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Solar Energy, A Complement To FTA - Satellite TV Technology (377) - Nairaland

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UPS Back-up, Also A Complement To FTA / FTA Frequency / Cctv Installation A Complement To Fta And Solar Energy (2) (3) (4)

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Re: Solar Energy, A Complement To FTA by sharks776(m): 1:43pm On Mar 25, 2018
NiyiOmoIyunade:
If you are sure your 40A E-Smart CC is rated for 100v and is indeed capable of MPPT tracking and battery charging/power output then;

Connect two 270w panels in series to produce 540watts max let us call this ARRAY1

then

Connect the 270w and 250w panels in series to produce 500watts max (Yes 500watts) let us call this ARRAY2.

See attached diagram although my drawing is rather crude.

Then connect ARRAY1 and ARRAY2 in parallel to make a 1,040watts 48v nominal PV array.

If you are not sure what to do at any point then please call for expert help.



Oga niyi I have a kweshon, in the bolded, so we can actually mix diff watt of PV? Cuz my setting as said earlier consist of 6pcs 130watt 2*3 (3 arrays) total 780watt. So can I buy 2pcs 260watt PV and make it the the 4th and 5th?
Re: Solar Energy, A Complement To FTA by pranil(m): 2:52pm On Mar 25, 2018
duwdu:


Please share at least one link to the product page.

........
P34c3
.....
...

It has been posted by me earlier LG dual cool and Daikin inverter range
https://www.fouanistore.com/lg-products/lg-appliances/lg-air-conditioners/lg-gencool-dual-inverter-1.0hp-clone/

https://www.deluxe.com.ng/air-conditioner/daikin-air-conditioner-inverter-r410-9000-btu1hp-ftxv-25av1

1 Like

Re: Solar Energy, A Complement To FTA by pranil(m): 3:00pm On Mar 25, 2018
NiyiOmoIyunade:


Again most offgriders abroad keep a small backup Gen for emergency power just as Oga DMerciful said. Just last month, I bragged to one of my sceptical clients that if I had NGN3Million to spend today, I would certainly apply it towards getting a Lithium battery bank and 1000w more in PV panels vs. using it to buy a 20kva Diesel Gen.

Such is the level of confidence I have come to have in the sustainability of solar power and the offgrid life.



Despite having a lithium bank I do keep around a DC Generator capable of charging at 2.5 KW ( 50 AMP DC) The gen switches off once the battery is full ( charge current below 10 amps) -

Planning to convert it to GAS to avoid the hassle of petrol. Purposefully bough a manual start to avoid batteries cheesy- My 20 KVA generator requires it's own solar panel to keep the starter battery charged. It has been used for 30 hours since last August most of it maintenance runs

http://www.geargb.co.uk/product/3010-BRIG-95/BandS_XR950_Series_Frame_Mount_LPG_Propane_Conversion_Kit_(Dual_Fuel)

In fact this solution may the best for small residential systems as you get best of both worlds. Clean uninterrupted power from Inverter ( no changeovers) and lower fuel bills as the gen either runs at full capcity only when charging battery - itis a small 200 C engine

Re: Solar Energy, A Complement To FTA by pranil(m): 3:02pm On Mar 25, 2018
dapsyra:
Today will go down in history as my poorest harvest since I ventured into renewable energy more than 10years ago.

There was just NO SUN in Abuja today. It rained almost all day.

I managed to harvest a meagre 3.000kWh ==> an efficiency of 0.667kWh/kW.

I have never had it so bad!

you can always check actual solar insolation from my weather monitor ( installed in Wuse 2)

https://www.wunderground.com/personal-weather-station/dashboard?ID=IABUJA3

Re: Solar Energy, A Complement To FTA by pranil(m): 3:04pm On Mar 25, 2018
ANEB:
Is there anyone in the house using this battery?

LiFeYPO4 Lithium Iron Yttrium Phosphate Battery


I do like to know your experience and the cost.

