Search found 7 matches

by jairbj
Jun 22 2021 7:38am
Forum: Battery Technology
Topic: Rectifier Emerson R48-3500e/3200e MOD - Voltage Adjust - 13.65v to 53.9v
Replies: 1
Views: 91

Re: Rectifier Emerson R48-3500e/3200e MOD - Voltage Adjust - 13.65v to 53.9v

Today I measured the resistance I am using with potentiometers instead of fixed resistors and I have these values: R621 = 9.28k R625 = 0-34.14k pot. This gives me voltage from 13.65v to 53.9v. If I increase the max resistance of R625 I can achieve higher voltage. *All values measured with a Fluke 17...
by jairbj
Jun 18 2021 5:42pm
Forum: Battery Technology
Topic: Emerson R48-3500e rectifier voltage adjust.
Replies: 3
Views: 145

Re: Emerson R48-3500e rectifier voltage adjust.

Find and remove the patch resistors R621 and R625, connect a 22k adjustable potentiometer at both ends of the two resistors, find and remove the patch resistor R649, rotate the 22K adjustable resistor, a miracle happens.22K adjustable range of the adjustable resistance is 5v-60v. If you change to 2...
by jairbj
Jun 17 2021 8:03am
Forum: Battery Technology
Topic: Rectifier Emerson R48-3500e/3200e MOD - Voltage Adjust - 13.65v to 53.9v
Replies: 1
Views: 91

Rectifier Emerson R48-3500e/3200e MOD - Voltage Adjust - 13.65v to 53.9v

Hi friends, finally I managed to mod my Emerson R48-3500e to make it voltage adjustable. It may work on 3200e as it is the same board. It can be adjusted down to 13.65v and I achieved a maximum of 59v (didn't test more than this). Below 13.6v it shuts down itself (maybe low voltage protection), so y...
by jairbj
Jun 04 2021 7:12pm
Forum: Battery Technology
Topic: Emerson R48-3500e rectifier voltage adjust.
Replies: 3
Views: 145

Emerson R48-3500e rectifier voltage adjust.

Hi friends, I bought an Emerson R48-3500e rectifier recently and it came programmed for 52v output. I know that I can program it for 48v with a help of a programmer but I don't have it. Also, I saw a lot of videos showing how to mod it to achieve variable voltage replacing a resistor with a potentio...
by jairbj
Jun 04 2021 9:02am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 142
Views: 30549

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

rigmo wrote:
May 26 2020 3:14pm
Display monitoring of huawei and emerson PSU.

control boards
USB serial port cable
Huawei and Emerson's control board PCBA is the same, but not universal, the software communication protocol is different.
Hi friend, could you share the communication protocol for Emerson's PSU?
by jairbj
Mar 30 2021 8:55am
Forum: Technical Reference Area
Topic: Emerson R48-3200 Service Manual
Replies: 0
Views: 425

Emerson R48-3200 Service Manual

Hi friends, does anyone have the Emerson R48-3200 Service Manual?

My unit blew today.
by jairbj
Sep 02 2019 6:14pm
Forum: EScooters/EMotorcycles
Topic: Need help identifying custom color wires on the controller
Replies: 9
Views: 1979

Re: Need help identifying custom color wires on the controller

Hi friend, any updates on that?

They'll start selling this scooter in Brazil and I'd like to get one. But, as any good DIYer I want to check how MODable it`ll be.