Temperature Compensation Settings?

[grgdgreek]

Thank you:-)

[TomW]

Just now noticed that "Temperature" was spelled wrong in the opening post. Fixed it so it will show up in searches for temperature better.

Tom

[ClassicCrazy]

It is good to know that if it works that way, but does it? I read somewhere that Bulk and Absorb mode are same for Classic 150.

Bulk gives all available power until it gets to Absorb voltage then in Absorb it will hold the Absorb  voltage and reduce the current  until it either gets to the Absorb time setting or until Ending Amps if that is setup  - then it goes to Float Voltage.

Larry

[dgd]

When I started with design of my system I have 2 limitations. Amount of panels I can put on limited southern exposure and weight per individual battery. I purchased my panels while ago and at that time biggest panel was 235W panel. So I ended up with 3 of these since I could fit only 3 at that particular spot which is façade of the cottage. Batteries needed to go into crawl space and therefore weight limit imposed. One person should be able to carry them in and out at all times. So, system was reverse engineered according to PV array. 30Kg battery was no brainer either.

Interesting story...
Seems you are too limited in your PV generation ability. With PVs so cheap more would be nice.
Why only southern exposure? In there no SE or SW exposure or even E or W?
There has been a fair amount of discussion here on PV orientation.
What do you mean by crawl space? under cottage floor to ground or above ceiling to roof space?
Have seen ground crawl space where cells are mounted on a wheeled tray that can be pushed under space or pulled out for servicing.

dgd

[sigp2101]

Interesting story...
Seems you are too limited in your PV generation ability. With PVs so cheap more would be nice.
Why only southern exposure? In there no SE or SW exposure or even E or W?
There has been a fair amount of discussion here on PV orientation.
What do you mean by crawl space? under cottage floor to ground or above ceiling to roof space?
Have seen ground crawl space where cells are mounted on a wheeled tray that can be pushed under space or pulled out for servicing.

dgd

Yes, there are SE and SW exposure but it is too high up on the roof. It would be impossible for any maintenance needed. Crawl space is under the floor. Wheeled tray is exactly what I am going to.

[dgd]

Sigp,

Thanks for posting those pics.

Thats a really nice setup with the Classic and inverter, wiring mostly in flex/solid conduit too.
Its also a decent height crawl space, I'd be tempted to excavate/concrete a part of it so it became an almost standing space for your power room perhaps even with internal entry steps/trapdoor too.

The three solar panels seem to be a good fit, centrally placed to maintain symmetrical look to front of building. Looks like you could get a fourth or even fifth panel along the front without protruding past the end walls.

dgd

[sigp2101]

Hi technodave, was reading previous post of yours and find discrepancy I need additional explanation for.

Classic does not quite set that way......

Use these values.        -5mv  per cell.      Temp comp set point 25 C 

Classic does know how many cells

Above you are referring to Temp Set Points in deg C, and below:

First screen.      .005
Second screen.   Not disabled
EQ Comped:  no
Temp comp set point. 43.2.......ok I don't use 36 volt....my set point is 28.8....absorb set point for 24 volt Rolls-Surette & Interstate.....this is the same volts per cell

In Volts, now I am confused. What is this value? (Temp Comp Set Points) Mine is set I think around 41.

There is a learning curve here, it's going to take a while!

David

That is for sure, I am reading manuals, watching videos and these questions keep popping up like popcorns.

Thanks!

SIGP2101

[zoneblue]

Yes creative setup. Couple points worth noting. The general rule is that you dont want power electronics within 500mm of lead batterys. Theres two reasons, sparks plus hydrogen= boom. Second reason is the acid mist will cause corrosion of delicate internals. Hopefully youve got some sort of venting to stop a pool of hydrogen building up under your house!

[sigp2101]

Yes creative setup. Couple points worth noting. The general rule is that you dont want power electronics within 500mm of lead batterys. Theres two reasons, sparks plus hydrogen= boom. Second reason is the acid mist will cause corrosion of delicate internals. Hopefully youve got some sort of venting to stop a pool of hydrogen building up under your house!

There are 12 six inch vents in the walls in that basement. You can see one in the picture. They provide nice cross breeze. Eventually BB will be inside insulated box with flex hose connected to two of these vent holes on opposing sides. This project is in progress and even wiring is not done yet. Your raised valid point.

Thanks!

SIGP2101