Reddit reviews HQST 30 Amp 12V/24V PWM Common Postive Solar Charge Controller with LCD Display and 5V 1A USB Port, Compatible with Sealed, Gel, Flooded Lead-Acid and Lithium Batteries

Hi, I was recently looking for the same thing. This is the set up I am ordering:
For the panels--http://www.amazon.com/gp/product/B00IK19VF6/ref=ox_sc_act_title_5?ie=UTF8&psc=1&smid=A05654602L3XUQ70M87BV
Battery bank--http://www.amazon.com/gp/product/B00BUH0VB0/ref=ox_sc_act_title_9?ie=UTF8&psc=1&smid=A33OOXQLQV58WQ
Charge controller--http://www.amazon.com/gp/product/B00FB3OPKM/ref=ox_sc_act_title_2?ie=UTF8&psc=1&smid=A05654602L3XUQ70M87BV
Inverter--http://www.amazon.com/gp/product/B007SLDDHQ/ref=ox_sc_act_title_8?ie=UTF8&psc=1&smid=AWZ3LXPHZK09

I'm pretty new to this too, this is just what I've come up with from doing research and assessing my (basic)needs. I would like to hear other opinions as well.

Looks like bullshit to me.

1. No discussion on the technology used on the website. No specs This is a huge red flag. What temperature does the fridge maintain? How long does it maintain that temperature on battery power?
   
2. I see no compressor. This means it is likely utilizing a Peltier to do the cooling, which runs at about 10% efficiency (compared to 30% with a compressor which is 3x more efficient) and is incapable of maintaining temperatures of proper refrigeration. It may cool your drinks down to 45-50 degrees, but it will not function for safe fresh food storage.
   
3. Those solar panels are going to put out a max of maybe 50W in the heat of the day if you're lucky, probably closer to 20W. And that involves taking your refrigerator and leaving it in the sun, where you will need far more cooling capacity to maintain proper temperatures. That's not enough juice to run a portable compressor powered refrigerator by a third. You'd probably need 6 times as much power to properly cool with a peltier.
   
4. Large gaps between the parts will make for leakage and loss in cooling capacity. Combined with thin walls, this thing is not going to be a good insulator.
   
   
   You can use a compressor powered, 12VDC portable refrigerator and freezer effectively on the go, but you're going to need some dedicated solar power production. Let's run through some numbers:
   
   31 liter capacity portable fridge/freezer for $611
   They have a 10.5 liter capacity version for $316 if you need to go really cheap. Reviews say this unit draws an average of about 3.75A, or 45W. For quick math: watts = volts x amps.
   
   

• This will consume 3.75 amps for 24 hours every day, so it consumes 90 amp hours (AH) per day.
  
• Lets say for 16 hours per day you need to make sure your fridge runs of of batteries. So 2/3 of that 90AH will come from batteries, resulting in a number of 60AH for battery power
  
• I am going to add 50% right back on that 60AH for energy loss and battery efficiency, putting the requirement back at 90AH. We're then rounding this to 100AH since thats the size batteries come in. To run the above refrigerator at 45W all day long on solar/battery power, you will want a 100AH deep cycle or AGM battery
  
• Next up, we want to know how much solar power you need to keep this going. This varies by solar panel placement and latitude, but I'm going to say you get a total of 6 hours of prime sun per day. During that 6 hours, you need to be able to charge 100AH of battery. That equates to 16.6 amps per hour. 16.6 amps x 12 volts = 199.2W. To run this system you will need 200W of solar panels on the roof of your van, producing power for you
  
  As a comparison, you can just how much different an actual refrigeration system is from the portable unit linked above. Looking at the pricing and weights further shows just how far off this system is from being able to actually safely refrigerate your food.
  
  
• 100AH battery for $179 (weighs 63lbs)
  
• 31 liter capacity portable fridge/freezer for $611 (weighs 30lbs)
  
• 30A charge controller for $30 (weights maybe 1lb)
  
• 2x 100W solar panels for $277 (weights 33lb)
  
  In total, This is $1100 in hardware and 127lbs of equipment to be able to properly maintain cold food storage. The thing you linked is a backpack sized beverage cooler only.

I picked: Model MB7420 motorola for an example.

power draw: 12v @ 1a. 12 watts.

12v supply is really REALLY nice for the next thing i'm going to suggest: solar and a battery.


https://www.amazon.com/MOTOROLA-MB7621-Approved-Spectrum-Downloads/dp/B077BL65HS/


26 bucks for a charge controller:
https://www.amazon.com/HQST-Regulator-Charge-Controller-Display/dp/B00FB3OPKM/

46$: a 20 amp hour battery will be more than enough to get your thru the night. if you're concerned about cloudly days then you can double it up.
https://www.amazon.com/Chrome-Battery-12V-20AH-T3/dp/B00BW3ULZI/

130 bucks for a 100watt solar panel
https://www.amazon.com/Renogy-Watts-Volts-Monocrystalline-Solar/dp/B009Z6CW7O/

figure 20-30 bucks in wiring and mounts and random stuff.

total cost to power it: 200-250$.

I just set my panel on a lawn chair and point it at the sun moving it a couple times during the day.

links to what I bought-

https://www.amazon.com/gp/product/B018BMGTTO/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B01D7VBJK8/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B00FB3OPKM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

I was planning on getting a 30 Amp like this one

The panel output more like 5.5 amps /hour per 100 watt panel that's what my HQSTs do. PWM Is fine for a small solar setup better gain would be to get a 3rd panel than the extra expense of mppt. Something with a lcd to display input and output in amps is nice like HQST 30 Amp PWM Smart Solar Charge Controller with LCD Display https://www.amazon.com/dp/B00FB3OPKM/ref=cm_sw_r_cp_apa_.XETybK31ADKN