH EFFICIENCY 】Made of premium Monocrystalline cells which delivers an effective conversion rate up to 30%. Using low iron tempered, The Monocrystalline cells are protected by low-ion tempered glass, EVA film and durable aluminum frame.the solar panel which can withstand the changing outdoor environment, Great for extended outdoor use.
☀️【 EASY INSTALLATION 】Equipped with a alligator battery clip cable with SAE connector, plug and play, easy to connect or disconnect. SAE connector allows it to works with the most other SAE adapters on the market. Pre-drilled holes on the back of 20w 12v solar panels which can be matched with various solar panel mounting brackets allows faster mounting and securing.
Additional information
Brand
Allto Solar
Material
Aluminum, Glass
Efficiency
High Efficiency
Style
20W Pro + MPPT Charger Controller
Connector Type
Clamp
Included Components
1x SAE to Alligator Clip Cable, 1x 20W Solar Panel Kit, 1x 10A MPPT Charge Controller
AC Adapter Current
10 Amps
Maximum Voltage
12 Volts (DC)
Maximum Power
20 Watts
Product Dimensions
16.5"L x 13.2"W x 0.78"H
Item Weight
4.09 pounds
Manufacturer
Allto Solar
Country of Origin
China
Item model number
AS-SP-20W-M
10 reviews for 20W 12V Solar Panel Kit Battery Maintainer Trickle Charger Pro + Advanced 10A MPPT Charge Controller + SAE Battery Clip Cable for 12 Volt Boat Car…
Rated 5 out of 5
Amazon Customer –
Seems to work well will get more if I have a further need
Rated 4 out of 5
hitpure –
My pickup truck has a short somewhere that I can’t find that drain’s the battery down. since I’ve been using this I always have battery with enough juice to start it.
Rated 1 out of 5
Amazon Customer –
The item does not work. Control panel doesnt work. Zero power.
Rated 4 out of 5
Luis Guzman –
So far I like it ! Will see if it holds up
Rated 5 out of 5
Ronin –
When I first installed this solar panel to my shed and connected the MPPT charge controller to my battery everything was working great. I was getting 80-90 watts charging in good sunlight conditions. But a few days ago I noticed the lights on the charge controller were flashing in sequence 25%-50%-75%-100% over and over. It was perfect conditions for solar charging but still nothing was going to my battery which had dropped to less than 12v SOC. I disconnected the charge controller and connected the panel lead straight into my Bluetti power station. The panel was producing 88+ watts going into the Bluetti. So, the panel works great, but the charge controller is junk. UPDATE: The seller reached out to me and made things right. After a couple of emails to determine the issue, the seller sent a new charge controller quickly. My system is rocking and rolling again. SUPER customer service.
Rated 5 out of 5
Matt –
awesome
Rated 5 out of 5
Ronald Mendleski –
Worked perfectly for my RV….. charged my 300 amp hour lithium battery bank perfectly after trying to other solar panels that didn’t work as advertised!!!
Rated 5 out of 5
Ronin –
This is a real 20W charging panel, and these MPPT charge controllers are finally smart and only turn on if polarity correct, how many controller simply release the magic smoke if reversed.
The only down side of the panel is it need full sun NO SHADOWS, but if a cloud passes over head yes you will loose power but once the sky is clear the system just reboots and starts charging again.
excellent power output, it is producing 3x what my “25” watt harbor freight (THUNDERBOLT) panel does, but again because of the cell type amorphous the harbor works better at non perpendicular angles and diffuse light (aka fog early morning) etc. etc.
Simply put if you need 12V 10A battery charger/maintainer and you have clear access to clear sky’s and you can install at close to the optimum angle this panel and controller combo are the best.
If you only have a partially covered of off angle installation then pick up the controller only and then a CIGS or amorphous type (lower peak but wider range of performance) solar panel.
I gave 5 stars for tech support because it simply is not needed. hook up battery or panel first and just keep flipping polarity until you see the battery charging. no more multimeters and risk of magic smoke if not hooked up “correctly” the first time.