Are they available in Nigeria ?
what about BMS
otherwise the BLUENOVA and freedomwon are better SA brands with lot of users and a good record.
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:06pm On Mar 25, 2018
My Oga I hope this is not a trick/loaded question o? But in good faith, here goes...


In an attempt to make the best use of what you have available to you, you may mix panels of different ratings. Preferably the closer in age and spec and brand the better.

This is by no means ideal practice but just a practical workaround if budget constraints exist or one did not capture his requirements properly at the design stage or for whatever reason mismatched panels is what you have available.

In general, the larger the difference in panel voltage and or amperage, the more suboptimal mixing panels may be as you end up being limited by the capacity or performance of the smallest/weakest panel in a series string.

In a PWM setup where the panel voltage and battery charging voltage are closely matched, you may have several mismatched panels in parallel without sacrificing much capacity provided all the panels are rated above a minimum voltage required to charge your batteries. Each panel will simply contribute whatever amps it can at the common system voltage. This also holds true for an MPPT setup if you have all the panels in parallel and they can provide a minimum common voltage to the CC. However you will suffer more losses as the CC may struggle to find an ideal maximum power point for several different panels with different ratings and specs.

With panels in series you have to be more careful e.g mixing a a 12v 150watts panel and a 24v 300watts panel in series will give you a ~36v 150watts array as the smaller panel can simply not deliver more than its rated amps. The same setup in parallel will give you a ~12v 450watt panel which may cause a short circuit or overload/current or fire if care is not taken.

Again tracking a maximum power point for a mixed array of mismatched panels will be difficult if not impossible for an MPPT CC hence the solution usually recommended is to group the panels as close in specs as possible and place each separate group of panels on a separate CC.

For your specific scenario, I believe your 130w panels are nominal 12v and having them in series makes 24v 130w and you now want to combine new 24v 260watt with them. Because your battery system is nominal 24v and you have this minimum common voltage across your panels you will basically have 24v panels capable of ([130watts × 3] + [260watts × 2]) = 24v 910w array. This would appear to work but would likely give you suboptimal results (you may not realise all of the 910watts potential).

Your best bet is still another CC to place the 260w panels on. You could also sell off the old 130watts panels and start from a clean slate.


sharks776:


Oga niyi I have a kweshon, in the bolded, so we can actually mix diff watt of PV? Cuz my setting as said earlier consist of 6pcs 130watt 2*3 (3 arrays) total 780watt. So can I buy 2pcs 260watt PV and make it the the 4th and 5th?
Re: Solar Energy, A Complement To FTA by sinistrian(m): 3:07pm On Mar 25, 2018
pranil:


you can always check actual solar insolation from my weather monitor ( installed in Wuse 2)

https://www.wunderground.com/personal-weather-station/dashboard?ID=IABUJA3



Thank you for this pranil. Any endpoint/api i can integrate into my own monitoring system?
Re: Solar Energy, A Complement To FTA by sinistrian(m): 3:14pm On Mar 25, 2018
I just finished constructing my Low-Battery disconnect device (actually it's just a pair of relays) and testing it now. It will be controlled by a BMV-702, but i'm simulating the DC voltage from a 7ah battery. Looks like it's working pretty well.

7 Likes

Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:18pm On Mar 25, 2018
Please between the LG and the Daikin inverter AC, which would you say performs better overall for the 1hp units?

I am about to pull the trigger on buying my first inverter AC and would be very glad to benefit from your experience.



pranil:


It has been posted by me earlier LG dual cool and Daikin inverter range
https://www.fouanistore.com/lg-products/lg-appliances/lg-air-conditioners/lg-gencool-dual-inverter-1.0hp-clone/

https://www.deluxe.com.ng/air-conditioner/daikin-air-conditioner-inverter-r410-9000-btu1hp-ftxv-25av1





1 Like

Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:32pm On Mar 25, 2018
Oga Pranil.

