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Heavy Duty Portable Solar Panels 200w with Lithium Regulator
Heavy Duty Portable Solar Panels 200w with Lithium Regulator
200w heavy duty portable solar panels with inbuilt legs
Smart Solar Regulator / Controller 15A Waterproof
200w Heavy Duty Portable Solar Panels with Crocskin® Cell Armour
200w heavy duty solar panels SEMA Global Media Award winner
200w Heavy Duty Solar Panels
200w Heavy Duty Solar Panels
200w Heavy Duty Solar Panels

200w Heavy Duty Portable Solar Panels with Crocskin® Cell Armour

SKU: HKPSOLM200

END OF YEAR PRICE SMASH

(36 customer reviews)

$699.00 $579.00

Available on backorder - expected arrival 20/01/2021
NOTE ON BACKORDERED PRODUCTS
If you place an order which includes both in-stock products and backordered products, we will dispatch all items together once the backordered items arrive into stock. If you would like your in-stock products sent immediately, please order them separately.

When you’re travelling off the beaten track and need to be able to rely on your solar panels, this 200w heavy duty solar mat is your absolute best choice. It is made with certified A-grade monocrystalline solar cells with solid copper cell backing, extra-thick 1680D canvas and our exclusive Crocskin® cell armour. Now compatible with all types of lithium batteries including LiFePO4, Li4Ti5O12 and Li-ion, as well as AGM, Gel, Calcium and Wet cell batteries.

Hard Korr Lighting offers free shipping Australia wideKorr offers a 5 year warranty on this productKorr Lighting offers 30 days free returns

Available on backorder

You may also need:

100AH Lithium (LiFePO4) Deep Cycle Battery

In stock

10m Anderson Plug Extension Cable

In stock

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The most durable portable solar mat on the market. Guaranteed.

When you’re out camping, particularly when you’re travelling through remote country, you must be able to rely on your solar panel. If your panel fails it can mean disaster for your trip – in some cases even having to cut it short or travel many kilometres to find a replacement.

We know how important reliable solar power is, and that’s why we’ve spared no expense in developing and producing our new Hard Korr® heavy duty portable solar panels. These panels have been designed to not only survive in hard conditions, but thrive in them. We’ve specified the highest quality materials, prototyped and tested obsessively, and pay constant attention to our manufacturing process to ensure our meticulous standards are maintained.

As Dan Wood from Pat Callinan’s 4×4 Adventures said… “The unit represents good value. That’s what I want. I don’t mind the extra spend if it’s going to make the business of remote travel that little bit easier. It is easy to deploy, pack and does its job well – boxes ticked!”

We use:

  • Rugged 1680D canvas (double the strength of most others)
  • Certified A-grade monocrystalline solar cells with solid copper backing and 20 points of contact
  • Our exclusive Crocskin® armour cell armour coating for ultimate UV and impact protection

That’s why we’re the only portable solar company in Australia that’s confident enough to offer a 3 year warranty on our solar mats. It’s also why we were awarded two Global Media Awards for our portable solar products at the 2018 SEMA Show in Las Vegas, USA.

This folding solar mat produces 200w of power and 11.1A of current This folding solar mat has inbuilt legs This folding solar mat weighs only 9kg

Key features

  • Certified A-grade monocrystalline cells with solid copper backing and 20 points of contact for ultimate strength and efficiency
  • Extra-thick 1680D canvas for enhanced durability
  • Reinforced eyelets to allow mat to be anchored in windy weather
  • Inbuilt legs set at ideal angle for maximum solar energy absorption
  • Includes detachable 5-stage digital PWM controller, Anderson plug and all necessary cables
  • Comprehensive 3-year Australian warranty
  • Hard Korr solar cells have a solid copper backing with 20 points of contact
  • Hard Korr solar mats have inbuilt legs
  • Hard Korr solar mats include exclusive Crocskin cell armouring

ALL-NEW lithium-compatible regulator

Hard Korr 15A smart solar regulator

This product now comes bundled with our new smart solar regulator.

This smart regulator will optimally charge a range of battery types, including AGM, Gel, Calcium, Wet and all lithium variants (LiFePO4, Li-ion, Li4Ti5O12). It contains a host of smart electronics including reverse polarity protection, short circuit protection, reverse current protection, overcharge protection and more.

