This is a nice inexpensive down converter that can be used for a power supply or a battery charger.
Check this idea out: You can charge your project battery with this module then simply turn it around and run your project using the converter as the power supply. In this way you can set it to any voltage for the project and add the amount of current limiting you need to be safe. You probably don’t need a fuse on the battery anymore.
5V-30V 5A Red Current Voltage Display Step Down Module LED Panel
This discount code may apply for 10% off. (one time)
Module Properties:Non-isolated step-down module
Output Current:Max 5A (over 3A to enhance heat dissipation)
Conversion efficiency:95% (the highest)
Output Ripple:50mV (max) 20M Bandwidth
Operating Temperature:-40℃ to +85℃
Module Name:Current and voltage table
Refresh rate:About 200ms time
Display:Dual 4bits 0.28″ digital tube
Operating Current:Less than 15mA
Storage Temperature:-10℃ to +65℃
Input impedance:50 milliohms
Rechargeable lithium-ion battery
When the lithium-ion battery voltage is relatively low, if the direct use of constant voltage charging, the voltage difference due to the larger, leading the charge current is too large, resulting in damage to the battery, so when you want to start using the constant battery current charging, when the charge to a certain extent automatically switches back when the constant voltage charging.
Module above indicated IN-(input negative), IN+(positive input), OUT-(negative output), OUT+(positive output) must be connected to the right, otherwise may cause damage to the module.
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100A ENGINE STARTER | 30A FAST CHARGER | 5A CHARGER | 3A MAINTAINER FOR ADVANCED DIAGNOSTIC TESTING, ENGINE STARTING & CHARGING • Improved clamps • Powerful enough for starting SUVs, trucks and large batteries • Battery and alternator tester ─ Provides charge level and helps diagnose electrical problems. • Digital Display, LED indicators and button controls ─ For ease and accuracy • Float mode monitoring ─ Automatically maintains optimum battery charge • Auto voltage detection ─ 6 or 12 volt • Reverse hook-up protection ─ Charger will not operate if clamps are reversed. • Wrap cleats ─ Provide convenient cord storage
50A ENGINE STARTER/ 10A BOOSTER / 6-2A CHARGER/MAINTAINER FOR ENGINE STARTING, CHARGING & RUGGED USE • Microprocessor controlled ─ automatically adjusts the amperage rate to charge & maintain. Multi-stage charging for added precision, safety and battery life. • Charges 12 volt Standard, AGM and Deep-cycle batteries • Float mode monitoring ─ Automatically maintains optimum battery charge • Reverse hook-up protection ─ Charger will not operate if clamps are reversed. LED indicator will flash. • Energy efficient ─ Meets the highest industry standards
I purchased this Schumacher XC10 Battery Charger to help keep my solar battery charged up in the event it isn’t able to be charged enough from the panel. I’ve done some testing with this charger and was not amused by the results.