lithium 24v batterylithium ion battery price 12vcustomized batera solar 12v 150ahlithium iron phosphate lfp batteries48 volt 100amp server rack lifepo4 batterylifepo4 cell voltage rangelivguard invertergrowatt 20000 48V Batterylifepo4 аккумулятор�48lifepo4 shelf lifewatchpower mppt solar invertercheap lithium batteries