does this not have a battery temperature sender? to avoid battery damage? is this actually mppt not pwm?

This is a PWM, *NOT* a MPPT, and expensive for a generic PWM. The irony is that Mr Ostrosky fell upon the fact that for cheap panels (17v) in parallel, a pwm is just as good as a mppt. The standard is his 17v at 70ish degrees runs at 2v less when temperature adjustment is made since the solar panel gets really hot. Mppt transforming 15v down to battery voltage vs a pwm dumping at battery voltage is essentially indistinguishable. The mppt will only boost amperage a tiny amount over the pwm. There are some good YouTube videos on this using quality lab setups.

is this actually a 60a, mppt negative ground controller?

I been struggling with this handling 60 amp output too. I use 8 gage wire. I beleive china means it can take a solar charging panel out put of up to 60A from what I have read. They are not refering to what all of are which is hiw many amps on the load side. The wiring inside unit is very thin. Like 22 gage. I am sure my trolling motor at 40 amps would cause this to melt away. Anyone know for Sure????

controller memory- Will charge controller retain my settings when I 'kill' the power while the unit is not in use?

Yes, but it doesn't matter. It's a cheap PWM fraudulently listed as MPPT.

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30A MPPT Solar Charge Controller with LCD Display Dual USB Multiple Load Control Modes,New Mppt Technical Maximum Charging Current (30A)

Product ID: 451474572

Details

Brand
SUNYIMA
Colour
Blue
Item weight
0.34 Kilograms
Material
Plastic
Voltage
24 Volts

⚡30A max charging current

📊Multi-function LCD real-time data

🔋99% MPPT tracking efficiency

AED 167

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Description

🔆 Charge smarter, live greener — never miss a watt!

SMART DUAL USB PORTS - Charge multiple devices simultaneously while optimizing battery health.
INTUITIVE LCD DISPLAY - Stay informed with real-time voltage, current, and temperature monitoring at a glance.
ROBUST SAFETY PROTECTIONS - Built-in safeguards against overvoltage, short circuit, overload, and overcharge.
DYNAMIC LOAD CONTROL MODES - Customize power output to match your unique energy needs effortlessly.
PRECISION POWER MANAGEMENT - Harness up to 30A with cutting-edge MPPT tech for max solar efficiency.

The SUNYIMA 30A MPPT Solar Charge Controller features advanced MPPT technology with up to 99% tracking efficiency, supporting 12V/24V systems and dual USB outputs. Its multi-function LCD provides real-time monitoring of voltage, current, and temperature, while comprehensive safety protections ensure reliable, efficient solar charging for professional and off-grid applications.

Specifications

ASIN	B08L8T73R6
Best Sellers Rank	73,369 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 72 in Solar & Wind Energy MPPT Controllers
Brand	SUNYIMA
Colour	Blue
Customer Reviews	3.9 3.9 out of 5 stars (168)
Display Type	LCD
Item Weight	0.34 Kilograms
Manufacturer	SUNYIMA
Manufacturer Part Number	SUNYIMA
Material	Plastic
Model Number	MPPT 30A
Number of Items	1
Number of Packs	1
Unit Count	1.0 count
Voltage	24 Volts

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AED 167

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In stock

Sold byAmazon UAEDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

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