Its large, backlit LCD screen provides useful information relating to power input and battery charge level, and inbuilt LEDs provide a quick-reference indicator of battery charge status.

If the regulator is not required – for example if you are using the solar panels with a DC-DC charger or a built-in regulator – it can simply be disconnected. All cables are terminated with Anderson plugs for ease of use.

The Crocskin® Difference

Sitting under the baking hot sun for many hours at a time means solar mats are exposed to large quantities of ultraviolet light and generate a significant amount of heat every time they are used. The materials used in the construction of the mat must be resistant to both, as well as being flexible and impact resistant.

Our exclusive Crocskin® cell armour coating has been specifically designed with this in mind. It provides an excellent protective barrier to the solar cells, increasing their durability and lifespan.

In fact, our Crocskin® coating showed no signs of deterioration after an accelerated weathering test that simulated 30 years’ sun exposure.

The Hard Korr® Guarantee

All Hard Korr® products are manufactured using the highest quality materials. We are confident that they are the most durable in the market and will give you many years of reliable service. We stand behind this product with a comprehensive 3-year Australian warranty, plus a 30-day money back guarantee.

Frequently Asked Questions

What separates a Hard Korr® folding solar mat from cheaper models?

Mostly it comes down to quality of materials and manufacturing. We specify certified A-grade monocrystalline solar cells for optimum efficiency and lifespan, solid copper cell backing with 20 points of contact, extra-tough 1680D canvas and exclusive Crocskin® armour coating for durability. Our panels are manufactured to a very high standard including strong stitching and careful wiring. That’s why we are able to offer a long 3-year warranty!

Do I have to use the included controller?

You must always use a controller between the solar panel and your battery, but if you have your own solar controller (e.g. built into a camper trailer or RV) you can use that instead. We include an Anderson plug connector in the box.

How do I position my solar mat?

You can place your solar mat anywhere it receives direct sunlight. This might be on your windscreen or bonnet, on top of your awning, on your roof rack, or on the ground using the inbuilt legs. You will experience a moderate increase in output if you are able to angle the panels 30-45° to the sun.

If one cell is shaded or blocked, does the whole panel stop producing electricity?

No. Our mat is designed with bypass diodes to ensure that if one cell is not producing power the rest of the cells are unaffected. This is another difference between a Hard Korr panel and cheaper models.

Can I leave my mat out in the weather?

Yes, Hard Korr solar mats are designed to withstand rain and even hail. However, your panel will not generally produce much electricity during inclement weather so we recommend you bring it inside at these times. If your solar mat gets wet, please ensure it is thoroughly dried prior to storage.

Which panel do I need for my setup?

Start by finding out the total current draw of all the equipment you wish to use. Multiply this figure by the number of hours the equipment is generally used to get the total amp hours consumed. Solar panels can generally provide their stated output for 8 hours per day, so multiply the stated output by 8 hours to find out how many amp hours your solar mat can provide. Here’s a worked example:

You use a Hard Korr 5-bar camp kit for 4 hours per day (3A x 4h = 12Ah)
You use a fridge for 24 hours per day that draws 1.5A per hour (1.5A x 24h = 36Ah)
You use a TV for 3 hours per day that draws 5A per hour (5A x 3h = 15Ah)
Total consumption = 63Ah
Add 25% buffer = 63 x 1.25 = 78.75Ah
Solar panel output required = 78.75Ah / 8 = 9.84A
Hard Korr’s 200w portable solar panel produces up to 11.1A per hour on a clear day and will be sufficient in these circumstances.

Specifications

Cell type A-grade monocrystalline silicon
Cell efficiency 20.5%
Cell backing Solid copper
Cell coating Crocskin® cell armour
Wattage 200w
Working max. voltage 18V
Working max. current 11.11A
Open Circuit 21.24V
Short Circuit 12.22A
Size (folded) 710mm x 530mm x 40mm
Size (unfolded) 2130mm x 700mm
Operating temperature -30°C to 70°C
Weight 9.0kg
Certifications CE, RoHS, C-Tick

Pack Contents

1x 200w heavy duty portable solar panel
1x 15A 5-stage digital controller
1x 5m lead with Anderson-style plugs
1x 1.5m Anderson-style plug to battery clamp cable
4x Tie down pegs
1x Protective carry bag

Frequently Asked Questions

What separates a Hard Korr folding solar mat from a cheap eBay model?

