Search found 6181 matches

by john61ct
Dec 21 2018 11:39am
Forum: Battery Technology
Topic: convert positive ground negative V PSU to regular?
Replies: 11
Views: 829

convert positive ground negative V PSU to regular?

How should I install a rackmount 3kW -48V telecom power supply - note the minus - to charge a regular (no minus) 48V battery system from mains? The enclosure chassis can be floated from the internal rectifiers, and when used on a vehicle or boat, there is no Earth Ground, the whole system on both in...
by john61ct
Dec 21 2018 4:24am
Forum: Battery Technology
Topic: Random battery combination idea.
Replies: 9
Views: 867

Re: Random battery combination idea.

Winston/Thundersky/Voltronix, CALB, GBS, A123 & Sinopoly

I stop at 3.45V at the top, 2.99V at the bottom.
by john61ct
Dec 21 2018 4:21am
Forum: Battery Technology
Topic: 3s or 4s for 12v battery
Replies: 25
Views: 7882

Re: 3s or 4s for 12v battery

4s LFP
by john61ct
Dec 21 2018 12:46am
Forum: Battery Technology
Topic: Flexible charger setup 24/48Vdc / 100-240Vac, 2200+W
Replies: 4
Views: 622

Re: Flexible charger setup 24/48Vdc / 100-240Vac, 2200+W

Talking to myself here, did I violate a rule or something? I am yes a noobie virgin on much electrickery basics, especially AC, and yes, I will at some point hire a pro "sparkie" to help assure safety #1. I am looking to create a powerful high-current - but safe - charging setup on the che...
by john61ct
Dec 18 2018 3:01pm
Forum: Battery Technology
Topic: Flexible charger setup 24/48Vdc / 100-240Vac, 2200+W
Replies: 4
Views: 622

Re: Flexible charger setup 24/48Vdc / 100-240Vac, 2200+W

Fallback plan is a couple of "IBM 835W" PSUs series'd, plus also carrying an ESP120 as well 8-( , a kludge I'd really rather avoid. 3 configurations depending on upstream available: A. One 835W PSU on its own, converter-boosted up to 13.8V output @60.5A, will run off 110AC pulling under 8A...
by john61ct
Dec 18 2018 2:54pm
Forum: Battery Technology
Topic: Flexible charger setup 24/48Vdc / 100-240Vac, 2200+W
Replies: 4
Views: 622

Flexible charger setup 24/48Vdc / 100-240Vac, 2200+W

Reco's requested, requirements in priority order, fantasy "ideally"s at the bottom. Top quality regulated stable voltage DC output from possibly dirty mains input, Capable of running safely in an off-grid no-true-ground context like marine- or wheeled-vehicle-based generators. Ground may s...