Yes if you don’t have a small collection of SAE Polarity Reverse Adapter then get some it seems SAE 2 pole products don’t really have an universal standard and the (SAE Polarity Reverse Adapter Connectors) are well worth having on hand if you want to do any system design or use other panels regulators or clamps. in fact I found I needed to use one reverser to use the included battery clamps (when used directly without the regulator) for why see below. (warning not interesting to most folks)
Most folks are concerned with efficiency but understand these self powered regulators consumes power. If you have excess capacity panels, small actual battery requirements or long term unmonitored situations then a regulator is highly recommended. Most folks have often the bare minimum panel aka real generation capacity (which we all know then suffers from environmental factors). As “most” new cars have some parasitic drain each night and as the title states these small panels are really just maintainers. unless you have a small car battery (or a motorcycle) and/or it is brand new then chance of over charging in a single day is minimal. I was doing experiments to see if a small panel 5-10 watt size (.2-.4 Ah) could even hold a 14.4 v charge on a brand new just topped off battery, the answer is no. With this real 20W (.9-1.2 Ah) kit I was able to push the holding voltage up to 14.4 so given enough time it does require a regulator
As far as charging it seems we need to get in the area of (actual measured) 40W-60W (3-4 Ah actual amps) systems Minimum to actually charge a very very new class 49 truck battery measuring 12.5v in the morning (different from unit from above test) both size 49 to 14.4 by the end of one day. This makes sense when you consider that a class 49 battery has about 100 Amp hours stored when full. From there to find how long it will take to charge it is simple math, take the of number of amp hours needed to charge to full divided by actual amp hours your system produces, this will tell you how long it will take. Remember the sun only shines so long every day and no battery is a perfect storage device so in low power systems a regulator may not even be needed just for maintenance. Also remimber Chinese watts are not real measured watts (except for this one) If your building an off grid power system then you need to plan to “charge” and not just maintain a charged battery.
So the rule of thumb holds that true .8 – 1.5 Ah chargers are really maintainers and 4+ Ah chargers can actual make up for some usage and loss.
So yes this is a great regulator because of a bunch of failsafe design features that prevent magic smoke from appearing plus when operating it provides current voltage readout plus an amperage rate which most regulators do not.
Rated 5 out of 5
Suzy-Q –
The panel, charge controller, and cables arrived in one box. I unpacked and read the easy to follow instruction. I mounted the panel on the roof of my sunroom. The charge controller, I mounted next to my electrical panel on my travel trailer wall. I connected the wires to my Duralast battery with marine battery terminals. Immediately the charge controller indicated the type of battery. Next I attached the panel leads with an inline fuse to the charge controller. Again, the charge controller showed the panel connection, that the input from the panel was charging the battery. With a few hours, the battery was fully charged and the charge controller showed the incoming amps, volts, charge level, etc. It was all automatic. Last I attached a inverter, to the battery and the inverter is powering a large fan and LED lights in the travel trailer. I’m very happy with the simple installation and output performance of the panel and charge controller.
Rated 4 out of 5
Ronald Mendleski –
Be aware, the solar panel does not come with mounting hardware. I bought the 50 Watt panel. I have ordered the specific tilting mounting bracket recommended by the manufacturer:
Amazon Customer –
Seems to work well will get more if I have a further need
hitpure –
My pickup truck has a short somewhere that I can’t find that drain’s the battery down. since I’ve been using this I always have battery with enough juice to start it.
Amazon Customer –
The item does not work. Control panel doesnt work. Zero power.
Luis Guzman –
So far I like it ! Will see if it holds up
Ronin –
When I first installed this solar panel to my shed and connected the MPPT charge controller to my battery everything was working great. I was getting 80-90 watts charging in good sunlight conditions. But a few days ago I noticed the lights on the charge controller were flashing in sequence 25%-50%-75%-100% over and over. It was perfect conditions for solar charging but still nothing was going to my battery which had dropped to less than 12v SOC. I disconnected the charge controller and connected the panel lead straight into my Bluetti power station. The panel was producing 88+ watts going into the Bluetti. So, the panel works great, but the charge controller is junk.
UPDATE: The seller reached out to me and made things right. After a couple of emails to determine the issue, the seller sent a new charge controller quickly. My system is rocking and rolling again.
SUPER customer service.
Matt –
awesome
Ronald Mendleski –
Worked perfectly for my RV….. charged my 300 amp hour lithium battery bank perfectly after trying to other solar panels that didn’t work as advertised!!!