Mostly it comes down to quality of materials and manufacturing. We specify certified A-grade monocrystalline solar cells for optimum efficiency and lifespan, solid copper cell backing with 20 points of contact, extra-tough 1680D canvas and exclusive Crocskin® armour coating for durability. Our panels are manufactured to a very high standard including strong stitching and careful wiring. That’s why we are able to offer a long 3-year warranty!

Do I have to use the included controller?

You must always use a controller between the solar panel and your battery, but if you have your own solar controller (e.g. built into a camper trailer or RV) you can use that instead. We include an Anderson plug connector in the box.

How do I position my solar mat?

You can place your solar mat anywhere it receives direct sunlight. This might be on your windscreen or bonnet, on top of your awning, on your roof rack, or on the ground using the inbuilt legs. You will experience a moderate increase in output if you are able to angle the panels 30-45° to the sun.

If one cell is shaded or blocked, does the whole panel stop producing electricity?

No. Our mat is designed with bypass diodes to ensure that if one cell is not producing power the rest of the cells are unaffected. This is another difference between a Hard Korr panel and cheap eBay type models.

Can I leave my mat out in the weather?

Yes, Hard Korr solar mats are designed to withstand rain and even hail. However, your panel will not generally produce much electricity during inclement weather so we recommend you bring it inside at these times. If your solar mat gets wet, please ensure it is thoroughly dried prior to storage.

Which panel do I need for my setup?

Start by finding out the total current draw of all the equipment you wish to use. Multiply this figure by the number of hours the equipment is generally used to get the total amp hours consumed. Solar panels can generally provide their stated output for 8 hours per day, so multiply the stated output by 8 hours to find out how many amp hours your solar mat can provide. Here’s a worked example:

You use a Korr 5-bar camp kit for 4 hours per day (3A x 4h = 12Ah)
You use a fridge 24 hours per day that draws 2A (2A x 24h = 48Ah)
Total consumption = 60Ah
Solar panel output required = 60Ah / 8 = 7.5A
Korr’s 160w mat produces 8.1A and will be sufficient in most circumstances. A 200w panel would provide additional buffer.

36 reviews for 200w Heavy Duty Portable Solar Panels with Crocskin® Cell Armour

  1. Anthony Napoli

    I am new to the solar blanket world and after doing my research I believe I chose the best out there for a great price!

    So far I am very pleased with the quality and durability of the solar blanket. I got to use it on a 2 night camp with a heavy cloud cover and I was sceptical on how the solar mat would perform but it pulled through keeping my lithium battery charged and running my fridge on -01 in an average 28 degree day. I didn’t get too caught up with the numbers and output AH etc but all I know is it bloody worked!! Can’t be happier with this mat.

  2. Frederick (verified owner)

    On the road since June 2020 in a Sprinter Van and struggling to charge the house battery with a 100W roof panel when I started researching Solar Blankets. Checked out every unit in all the camping stores and feedback online before deciding to go with a Hard Korr 200W panel. Purchased in July and had it delivered to Aus Post in Townsville with the order being processed efficiently and promptly. Also very lucky to get it on special for $ 579 and worth every dollar. Best decision we made and have no issues charging our house battery that runs a 110 litre fridge amongst everything else. Perfect supplement to roof solar even on cloudy days. Excellent quality, solid build, easy setup, and reasonably light at 7.5 kg. Legs are a great asset. On windy days we use shock cords to attach panels to the bulbar together with security wire and padlocks via the eyelets so we can safely leave on site when out hiking etc. Extra 2m extension cord made up at Jaycar supplements the 5m cord that comes with the unit but is used rarely. Have many people at campsites check it out when used and we are happy to show it off! Highly recommended and a reliable asset on the road camping as we don’t go to caravan parks.

  3. Russell

    Highly recommended. Camped for an entire week and this panel kept my nearly 5 year old auxiliary battery (standard Century NZ70 ) fully charged. Previously would only last one night before needing to run the car for a charge. In built stands are great. Regulator and display is great an easy to use. Love that the regulator and cabling is all part of the package as my daughter also used it on her car when my battery was maxed out on charge. Overall build quality is great, it copped rain, a storm and ash (much to my dismay) on this week and didn’t miss a beat. This is my first solar panel and now don’t know how I survived without it. The only thing I will be adding to the kit is making up a 10m extension. Now I can keep the tunes cranking and the beers icy cold 🙂
    If I was gong to suggest any improvement it would be to have stands that allow the panel to be angled in opposite directions. This would eliminate having to spin the whole panel 180 degrees to have the panel point at the sun as it goes down. But this is being very fussy, they are a great product as it is.

