₦airaland Forum

VULCAN:
@feflo

I am amazed and gladdened at your dedication to your work and also to your customers. Kudos.

Kindly clarify some issues for me.

1. I have not heard good reports about locally made inverters. Reports of catching fire and so on,

Yet I notice you provide a 1yr warranty on locally made inverters yet only 6 months on imported. Pls explain why.

2. The appliances i wish to cover are around 2300W, Of which less than half will run constantly. What capacity inverter do I need and how many batteries?

Please respond with a quote so that I can make my decision.

Thanks

martinz1:
What's d price of the 24v apc

Im2Busy2Bother:
Thanks a lot. Thoughts as much too.

Any idea it's max DC charging current?

Deluxe8000:
pls how much last for the ups inverter apc 12v and how can i get it today. i live in lagos. thanks.08158952934

temizeee:
can dis power a deep freezer of about 185 watt(+compressor surge) ?

Im2Busy2Bother:
Does Safepower have a 24V system higher than 1.5kva?
Someone said he has a 3.5kva 24v system... is there any such system? Thanks

cool318:
So we still have Good & Reliable People in Nigeria. Feflo you are a Man of your Words. Recieved them in Perfect Working condition. They have already started Charging my Batteries at an Alarming Charge rate. Waooooh.
Kudos Feflo Engineering

Trippledots:
can you supply me battery chargers? lets discuss pls. how do I contact you?

Trippledots:
feflo

do you still sell those type of inverters you started this thread with? I noticed the pix u upload now have diff brands other than those ones. what's y0ur experience using/installing those ones? complaints.
thanks.

cool318:
Yes Boss, will try but you know that am still a Learner.
I will go for the 24v 50amps cos the Battery in my custody is 200 Ah. How much is it even if you dont have it now? No where else you can procure it for a client?

cool318:
Thanks Boss. Will upload pics of mine when through.

But how much do you sell the 12v 50 amps charger? Cos am really going to need it. Hope its reliable & Durable. Is it a Smart Charger with LCD screen?
Thanks

cool318:
Thanks a Million for your kind & prompt response.
The Batteries i want to use is 2(100AH)= 200AH
I will like to know if there is any other component upgrade on the PCB that will make it work for Long like a typical Inverter? I will continue 2moro.

feflo:
@cool318 Many thanks, it gladdens my heart to know that you have made attempt at doing it yourself and
i really salute your efforts too.

1. 2pcs. of 12vdc batteries connected to give 24vdc. You did not state the AH rating of the batteries. I'll assume
200ah for this example. The stored energy/power = 24vdc x 200ah = 4800whrs. That value
gives you the total potential wattage of the batteries but in practice it is far less than
that. Your inverter is not 100% efficient, the batteries are not 100% efficient, the cables
have their losses along the line and so many other losses to be considered.
If i am to calculate the amount of time a total load of 100watts will run on a 24vdc, 200ah
Battery bank.
Battery stored power = 24vdc x 200ah = 4800whrs.
Batteries DoD of 80% = 4800whrs x 0.8 = 3840whrs
Fudge losses ( other losses) = 3840whrs x 0.75 = 2880whrs
Run time of 100watt load = 2880whrs/100w = ~ 28hours.
2. Locating the DC terminals can be a little tasking, it depends on the make of the UPS you are
converting like bluegate, maxtron, mercury, APC etc. I have attached two pictures of a bluegate
and Binatone UPS indicating the DC points on the PCB. Check the picture and compare with your own
PCB.
N.B To make it easier for you, connect the negative leg of the fan to the negative battery
cable and look for the positive terminal on the PCB. Remember, you must connect it to a point that
will cut off when you switch off the UPS/INVERTER otherwise your fan will continue working
until you disconnect the battery.
3. The size of cable depends on the UPS/INVERTER size, for a 650va, 2.5mm is ok but for a
1.5va that will carry a fridge 4mm is ideal. The DC cables from the UPS goes to the battery
so also the charger cable.

cool318:
Hi Engr Feflo, i salute you for your spirited efforts to Humanism.
I have a Maxtron 24v (2batteries). What is its maximum output wattage.
I have tried locating the DC terminals on the PCB but couldnt. Can you throw more light on that area?
Thirdly, the two terminals to be extended, is it better to use 2.5mm flex or Single strand wire & where will it be connected ( is it on the Charger or Battery.
Thanks a lot