Top critical review
Product works fine but output unregulated with severe usability flaws
Reviewed in India on 18 June 2019
Product has few flaws:
1. Unregulated output varies upto 15.6v, may damage unprotected equipments. Please use a boost-buck regulator on the output side to protect sensitive equipments
2. SP LED just indicates if voltage available on SP, doesn't indicate if voltage high enough to charge battery or usable at all
3. Battery charge indicator does not indicate when battery fully charged and stopped charging, it just glows till sunshine.
4. Low battery cutoff sense is really bad when tested with a comparably small 4Ah battery. All Lead Acid batteries shoot up the voltage after disconnected from load, but not handled in this controller, so, your load will be turning on/off various cycles before it's finally off after the battery has settled to a low voltage.
These flaws were unexpected from a battery manufacturer itself.
Apart from this, I use this with a 60 Ah battery, with 100w + 40w panels. Had to install a capacity indicator separately in lack of any usable indication from LEDs, and with a maximum of DC load and occasional inverter use for AC, the battery never fell below 80% capacity till sunrise, so it's atleast charging well.