  4. John walsh (verified owner)

    I purchased the 200 watt unit some time back on special for about about $750 from memory, so extra good value at the current pricing.
    I have been permanently on the road since before the purchase and use for both the van and second vehicle batteries. The performance is excellent and I have nothing negative at all to say about the product or the company, just awesome all round. A big thanks to the whole team. John W.

  5. kerry smith (verified owner)

    Purchased a 200w solar panel for Cape York trip. I ran two 40l fridges, one as a fridge and one as a freezer.
    Was able to maintain charge in second battery when time allowed to stay in one place or return to full charge.
    Was very impressed with operation and the sturdiness of the product. Would definitely recommend.

  6. Dan Smith (verified owner)

    I did alot a research on solar panels tossing up cheaper alternatives but ended up landing on the 200w hardkorr folding panel. I’m am stoked that I did the build quality is excellent from the panels themselves right down to the hardware that comes with it. The regulator is great with the digital display showing how many amps you are producing. Can’t recommend enough.

  7. Jeff Corbett (verified owner)

    Clearly the 200w folding panel is a quality product. When I set it up an hour or so after it arrived by courier the regulator showed its output to be 10.9 amps, a very useful charge into the battery. In the four or five middle hours of the day that’s not uncommon, and a few times I’ve seen a reading over the stated max of 11 amps. I’m pleased I paid the extra for good gear.

  8. Colin Forno (verified owner)

    I purchased my Hard Korr 200W solar panel to supplement two 160W roof mounted panels on my caravan which is equipped with a power hungry 190 litre compressor fridge and other goodies. Even with two 100W lithium batteries, it is often challenging to keep up with the van’s power requirements on extended stays free camping in the bush, and even moreso when overcast weather sweeps in. On my first trial yesterday, I was delighted to see my new panel delivering an additional 11 A/h to the system at 9:00 am taking my aggregate input to around 26A/h and cruising to 100% batteries charge. The panel performed to the maximum output specified and everything about this panel is as represented. I am absolutely delighted with my purchase and with the customer focussed attention I have experienced with Hard Korr. The quality is there, and whilst there are cheaper options on the market, you get what you pay for.

  9. Bryan Hawke (verified owner)

    Could not be happier running the 200watt folding panels to the two starting batteries then via a battery isolator to the two in the rear box.
    They have been in rain and hail with no issues top product.

  10. Colin Pearse (verified owner)

    The name says it all, my 200 watt portable heavy duty solar panel performed very well, the output is exceptional, even when part of the panel was shaded slightly. I’m very happy, and would highly recommend.

  11. Steven Upton (verified owner)

    Absolutely love this solar panel, very good quality, a pleasure to deal with.
    What more could I want.

  12. Brian Hall (verified owner)

    Just bought 2 x 200 w folding pannels. The pannels are great, giving over 11 amps in full sun.
    Disappointed with the built in legs however. Very short, so the panels are always almost laying flat. Can’t get the best from early morning or late afternoon sun..
    They need to be full length and hinged from the top.

  13. Craig (verified owner)

    Compare apples with apples…
    So I have been running the cheap flexible solar panels for a few years now and like most of us have been unhappy with the results.
    For the past 2 weeks, I have done a real word comparison with my new Korr 200W, kings 250W panels, and an eBay set.
    I have coped flak from my mates on this trip about how much I paid over their kings and eBay set so I decided to put my money where it counts (6 pack) and decided to have a head to head. so the results? kings 250W panels managed a peak of 120W and eBay 111W. Korrr under the same conditions was 178W. Under real-world conditions, my new Korr panels were out in front by a considerable amount. So while I sat back drinking my free beer my mates were chasing the sun to charge their batteries. These panels are the best I’ve seen, are far more durable than the competition, and backed by a solid company. Do yourself a favor and get yourself a set.

