Welcome to the Solar Collector
Brainstorming and Development Page!


 

Home

Hot Air Collector

Hot Water Project 1

Hot Water & Space Heating

Solar Electric

Solar Construction 101

FAQs

Best Collectors

Simply Solar
Sign up Calendar Latest Topics
 
 
 


Reply
  Author   Comment   Page 4 of 4      Prev   1   2   3   4
robbirobson

Registered:
Posts: 16
Reply with quote  #31 
I think this mppt has power saving option as well. I did not think of this before. I will activate it today and see what happens

Rick H Parker

Avatar / Picture

Registered:
Posts: 789
Reply with quote  #32 
It seems the mppt is draining 1 to 2 amps constantly which are not seen in the display.

This is normal. The charge controller and inverter are electronics devices, they need power to operate.
For the 24V 1VA, 2VA and 3VA models, <1 amp (<25W) is normal,  <2 amps (<50W) for the 4VA and 5VA models.

I think this mppt has power saving option as well. I did not think of this before. I will activate it today and see what happens.

It does have a power save option. It is program #4. Turning on power saving mode will turn off the inverter when there is no load or when the load is too small to detect. In power save mode. standby current will drop to <400ma (<10W) on 1VA, 2VA and 3VA models, <600ma (<15W) for 4VA and 5VA models.




__________________
Rick H Parker
Kansas, USA
Electronics Engineering Technologist
robbirobson

Registered:
Posts: 16
Reply with quote  #33 
Unfortunately with the power saving mode i cannot operate my led lights, even my ventilator and the pc it does not turn on. It only works with greater loads like my fridge or the water pump. I think i have to upgrade my battery bank the only proper solution. I don't want to switch off the controller every day because i am afraid it will damage at one point because it always resets itself when you use the switch and i think its better if it stays on all time.
At least the source has been found, the faulty battery and the mppt also draining a bit of power.
stmbtwle

Avatar / Picture

Registered:
Posts: 2,826
Reply with quote  #34 
The larger battery bank is your best bet.

An alternative low-cost solution is a smaller inverter.  If you split your system and put the lights, ventilator and PC on the small inverter it could run all the time with less "idle" consumption.  The big inverter could turn on and off for the heavier loads.

However DO NOT put both inverters on the same circuit.  One or both of them will be destroyed.

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
Rick H Parker

Avatar / Picture

Registered:
Posts: 789
Reply with quote  #35 
i cannot operate my led lights, even my ventilator and the pc it does not turn on.

How much do you know about electronics? The Led lights, PC and most likely the ventilator run off DC voltages and the power requirements are low. You could use buck converters to run then directly off the batteries. That would allow you to use the power saving mode.  Another option is to get a small inverter with a low overhead for the PC, Lights and ventilator and turn on the power save mode on the one you have now.  Two inverters on the same battery bank is doable ... do not connect the AC outputs of the two inverters together.

__________________
Rick H Parker
Kansas, USA
Electronics Engineering Technologist
Rick H Parker

Avatar / Picture

Registered:
Posts: 789
Reply with quote  #36 

I think i have to upgrade my battery bank the only proper solution.

For the same usage, a bigger bank will last longer however, I still expect you may have a heat problem, it is temperature not stale air that kills batteries.

__________________
Rick H Parker
Kansas, USA
Electronics Engineering Technologist
stmbtwle

Avatar / Picture

Registered:
Posts: 2,826
Reply with quote  #37 
Another low cost option would be to install one incandescent bulb in the lighting circuit, just enough to turn the inverter on. When you turn the lights off, the inverter goes off.  If you are already wired for standard AC, it'll only cost a couple bucks.

I think if you install the batteries a couple inches apart and allow for ventilation you'll be OK. Short of installing air conditioning, there's only so much you can do.

__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
Rick H Parker

Avatar / Picture

Registered:
Posts: 789
Reply with quote  #38 
Short of installing air conditioning, there's only so much you can do.

Root cellar ... 52° F
(11° C) no energy overhead.

__________________
Rick H Parker
Kansas, USA
Electronics Engineering Technologist
stmbtwle

Avatar / Picture

Registered:
Posts: 2,826
Reply with quote  #39 
Assuming you HAVE a root cellar, or the means to go underground.  Even then, unless you have lots of volume, the heat from the batteries would eventually raise the temperature of the root cellar.

Temperature also varies according to location.  Here it would be about 72F, assuming I could keep it from flooding.

One could also pump cold well water through a radiator, with a fan to blow the cooled air over the batteries. Then pump the water to the house for normal use.

Or put the batteries in a kiddie pool, and pump in enough water to cool the batteries...


__________________
Solar is like the wind. It may be free, but putting it to work isn't!
Willie, Tampa Bay
Previous Topic | Next Topic
Print
Reply

Quick Navigation:

Easily create a Forum Website with Website Toolbox.

 

web statistics