To my mind, your decision to keep 2 backup generators is more of multiple points of redundancy vs. necessity. What with at least 3 different battery banks incl. 48v 200ah Lithium and 4 or more inverters, I struggle to see how you could run out of battery backup on a good day grin

More like you just incorporated multiple failsafes and layers of redundancy in your system design as a super Pro-DIYer.

For the petrol to gas/propane conversion kits, we have quite a few local alternatives here in Naija and Ghana that retail under 30k all in - they were all the rave a year or two ago. I just found a random link online now

https:///amuwo-odofin/home-appliances/3-8-10kva-dual-fuel-conversion-gas-kit-for-lpg-generator-5257294.html.

In my case I have an 8kw petrol gen. In the last 1 year, I only use it to give batteries a top up charge before we take them to clients to install or more recently borrow out to my neighbors when their own generator breaks from constant (ab)use grin.

In fact such little use did it see that the starter battery sulphated and died after 2 years and it only came on on rare occasions.



pranil:


Despite having a lithium bank I do keep around a DC Generator capable of charging at 2.5 KW ( 50 AMP DC) The gen switches off once the battery is full ( charge current below 10 amps) -

Planning to convert it to GAS to avoid the hassle of petrol. Purposefully bough a manual start to avoid batteries cheesy- My 20 KVA generator requires it's own solar panel to keep the starter battery charged. It has been used for 30 hours since last August most of it maintenance runs

http://www.geargb.co.uk/product/3010-BRIG-95/BandS_XR950_Series_Frame_Mount_LPG_Propane_Conversion_Kit_(Dual_Fuel)

In fact this solution may the best for small residential systems as you get best of both worlds. Clean uninterrupted power from Inverter ( no changeovers) and lower fuel bills as the gen either runs at full capcity only when charging battery - itis a small 200 C engine
Re: Solar Energy, A Complement To FTA by pranil(m): 3:32pm On Mar 25, 2018
sinistrian:

Thank you for this pranil. Any endpoint/api i can integrate into my own monitoring system?

basic data -

<a href="http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=IABUJA3"><img src="http://banners.wunderground.com/cgi-bin/banner/ban/wxBanner?bannertype=pws250_metric&weatherstationcount=IABUJA3" width="250" height="150" border="0" alt="Weather Underground PWS IABUJA3"></a>

or API - be7fc5493e144f07 ( https://www.wunderground.com/weather/api)

If you find a suitable application let me know as most of them don't show solar DATA - I resorted to using WEEWX ( http://www.weewx.com/) on raspberry pi and remote VNC whenever required . The vnc acess allows me to check ICC for ipower and victron venusGX in one location

Re: Solar Energy, A Complement To FTA by pranil(m): 3:35pm On Mar 25, 2018
sinistrian:
I just finished constructing my Low-Battery disconnect device (actually it's just a pair of relays) and testing it now. It will be controlled by a BMV-702, but i'm simulating the DC voltage from a 7ah battery. Looks like it's working pretty well.

I used to use SCR for my generator changeover but they tend to get pretty hot and are quite lossy ( apart from switching surges)

Victron has a product called battery protect which does the same thing around 55,000 NGN

https://www.victronenergy.com/battery_protect/battery-protect
Re: Solar Energy, A Complement To FTA by NiyiOmoIyunade(m): 3:36pm On Mar 25, 2018
Nice one Sir.

Does this disconnect the loads on the AC or DC side?

The wiring does not look very beefy to carry DC amps.

I have been looking for a DIY device such as this for a long time but alas never found the time to make one up or perhaps my power electronics skills have gone rusty grin

Will reach out to you privately to discuss further.


sinistrian:
I just finished constructing my Low-Battery disconnect device (actually it's just a pair of relays) and testing it now. It will be controlled by a BMV-702, but i'm simulating the DC voltage from a 7ah battery. Looks like it's working pretty well.
Re: Solar Energy, A Complement To FTA by pranil(m): 3:38pm On Mar 25, 2018
NiyiOmoIyunade:
Please between the LG and the Daikin inverter AC, which would you say performs better overall for the 1hp units?