  14. Steve P

    Hi All
    We have just upgraded from the Original 200w Blanket to the tougher Panels. The controller now has more Battery profiles to choose from and better connections including Anderson’s, with a heavy duty Flex cable. We tested both Panels while staying at Kumbak Kamping in Kenilworth and the new Panel performed way better than the original Blanket. The built in legs work a treat and the Panel is also heavier now so it does not blow over as much. Both Panels are very high quality and weather resistant ans would suit different applications, mainly when weight is an issue. Ran the panel on a Gel and also AGM on cloudy days, Still had amps running into my Camp battery box.

  15. Damian Wilson (verified owner)

    Very happy with the panel’s so far just need more time out in the scrub. They will get used soon as off for 2 weeks free camping up in the flinders.

  16. Jeff (verified owner)

    Good fast delivery. Easy to setup, with some initial issues as you really need to understand your aux battery charge state and BCDC requirements, noting that we were using the solar blanket in the unregulated mode, however once that was sorted the panels worked like a dream. Tested them out at Quobba Station (North WA) over many days and they reliably charged our battery while running a Dometic 75L fridge/freezer. Compared to friends solar blanket/s, the 200W solar blanket is more sturdy/robust (a little heavier also) and actually produces what is expected.

    Very pleased with the product.

  17. Kyla van der Klauw (verified owner)

    Fast delivery, great price for an excellent quality solar panel.
    Finally got to test it in the wild last week and it was relatively light and portable and continued charging our batteries even in cloud. My husband loves The regulator. So glad that we upgraded from our old panel.

  18. Jeff Titmarsh (verified owner)

    We recently bought a 200 watt panel and couldn’t be happier with it. We went camping at Adels Grove and it had no problems running our 60 litre Engel and keeping our deep cycle battery charged.
    Easy to set up and use and very tough. Very happy with it.

  19. Marcus (verified owner)

    Been very happy with the quality of this product. Working well and seems to produce some good wattage. Strong light and portable. Looking forward to purchasing more Hard Korr products.

  20. Charlie Norman (verified owner)

    Excellent 200W Sola panel . Works a treat
    ?

  21. Urs Gruenig

    I use this panel because of its quality, the compactness and the high performance output even in cloudy condition. It is very compact and when folded away it uses very little space behind the driver seat of our VW t6 campervan. We use this 200 Watt panel doing the lap around Australia, every day, in all conditions, rain, wind and dust. Unfortunately the panel has stopped its full performance after 5 month and I assume there is a connection failure between the folding. I reported it to HardKorr and they replaced the panel straight away. This is an excellent product with a trustful and reliable backup Australia wide. Thank you Kirk from HardKorr.

  22. Ian McPhee (verified owner)

    Recently purchased the latest 200watt solar blanket and we are are super impressed with this version. Our battery running our 60lt Engel fridge was charged very quickly even in cloudy weather.
    Korr products never let us down. We have been using them for many years now.

  23. Geoff Waye (verified owner)

    Looking at the portable panels they look to be well made and it’s great that they have built in legs. They are a bit awkward to keep the legs out but not impossible and much better to have them then not. The fittings appear to be well made and strong and the fact that I can use the regulator or not is also ideal for me. This regulator will also do lithium batteries so that’s why I bought it. The cable that came with it in my view could be longer then the 5m but other then that it does what it states it will do in amps or maybe just a wee bit more as mine was putting out 11.2amps when I connected it.

  24. Mick & Melissa Sander (verified owner)

    High quality and well designed. I run two panels (in parallel), and they both fit inside the one carry case which makes transportation and storage easier. The panels unfold easily on the roof of my car or on the ground using the inbuilt stands. They are very effective and efficient, providing a good charge to my battery in cloudy conditions and at high angles. A very good product at a reasonable price.

  25. Paul Young (verified owner)

    I purchased the 200 watt solar blanket with 15Amp controller. The controller must have 2 inline 30amp fuses in order to operate safely.
    It would have been nice if these were built into the supplied power cables as now I have to hunt around and find some fuses and then fit them.
    The Anderson plugs don’t look very weather proof. There are better more weather proof connectors supplied with other solar panels for similar prices. It’s a shame better connectors aren’t fitted to these solar panels given the glowing reviews.
    The build quality of the actual panels seems good but they are heavy due to all the copper. 9.0 kg.

