What follows is a compilation of what I’ve learned about the currently available inverter models and charging voltages.
Most of it can be summarized as inverters are generally designed for FLA batteries, which require higher charging voltages than the UPS focused AGM/VRLA Amaron Quanta batteries that I have.
In no particular order:
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Exide
Boost Charging Voltage:
14.4V per battery
Float Charging Voltage:
13.7V per battery
Reference:
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Smarten
Boost Charging Voltage:
14.4V per battery (Tubular & SMF)
14.0V per battery (Flat)
Bulk Absorption Voltage:
14.8V per battery
Float Charging Voltage:
13.7V per battery
Reference:
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Livsol
Boost Charging Voltage:
14V to 15V adjustable, 14.4V default per battery (Tubular)
13.8V per battery (SMF)
Float Charging Voltage:
13.7V per battery (Tubular)
13.5V per battery (SMF)
Reference: Company sent manual on WhatsApp.
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Delta Power
Boost Charging Voltage:
13.8V to 14.5V adjustable, 14.4V default per battery
Float Charging Voltage:
13.7V per battery
Reference:
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https://www.amazon.in/DELTA-POWER-Automatic-CONFIGURABLE-stabilizer/dp/B0BL8DWPY7[/ICODE]
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Ashapower
Bulk Charging Voltage:
13V to 16V adjustable, 14.4V default per battery
Float Charging Voltage:
13V to 16V adjustable, 13.8V default per battery
Reference:
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https://ashapower.in/products/dsp-sine-wave-home-ups-lander-2500[/ICODE]
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Genus
Boost Charging Voltage:
14.6V per battery (Tubular)
14.4V per battery (SMF & Flat & solar models)
15.6V per battery (Desulphation/Revival)
Float Charging Voltage:
13.8V per battery (Tubular)
13.6V per battery (SMF)
13.7V per battery (Flat)
13.8V per battery (Revival)
13.5V per battery (for solar models)
Reference: Company sent manual on WhatsApp.
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Luminous Cruze
Boost Charging Voltage:
14.6V per battery (Tubular)
14.2V per battery (Flat)
Float Charging Voltage:
13.9V per battery
Reference: User manual that came with my unit.
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UTL
Boost Charging Voltage:
13.5V to 15V, 14.5V default per battery (Tubular)
13.5V to 14.2V, 13.5V default per battery (SMF)
Float Charging Voltage:
13.5V to 14.2V, 13.8V default per battery (Tubular)
13.0V to 14.2V, 13.5V default per battery (SMF)
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https://5.imimg.com/data5/SELLER/Doc/2023/3/JD/DD/SI/137902568/utl-gamma-224-rmppt-pcu.pdf[/ICODE]
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Some thoughts:
Ashapower and UTL have the largest adjustable range, making them the most suitable inverters for any kind of battery. Livsol’s default settings for SMF is perfect for Amaron Quanta.
However, neither the Ashapower nor the UTL has transfer times that’s suitable for use as a UPS. Ashapower lists their transfer/changeover time as 20ms and there are videos on youtube about UTL that mention how “IT Mode” is actually a narrow voltage range mode and transfer times remain the same. Other videos show how the transfer time is so slow that devices like routers do not hold power and that’s despite the fact that they that have a tiny amount of reserve power in their power adapter. I can’t find any user experiences about the Livsol (or photos for that matter — only renders).
This is probably because they’re all using relays in their designs. I never faced transfer time issues with my Luminous Cruze because it’s likely the only model that uses mosfets instead of relays, giving it a near zero transfer time (another thing to add to the list of things that I was not aware of when I originally purchased it).
So it looks like I’ll be keeping the inverter since it is working very well as a UPS and instead I’ll find an alternative for the battery situation. The two recently purchased Quanta batteries will be repurposed for some other setup, maybe a DIY ups for networking gear.