I am about to pull the trigger on buying my first inverter AC and would be very glad to benefit from your experience.




daikin is approximately 10 % more efficient and much quieter - LG has more gimmicks including a phone app ( only for troubleshooting ) Also LG looks more futuratsic with white LED display behind panel while daikin has usual green red blue LED's


I ended up fitting bedrooms with Daikin and Parlour with LG - I have total 4 ac's running from my Ipower inverters

3 Likes

Re: Solar Energy, A Complement To FTA by pranil(m): 3:52pm On Mar 25, 2018
NiyiOmoIyunade:
Oga Pranil.

To my mind, your decision to keep 2 backup generators is more of multiple points of redundancy vs. necessity. What with at least 3 different battery banks incl. 48v 200ah Lithium and 4 or more inverters, I struggle to see how you could run out of battery backup on a good day grin

More like you just incorporated multiple failsafes and layers of redundancy in your system design as a super Pro-DIYer.

For the petrol to gas/propane conversion kits, we have quite a few local alternatives here in Naija and Ghana that retail under 30k all in - they were all the rave a year or two ago. I just found a random link online now

https:///amuwo-odofin/home-appliances/3-8-10kva-dual-fuel-conversion-gas-kit-for-lpg-generator-5257294.html.

In my case I have an 8kw petrol gen. In the last 1 year, I only use it to give batteries a top up charge before we take them to clients to install or more recently borrow out to my neighbors when their own generator breaks from constant (ab)use grin.

In fact such little use did it see that the starter battery sulphated and died after 2 years and it only came on on rare occasions.



The 20 KVA comes with the house so cannot be removed ( plus have to maintain it ) angry


My daily consumption is almost 50-70 Units Main house, BQ with two rooms kitchen plus security quarters -
It's like four families under one system ( i support my neighbor with water pumping and booster also smiley )

Don't look at the solar share as I keep my system in ESS mode with keep batteries charged mode so solar and battery used only when the grid fails - and the contributions from 10 KVA inverters is not captured
My dilemma is the NEPA is too low @22 NGN to justify running down battery cycles. especially when the NEPA is paid by the company

And yes all my bulbs, water pumps fridges etc are maxed out in terms of energy efficiency including switching off automatically on schedule or movement except the Plasma TV which the madam of the house refuses to change smiley


The Nigeria models for LPG are generic ones and will either run the engine too lean ( overheat) or too rich ( more consumption) There are many on Konga some as low as 7000 NGN

The model I posted is customized with the JET size for exactly the engine and frame size and does not void the warranty by Brigss and Stratton
and hopefully will not have any leakage issues
http://www.briggsandstratton.com/lam/pt/support/faqs/do-you-offer-any-conversion-kits-for-propane


I had the same problem with my generator batteries before. Now I use a small 20-watt panel with tiny charge controller. The added advantage it that the battery runs a small LED bulb( using charge controller Load side) in the night keeping the generator room lighted up for free smiley


https://www.aliexpress.com/item/12V-3A-Auto-Solar-Panel-Charge-Controller-Battery-Charger-Regulator-PWM-L057-New-hot/32835425848.html

Re: Solar Energy, A Complement To FTA by sinistrian(m): 4:01pm On Mar 25, 2018
NiyiOmoIyunade:
Nice one Sir.

Does this disconnect the loads on the AC or DC side?

The wiring does not look very beefy to carry DC amps.

I have been looking for a DIY device such as this for a long time but alas never found the time to make one up or perhaps my power electronics skills have gone rusty grin

Will reach out to you privately to discuss further.


