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Reddit mentions of HQST 20A Positive Ground MPPT 12V/24V Battery Solar Charge Controller Multiple Load Control Modes with LCD Display
Sentiment score: 1
Reddit mentions: 1
We found 1 Reddit mentions of HQST 20A Positive Ground MPPT 12V/24V Battery Solar Charge Controller Multiple Load Control Modes with LCD Display. Here are the top ones.
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Advanced Maximum Power Point Tracking (MPPT) technology, with efficiency no less than 99.5%.High quality components, perfecting system performance, with maximum conversion efficiency of 98%.Reliable automatic limit function of maximum PV input power, ensuring no overload.LCD panel display design, dynamically displaying tool's operating data and working condition.Multiple load control modes: manual mode, light ON/OFF, light On+Timer and test mode.
Specs:
| Height | 1.7 Inches |
| Length | 6.8 Inches |
| Weight | 2.4 Pounds |
| Width | 5.5 Inches |
I want the cheapest, lightest, smallest, best way to get 3 amps at 12 volts 24 hours a day for 7 days straight at 47 degrees latitude in the summer in the US. How would I do it?
My thinking is 100watt panel at $150 I kind of like the flexible for my application, and lighter is better here:
https://www.amazon.com/DOKIO-Monocrystalline-Flexible-Lightweight-Irregular/dp/B074G1CN6N/ref=sr_1_10?s=lawn-garden&ie=UTF8&qid=1525191310&sr=1-10&keywords=100+watt+solar+panel
This could work, but the metal and glass and weight will be harder to mount: https://www.amazon.com/Newpowa-Polycrystalline-Efficiency-Module-Marine/dp/B00L6LZRXM/ref=sr_1_7?s=lawn-garden&ie=UTF8&qid=1525191310&sr=1-7&keywords=100+watt+solar+panel
A second panel, esp. flexible is not out of the question.
A mppt controller at $100 I'd like the controller to have the possiblity of a second panel.
Can I get away with one of these: https://www.amazon.com/dp/B071ZVD7R5/ref=sspa_dk_detail_1?psc=1&pd_rd_i=B071ZVD7R5&pd_rd_wg=TpZ8s&pd_rd_r=3NBQTEN5HQV42CS632RT&pd_rd_w=nuxLH
Or is something like this better: www.amazon.com/HQST-MPPT-Solar-Charge-Controller/dp/B01B28DBX6/ref=sr_1_11?s
How close can you run the controller to the limit, is a 20amp controller good for 200watts of panels, or is it better to not be so close and go to 30amp?
A 4x10 amp hour 12v in parallel, LiFeP04 bank at $500 (battery might be a bit small, but 3 amp constant might be a bit exaggerated and a dark period might be ok)
https://bmsbattery.com/ebike-battery/652-12v-10ah-38120s-lifepo4-battery-4-cells-ebike-battery-pack-battery.html 17lbs
SLA could work probably x2 www.amazon.com/HQST-MPPT-Solar-Charge-Controller/dp/B01B28DBX6/ref=sr_1_11?s Can you run the SLA as far down as a LiFEPO4? 3x the weight, but 1/3 the cost. How does the life compare?
Am I thinking wrong, or missing something significant other than wires and connectors?
Are their controller considerations if looking at LiFEPO4 vs. SLA?