    • Korr Shop

      Hi Paul. Thanks for the feedback, but I do need to pull you up on a couple of factual errors. First, you do not need additional inline fuses to operate the solar panels. We supply everything you need to operate the unit safely. Secondly, the Anderson style connectors we supply are weatherproof – you will find they are a very standard item, other solar panels are no different. The rear end does not need to be sealed as the positive/negative is well isolated and there is no chance of shorting. In any case, these issues aside we hope you are happy with the purchase and get many years of faithful service from your solar panels.

  26. Ken Langley

    Recently purchased hard Kerr hand torch. Great unit. These guys sell good gear.

  27. MARTIN CORCORAN

    the 200w unit is the best that korr light has made yet keep up the good work

  28. Graeme Ware

    A big thank you to Hard Korr Lighting for brilliant product support, we received the upgrade version 200w as a replacement for our original 200w mat that we thought was pretty awesome but this new one is much more user friendly with the built in legs, anderson plugs and packs a punch. We purchased it to mainly charge our truck batteries when not driving and off grid consisting of 4 x 120ah (2x starter + 2x house running a 40lt Engel) , we have used it every day for the last 2 weeks consistently pushing 10amp in full direct sun, batteries full by 11am. With the caravan plugged in to truck and charging via a Ctek 250S duel (van has 3x 120ah agm and 300w solar running 175lt Waeco fridge) batteries full by 3pm. A very impressive product.

  29. Will Mulquiney (verified owner)

    Absolutely stoked with the quality and performance of the solar panel. Great output even in cloudy conditions and easy to get maximum output without constant stuffing around to align with the sun.
    Fast shipping and great communication from the get go.
    Many thanks for the great service and product.

  30. Rod Mayne

    I have 200 watt Korr blanket runs both 60lt and 32lt engels no worries. looking at purchasing another for boat fridge. I also have 160watt foldable waste of time could not keep up charge and had to keep moving into sun and it kept blowing over in wind. Hard Korr great product.

  31. Harry Dick

    Took it camping with us for 3 days& it worked very good, did all that is advertised. have a camper with 2x 100ah batt. & run an 80 litre evakool fridge/freezer + lights,water pump, & charge phones. even if not in full sun it was still putting a charge into the batts.,(i was impressed with that). used to have a 160w folding solar panel & it just didn’t do the job. So far so good.

  32. RicCo

    Have been using this mat with a Victron MPPT 75/15 controller for a few months now and are very impressed.
    The ease of use is fantastic and being able to set it all up ( cables etc) before loading the panels (exposing to the sun) is a bonus.
    Set up, open the mat out and off you go.
    Build quality is good and could only suggest better waterproofing on back of Anderson plug adaptor.
    I made a frame to angle it to the sun and after initial test have NEVER used it as it is so efficient just laying it on the ground.
    Well done Korr Lighting

  33. John Cawood

    Very happy with my two 200W solar mats received today. Both worked out the box and they are so light. Only tested them on a battery that was almost fully charged but tomorrow I will run a 47 liter fridge freezer off the battery and put the solar mat on to see how it performs under load. The controller is good quality and gives you all the info you would need. Seems smart and light.

  34. David Olds

    I just wanted to thank you for your great service. I paid for three 200W solar mats yesterday afternoon, and the mats arrived this morning. Fantastic. I opened up the first box to check the product and found it to be exactly as advertised with very clear instructions. I then set up the mat and connected it and the controller directly to an 85Ah AGM battery in my vehicle. I have a 40lt Engel fridge running on the battery at the same time. When the solar mat is in full sun I was very pleased to see that the system was putting up to 12.3A into the battery for a short time. Once the voltage came up and with the Engel stopped it was consistently charging the battery at 1.5/2A. Needless to say, I am stoked with my purchase. It’s a great product and well made, and I would recommend it to anyone.

  35. Matthew Casey

    We used solar cell last weekend camping. All went well very happy. Thank you.

  36. John Kain

    I recently purchased a 200w folding panel from you for a trip to beautiful Warroora station in the west australian north.
    We stayed for a month and used your panel to charge a secondary battery fitted to my ute with a reserve capacity of 130 and 68amp hrs.
    I had a 40l engel fridge running exclusively as a freezer from the battery.
    This setup ran the freezer without a hitch and made for a comfortable well stocked holiday.
    I was most impressed.

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Instruction Manual

The user's manual for all Hardkorr lithium-compatible solar regulators