The disconnect happens on the AC side (inverter output)
Re: Solar Energy, A Complement To FTA by pranil(m): 4:05pm On Mar 25, 2018
sinistrian:

The disconnect happens on the AC side (inverter output)

if anybody is interested I have a similar device from my SUKAM days which allowed to maximize solar use based on battery voltage

https://www.aliexpress.com/item/Q4500W-solar-controller-with-intelligent-dual-power-transfer-function-24V-AC220V-240V-Free-shipping/32745597109.html
Re: Solar Energy, A Complement To FTA by pranil(m): 4:07pm On Mar 25, 2018
pranil:


if anybody is interested I have a similar device from my SUKAM days which allowed to maximize solar use based on battery voltage

the main limitation is 500 watt but I am sure the circuits can be modified to run external power contactors

https://www.aliexpress.com/item/Q4500W-solar-controller-with-intelligent-dual-power-transfer-function-24V-AC220V-240V-Free-shipping/32745597109.html



Re: Solar Energy, A Complement To FTA by duwdu: 4:08pm On Mar 25, 2018
pranil:


It has been posted by me earlier LG dual cool and Daikin inverter range
https://www.fouanistore.com/lg-products/lg-appliances/lg-air-conditioners/lg-gencool-dual-inverter-1.0hp-clone/

https://www.deluxe.com.ng/air-conditioner/daikin-air-conditioner-inverter-r410-9000-btu1hp-ftxv-25av1


Ah, thank you.

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P34c3
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Re: Solar Energy, A Complement To FTA by sinistrian(m): 4:36pm On Mar 25, 2018
pranil:


basic data -

<a href="http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=IABUJA3"><img src="http://banners.wunderground.com/cgi-bin/banner/ban/wxBanner?bannertype=pws250_metric&weatherstationcount=IABUJA3" width="250" height="150" border="0" alt="Weather Underground PWS IABUJA3"></a>

or API - be7fc5493e144f07 ( https://www.wunderground.com/weather/api)

If you find a suitable application let me know as most of them don't show solar DATA - I resorted to using WEEWX ( http://www.weewx.com/) on raspberry pi and remote VNC whenever required . The vnc acess allows me to check ICC for ipower and victron venusGX in one location




Thanks for the link. I'm using a local install of emoncms, so I wrote some php scripts to extract data from my inverter and feed into it. The wunderground api will be useful to compare actual insolation with production from my panels
Re: Solar Energy, A Complement To FTA by sinistrian(m): 4:38pm On Mar 25, 2018
pranil:


I used to use SCR for my generator changeover but they tend to get pretty hot and are quite lossy ( apart from switching surges)

Victron has a product called battery protect which does the same thing around 55,000 NGN

https://www.victronenergy.com/battery_protect/battery-protect
Yeah, I saw it too. It was the price that chased me away grin
Re: Solar Energy, A Complement To FTA by davodyguy: 4:47pm On Mar 25, 2018
NiyiOmoIyunade:
If you are sure your 40A E-Smart CC is rated for 100v and is indeed capable of MPPT tracking and battery charging/power output then;

Connect two 270w panels in series to produce 540watts max let us call this ARRAY1

then

Connect the 270w and 250w panels in series to produce 500watts max (Yes 500watts) let us call this ARRAY2.

See attached diagram although my drawing is rather crude.

Then connect ARRAY1 and ARRAY2 in parallel to make a 1,040watts 48v nominal PV array.

If you are not sure what to do at any point then please call for expert help.



Please see below image

Re: Solar Energy, A Complement To FTA by duwdu: 4:59pm On Mar 25, 2018
I just found this (probably more for noobs such as yours truly... wink ) :

https://www.gaisma.com/en/location/lagos.html

In addition to (a) "Sunrise, sunset, dawn and dusk times, table" data, please scroll further down to see...

(b) Sun path diagram;
(c) Solar energy and surface meteorology; and
(d) Basic [geographic] information.

Other significant Nigerian cities are captured one level higher, at:

https://www.gaisma.com/en/dir/ng-country.html

Yes, you got it right, the parent site is:

https://www.gaisma.com/en/

........
P34c3
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...
Re: Solar Energy, A Complement To FTA by kiekie1(m): 7:04pm On Mar 25, 2018
Hello all,
Happy palm Sunday to all my xtian forumites and clients in here .. Wishing you all a fruitful week ahead - more money to your bank accounts smiley ! Remain blessed !!!

