unicmarket:


Good morning madam

They have done justice to the question o,
But I just want to add a little,

Your load is about 140watts altogether

And assuming your battery is 70% Depth of Discharge which means 70/100 x 200ah , 140ah usable current in 1hr

And this means your 140 watts can run for about 12 hrs

But if at worst your DOD(depth of discharge) is 50% then like they said; it will be about 7hrs backup time

So try and confirm the dod of the battery you are getting


Most people prefer to use MPPT rather than a pwm because it is more strategic in converting excess power to charge the battery, while pwm may just waste the excess power( what does that mean?) when a pwm receives 40v 5amps, from solar panels “for instance”, to charge your 12v battery, it only takes about 12v and the 5 amps even if the battery is needing more at that time, so what happens to you 28v( certainly lost)

But an MPPT charge controller or cc for short converts the excess 28v to amps so as to charge the battery more effectively
So it then charges up to 12v , 16amps (wow)
So little power loss, and your battery charges most effectively

Now to the choice of your Inverter, please be particular about the cut off voltage( am assuming it’s a power Inverter) some of them, their cut off voltage may even get too low that it can damage battery cells. By cut off voltage I mean, the voltage of the battery at which Inverter will go off when the battery battery is low.

And lastly personally I think 500watts solar power is not bad for your load, I think it’s Just good enough, you may choose to increase it, but with a good cc you will get optimum charging power.

Thanks

www.jekitech.com; whatsapp or call 08031138665

BetaTechnicians:

is the inverter pure sine wave or modified sine wave?
You don't want to run your tv or fan with a modified sine wave except some brands that seem to work well.

olaolu11:



Seems ojeysky has already answered your question.
The fan will draw power from the main battery while charging. The good thing is you won't need the main battery overnight. And as suggested change your bulb to 5 watts. If money is not much of a problem, look at a bigger inverter for future upgrade. And do not use modified sine wave. These are advise you have been given already and they are for a reason.
Can you post the specs and pix of this your rechargeable standing fan. At 15 watts(and I think I got a good fan in sturdiness and wattage at 40watts) I am interested. What is the cost. I will advise you get a meter to confirm state of charge of the battery or better still add another panel. The installer gave you the basic minimum to enable you slap any NEPA official.

* change bulb to 5 watts
* look at bigger inverter
* ensure you are not supplied modified sine wave inverter
* think about upping your panel total to at least 600 watts
* why not 60a pwm or powmr mppt(30k)
*use 10 mm wire or bigger
*ensure installer know his onions

You are good to go with the above.
Lastly get the names of the materials you are to be supplied so you won't be given anyhow products. Cost/price is another factor. Do your due diligence on that.

Penuelseun:
if you are going with the pwm cc, then you are better off with 4 × 150w solar panels instead of 2 × 250w, or better still, go for a mppt cc

mctfopt:


I can only recommend you use something higher than 500w inverter (1kw or 1.5kva) if you are planning to run a refrigerator on it. Also, you can instead get a 5w bulb instead of the 15w bulbs in view. Truly, the size of the panels may not do much in terms of replenishing lost energy of the battery considering the load you plan to run on it. Can you ramp it up for 4 nos of 250w PV and two numbers of 200ah, and get an MPPT controller, say 50A?

It is always better to get it right the first time so that you do not consider getting a second battery after four/five months of use. You can buy and keep things like PV, and other parts (like solar charge controller and inverter) if the cost is an issue. I know someone who kept 6 PVs he bought for four years before buying the battery. Today, he is enjoying his system with no issues.

olaolu11:


You have some info to supply still. How many hours will you use the TV, the fan(s), the bulbs. For example. I will use my fan for 7 hrs each day, the TV for 12 hrs and bulb(all) an average of 3 hrs per day. Then can your question be answered. As one of the gurus in the house will say, I am a novice and stand to be corrected.

ojeysky:


Including the unknown let's assume 170w total. Using 50% DoD you then have 100x12 which is 1200w÷170. You get 7hours backup time assuming the battery is full.

NIJJAking:
I have a toyota passat which i can sale to you @#230k
It is clean outside and inside , nothing to fix. I reside in sokoto

Kelvinhunta:
Am in Anambra 35k and its brand new

Abso1uteZero:


Where

Abso1uteZero:
Any stream?
Make una help me abeg

William7189:
see blew

ololadeajayi:
Come with your mechanic and drive home this rugged Toyota first body...

ololadeajayi:
Rugged Toyota Camry Orobo For Sale

Transmission: Auto

Wheel: Alloy

Location: Abuja

AC: Leaking (Compressor perfect)

Body: First Body (Never been painted)

Price: 300k

Reason for selling: To upgrade

Papers: Complete including CUSTOM PAPERS

Things to fix:

1. Door Opening Handles
2. Power Steering Pump. (Still drives smoothly but a little bit hard while not driving)

Call/Whatsapp: 0-9-0-1-6-5-2-5-2-4-4