3 ms·Why not use a ups for the battery?by mrfusion 9y agoWhy not use a ups for the battery?detaro 9y agoCan't efficiently charge from solar, so you need an external charger anyways. Not really cheaper than an inverter. Cheaper ones are not intended to run continuously and may overheat.jandrese 9y agoAlso, most will beep annoyingly once the sun goes down.