1 Like

Re: Solar Energy, A Complement To FTA by Janyves(m): 10:28pm On Mar 25, 2018
Greetings to all bright minds up in here.... I've got a fairly used inverter up for sale
Capacity ... 2kva (1200W)
Battery voltage .. 24V
A.c output... Modified sine wave
Charge current... 10A
Rugged and sips easy on batteries( low idle consumption)
Goes up for 45 bucks

Re: Solar Energy, A Complement To FTA by Obascoetubi: 12:27am On Mar 26, 2018
pranil:


Despite having a lithium bank I do keep around a DC Generator capable of charging at 2.5 KW ( 50 AMP DC) The gen switches off once the battery is full ( charge current below 10 amps) -

Planning to convert it to GAS to avoid the hassle of petrol. Purposefully bough a manual start to avoid batteries cheesy- My 20 KVA generator requires it's own solar panel to keep the starter battery charged. It has been used for 30 hours since last August most of it maintenance runs

http://www.geargb.co.uk/product/3010-BRIG-95/BandS_XR950_Series_Frame_Mount_LPG_Propane_Conversion_Kit_(Dual_Fuel)

In fact this solution may the best for small residential systems as you get best of both worlds. Clean uninterrupted power from Inverter ( no changeovers) and lower fuel bills as the gen either runs at full capcity only when charging battery - itis a small 200 C engine
can u use this generator with solar without fuel?
Re: Solar Energy, A Complement To FTA by bigrovar(m): 9:24am On Mar 26, 2018
NiyiOmoIyunade:
I have this same argument with some stubborn clients who want to pay for a minimalist system (read small battery bank) but abuse it regularly with heavy loads - they stubbornly insist this is the only way (undersizing battery bank and other aspects of the system) that makes financial sense.

My current battery bank is sized for at least 3 days of autonomy even with overnight AC use. So far I have yet to call upon my generator in the last 6 months even on the worst of days, it would take at least 4 successive days of rains and cloudy weather to drain my battery bank completely and by day 2 of low sun and cloudy weather I would have stopped using overnight AC on account of the cool weather and thereby bought myself a few more days of battery backup. grin

The few clients I have who have taken my advice at the design stage have all practically forgotten how the PHCN side of their house works and have certainly forgotten completely how to put on their generators grin

Again most offgriders abroad keep a small backup Gen for emergency power just as Oga DMerciful said. Just last month, I bragged to one of my sceptical clients that if I had NGN3Million to spend today, I would certainly apply it towards getting a Lithium battery bank and 1000w more in PV panels vs. using it to buy a 20kva Diesel Gen.

Such is the level of confidence I have come to have in the sustainability of solar power and the offgrid life.



The down side of having that much battery capacity (relative to daily consumption load of cause) is you most have the capacity to fully charge them at the first chance (first clear weather day) this might not be as easy as you might think no thanks to battery inefficiencies. if your solar panels are not adequately sized you might end up in the battery being in constant state of being under charged which will lead to sulphation. For long life of your battery, your daily use should align the capacity of your PV to refill in one day of charge.

Fortunately, nature has a way of balancing things out, myself was affected by the bad weather but the good thing is temperature was generally cool hence less need to use energy for climate control, also the panels got much needed cleaning grin ... I take the last friday weather as an ominous sign of things to come. Climate is changing and we might see much worse weather come May - June - July - August.

