Review on 🔆 Sun Energise 20W Waterproof Solar Battery Charger Pro with MPPT Charge Controller - 3-Stage Charging - Trickle Charger Panel with Adjustable Mount Brackets + SAE Cable Kits - 12V by Hesham Peltier

I'll start this review by saying that a truly reliable assessment of the performance of a lead-acid battery charger needs to be made by laboratory scientists or testing personnel. in an organization like Consumer Reports. Many factors come into play that determine how a charger can perform, such as actual storage current and portability range of ambient temperatures in a given geographic location average daily solar energy usage (for solar chargers). My first test was on a flooded lead-acid battery in my 2019 Toyota Tundra pickup. The Group 27F battery is rated at 710 amps cold cranking. Using an electronic multimeter, I ran 31 voltage tests between 05/03/2020 and 05/10/2020, starting in the morning with good sunshine and ending in the late afternoon. The general recommendation for a fully charged float voltage of 12V lead-acid batteries is 13.5-13.8V. Flashes red to green as expected when the battery is fully charged. 05/11/2020 in the morning the open circuit voltage was 12.39; after 15 minutes of running the engine, the voltage with the engine running was 13.60. After the engine stopped, the voltage dropped to 12.63. HOWEVER, there's an important consideration here, and that's why I don't blame the charger for underperformance: The truck only has 700+ miles on the odometer in its first year of ownership and sits idle most of the time. . All batteries slowly lose charge over time unless placed on a charger for maintenance. If the voltage is low enough for long enough, the lead-acid battery will degrade and lose its ability to hold a full charge. . The deep cycle batteries for my off-grid solar system are designed for multiple discharges over many years, which would quickly destroy a car battery. So, as far as I can tell, the Tundra's battery is moderately drained, and it's unreasonable to expect ANY 20-watt solar charger to bring it to the ideal float voltage. The more reliable and honest test I ran was a sealed AGM Mighty Max ML35-12 battery rated at 35 amp hours for my arc welding motor alternator starter. Again this battery is not used for months but the difference is that it was always connected to a 1.5 amp AC supply (Schumacher SEM-1562A-CA) which maintains a constant floating voltage of 12.95. When I switched to the solar charger on 05/11/2020 the voltage rose to 13.03 and the LED was solid green. Two hours later, the tension dropped back to 12.88 in moderate cloud. At 12:45 today with moderate cloud, the voltage was 13.66. Some higher wattage AC chargers claim to have special charging algorithms that can at least partially restore lead-acid batteries that have deteriorated and exhibit a condition known as sulfation on the plates, but it's best to to avoid this. Accompanied. The two new multi-purpose Napa batteries in my trailer, 110 CCA total, were hooked up to a 50w solar charger from the start, which keeps them at 13+ volts. One complaint about the SunEnergise charger is that the battery terminals are thin steel, and the black and red plastic shells are also flimsy and flimsy. All other components are solid and well made. The owner's manual lists the floating voltage as 13 volts; Obviously the 13.5-13.8V I mentioned earlier may not be the ideal range that can be applied universally. (PowerStream Corp.'s website has a good guide to many aspects of batteries.) I had a question about the red "Charge" LED blink rate and emailed SunEnergise regarding this and a few other issues. technical support department. The technical consultant responded immediately and answered all my questions in detail and completely. I will continue to use this charger to keep my Tundra battery in good charge as there is no convenient outlet where I usually park it.