Hi Max,
I am using these chargers, have been using them for years with no problem. I have 5 of them hooked up running 24 hours a day with no issues at all and they use virtually no power at all and I monitor my power daily. The solar panel I set up was only a cheap Chinese thing and it only lasted probably 18 months before it went haywire and cooked the battery.
https://www.ebay.com.au/itm/294640723981?_