I use a weather app called Weather radar on android and it is the most accurate at weather prediction. It did predict that Friday would get 0 hours of sunshine and 90% chance of rain. This made me to prepare by going on a lean mode on thursday. Thankfully the app is predicting 5% chance of rain and 9 hours of sunshine today and tomorrow but thursday this week is a bit tricky. You can download the app here https://play.google.com/store/apps/details?id=de.wetteronline.wetterapp&hl=en
Re: Solar Energy, A Complement To FTA by ANEB(m): 11:01am On Mar 26, 2018
Thanks brother.
Checking it out now..
pranil:


Are they available in Nigeria ?
what about BMS
otherwise the BLUENOVA and freedomwon are better SA brands with lot of users and a good record.
Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 12:28pm On Mar 26, 2018
GeorgeD1:


this is one of the major challenges of solar - cloudy/rainy weather. however, with proper
system sizing, it can be easily overcome. that is why the rule of thumb for an ideal battery
bank size is 3 days minimum backup. this takes care of days when there is less than adequate
sunshine, rainy weather and total blackout just like dapsyra experienced in abuja recently.
but as always, the drawback seems to be cost. who can afford to buy so many number of batteries
to achieve that level of autonomy? and what about the solar panels that goes with it?
too many questions but few answers...

Exactly! I'd rather buy more panels than batteries, but then again, one needs the extra storage cause with more panels, you'd just be losing so much power when batteries are full in good weather and then you can't even run for long on that limited battery storage if the weather is really bad, sigh sad

Hopefully, the price of lithium phosphate batteries keeps dropping. Right now, one can get 12V 100ah LifePO4 Battle Born Batteries for $950.
https://battlebornbatteries.com/shop/12v-lifepo4-deep-cycle-battery/

100 Amp Hour, 12 Volt Battery
LiFePO4 Chemistry
3000- 5000 Cycles
100 Amp Continuous Current
200 Amp Surge Current (30 Seconds)
1/2 second surge for higher loads
Drop in Replacement for Lead Acid Batteries
Acceptable Voltages 14.4 – 14.6 for bulk charging
3 Year Warranty
Designed and Assembled in the USA
12.75 x 6.875 x 9 (L x W xH)
29 lbs

Just imagine if this can get below $500, then most people can really have power independence.

It would be so nice to put on the Gen and drop 50amps directly into a 100ah lithium battery and have it charged up in just two hours, as opposed to spending like 10 hours charging on 10amps max for the lead acid counterpart and then having to go through the whole 3 stage bulk, absorption and float stages.

I will keep monitoring the prices so that when my batteries die in a couple of years, I can decide if it's economical for me to make the switch to Lithium.

2 Likes

Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 12:30pm On Mar 26, 2018
Pharyn:
Kindly share the source, please.
Thanks.


http://www.nigeria.climatemps.com/index.php

it only has a limited coverage of Nigeria sadly, like only 10 states.
Re: Solar Energy, A Complement To FTA by NoMoreTrolling: 12:51pm On Mar 26, 2018
NiyiOmoIyunade:
Please is this 'variable tonnage' inverter AC different from the normal LG inverter AC we all know?


Not really sure if all LG inverter types are the same, was just watching a YouTube presentation for this particular air conditioner.

However though, all inverter air conditioners are somewhat variable tonnage, since they all vary compressor speed, hence vary compressor input power (watts), thus, varying cooling output (btus) based on input watts.

The question is if the manufacturer puts that control in your hands, or just does it automatically through a processor.

So as an example, with a typical inverter AC, once the set temperature is reached, instead of shutting down the compressor like a conventional AC, it just reduces the power to the compressor, making it run at a reduced speed, reducing refrigerant pressure and temperature of the evaporator to match the set temp. This is all done with a processor with no user input beyond temperature setting. Now with this LG on YouTube, they give you the ability to manually control the compressor speed, instead of having it all done with a processor. So in essence, you can turn a 12,000btu air conditioner to about a 5,000btu air conditioner using the remote control.

Obviously, it would take much longer to cool at the lower power(btu) setting, but when you are load sizing and every watt saved helps, then this does come in handy to be able to pick and choose just how much power your air conditioner uses at any given moment, yet still enjoy a relatively cool environment.
Re: Solar Energy, A Complement To FTA by scamjudge: 6:05pm On Mar 26, 2018
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