Ronin –
This is a real 20W charging panel, and these MPPT charge controllers are finally smart and only turn on if polarity correct, how many controller simply release the magic smoke if reversed.
The only down side of the panel is it need full sun NO SHADOWS, but if a cloud passes over head yes you will loose power but once the sky is clear the system just reboots and starts charging again.
excellent power output, it is producing 3x what my “25” watt harbor freight (THUNDERBOLT) panel does, but again because of the cell type amorphous the harbor works better at non perpendicular angles and diffuse light (aka fog early morning) etc. etc.
Simply put if you need 12V 10A battery charger/maintainer and you have clear access to clear sky’s and you can install at close to the optimum angle this panel and controller combo are the best.
If you only have a partially covered of off angle installation then pick up the controller only and then a CIGS or amorphous type (lower peak but wider range of performance) solar panel.
I gave 5 stars for tech support because it simply is not needed. hook up battery or panel first and just keep flipping polarity until you see the battery charging. no more multimeters and risk of magic smoke if not hooked up “correctly” the first time.
Yes if you don’t have a small collection of SAE Polarity Reverse Adapter then get some it seems SAE 2 pole products don’t really have an universal standard and the (SAE Polarity Reverse Adapter Connectors) are well worth having on hand if you want to do any system design or use other panels regulators or clamps. in fact I found I needed to use one reverser to use the included battery clamps (when used directly without the regulator) for why see below. (warning not interesting to most folks)
Most folks are concerned with efficiency but understand these self powered regulators consumes power. If you have excess capacity panels, small actual battery requirements or long term unmonitored situations then a regulator is highly recommended. Most folks have often the bare minimum panel aka real generation capacity (which we all know then suffers from environmental factors). As “most” new cars have some parasitic drain each night and as the title states these small panels are really just maintainers. unless you have a small car battery (or a motorcycle) and/or it is brand new then chance of over charging in a single day is minimal. I was doing experiments to see if a small panel 5-10 watt size (.2-.4 Ah) could even hold a 14.4 v charge on a brand new just topped off battery, the answer is no. With this real 20W (.9-1.2 Ah) kit I was able to push the holding voltage up to 14.4 so given enough time it does require a regulator
As far as charging it seems we need to get in the area of (actual measured) 40W-60W (3-4 Ah actual amps) systems Minimum to actually charge a very very new class 49 truck battery measuring 12.5v in the morning (different from unit from above test) both size 49 to 14.4 by the end of one day. This makes sense when you consider that a class 49 battery has about 100 Amp hours stored when full. From there to find how long it will take to charge it is simple math, take the of number of amp hours needed to charge to full divided by actual amp hours your system produces, this will tell you how long it will take.
Remember the sun only shines so long every day and no battery is a perfect storage device so in low power systems a regulator may not even be needed just for maintenance. Also remimber Chinese watts are not real measured watts (except for this one) If your building an off grid power system then you need to plan to “charge” and not just maintain a charged battery.
So the rule of thumb holds that true .8 – 1.5 Ah chargers are really maintainers and 4+ Ah chargers can actual make up for some usage and loss.
So yes this is a great regulator because of a bunch of failsafe design features that prevent magic smoke from appearing plus when operating it provides current voltage readout plus an amperage rate which most regulators do not.
Suzy-Q –
The panel, charge controller, and cables arrived in one box. I unpacked and read the easy to follow instruction. I mounted the panel on the roof of my sunroom. The charge controller, I mounted next to my electrical panel on my travel trailer wall. I connected the wires to my Duralast battery with marine battery terminals. Immediately the charge controller indicated the type of battery. Next I attached the panel leads with an inline fuse to the charge controller. Again, the charge controller showed the panel connection, that the input from the panel was charging the battery. With a few hours, the battery was fully charged and the charge controller showed the incoming amps, volts, charge level, etc. It was all automatic. Last I attached a inverter, to the battery and the inverter is powering a large fan and LED lights in the travel trailer. I’m very happy with the simple installation and output performance of the panel and charge controller.
Ronald Mendleski –
Be aware, the solar panel does not come with mounting hardware. I bought the 50 Watt panel. I have ordered the specific tilting mounting bracket recommended by the manufacturer:
https://www.amazon.com/gp/product/B09SWPPNL9/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
I will add further input on the panel after I have had a chance to mount it and try it out.