Best way to charge AC200MAX via DC from EP500

Product Discussion BLUETTI AC Series
1

Hi there,
Looking for a better way to trickle charge (via DC) from my EP500 to an AC200MAX overnight - instead of from the EP500 cigarette port (approx. 100w only).
Has anyone tried using 100w USB-C with 12v-19/20v adapter to charge the AC200MAX ?
Thanks,
Jeff.

2

Hi @jphoward

i would try a different approach. AC200Max is a fairly big powerstation which can take a while to only charge with 100W. When charging a powerstation with another powerstation, the goal should be to done the charge as fast as possible to loose as less as possible energy.

Here is a little example:

Self consumption EP500 with DC: ~15 Watt
Self consumption EP500 with AC: ~40Watt

Time to charge:
DC (100W): 10 Hours for 50% charge
AC (500W): 2 Hours for 50% charge

consumed Energy from EP500:
DC: 1000Wh + 150Wh = 1150Wh
AC: 1000Wh + 80Wh = 1080Wh

The only thing im not able to calculate is how effective the AC Adapter for the AC200Max is. But it should be around the same or even less energy consumed when using AC instead of DC.

Hope this little contribution helped you

greetings
Erik

3

Thanks Erik for your prompt reply.

Yep, what you say certainly makes sense by considering the self consumption of the EP500 whilst DC is turned on for over 10 hours. Will go down the AC route.

Regards and all the best for the new year,
Jeff.

1 Like
4

You can also e.g. connect AC-DC supply 24V/10A, on solar input… Used it last summer to transfer solar overhead to AC200Max…