Hi,

I am wanting to install a Mecer 5KVA inverter with 10 x 445W Panels.  Can you suggest to me a balanced system of panels to KW with the correct amperage and wattage battery in lithium iron (Lifepo4) 

We need to split the panels to each side of the roof to optimise the sun's rays throughout the day.  Part of the roof gets morning sun and the other apex get afternoon sun.  Should we scrap this Mecer 5KVA and go for a Sunsynk 8KVA, 10 x 590W Canadian Panels with the same battery?  

Is there anyone willing to assist me with a schematic for the wiring into my house system which at present has a change over switch and generator system.  I would like the generator system to stay and the solar added.  The generator will not be used to charge the solar system.  Would we need 2 change over switches to achieve this?

Many thanks to whoever can assist me.

Guy P

Sup Guy P

4 minutes ago, Guy P said:

Can you suggest to me a balanced system of panels to KW with the correct amperage and wattage battery in lithium iron (Lifepo4)

I can't make much sense of this but it is important to abbreviate kilo with a small "k". 

 

5 minutes ago, Guy P said:

Should we scrap this Mecer 5KVA and go for a Sunsynk 8KVA, 10 x 590W Canadian Panels with the same battery?  

I think one gets older and newer Mecers, so you would have to be specific about the model. Why would you jump to an 8kW Sunsynk?

The Mecer is a PF1 which has been given to us without cost, but we were looking at installing an 8KVA  Not too sure what the difference between the two sizes will give us. We would like to be off grid as much as possible. 

We have used the Mecer 2400VA (1440W) inverters in our home for some time now and find that they are not all that reliable

8 minutes ago, frivan said:

Sup Guy P

I can't make much sense of this but it is important to abbreviate kilo with a small "k". 

We are not sure what size battery is best for the amount of panels and how to work out the kW needed

 

 

 

10 minutes ago, Guy P said:

The Mecer is a PF1 which has been given to us without cost, but we were looking at installing an 8KVA 

I kill you over kilo.

That looks like an old inverter, 1 MPPT, low solar voltage, no export. I don't know how well BMS comms will work or if blending sources are possible. A Sunsynk would be 10 times better.

43 minutes ago, Guy P said:

Hi,

I am wanting to install a Mecer 5KVA inverter with 10 x 445W Panels.  Can you suggest to me a balanced system of panels to KW with the correct amperage and wattage battery in lithium iron (Lifepo4) 

We need to split the panels to each side of the roof to optimise the sun's rays throughout the day.  Part of the roof gets morning sun and the other apex get afternoon sun.  Should we scrap this Mecer 5KVA and go for a Sunsynk 8KVA, 10 x 590W Canadian Panels with the same battery?  

Is there anyone willing to assist me with a schematic for the wiring into my house system which at present has a change over switch and generator system.  I would like the generator system to stay and the solar added.  The generator will not be used to charge the solar system.  Would we need 2 change over switches to achieve this?

Many thanks to whoever can assist me.

Guy P

If you need to install panels across two roof sections, pointing East and West, then the ideal would be to put each set of East and West-facing panels on a separate MPPT, ie. use an inverter with two MPPT inputs. This could be a Sunsynk, but there are also cheaper options like Luxpower.

The amount of panels and battery size are difficult to suggest without understanding how much energy units in kWh your house uses, and at what times of the day, and what's the highest usage of any time. Regardless of the spec sheet of any inverter or battery, the process should start and end with understanding your needs.

To get an idea of how to wire it up, best to review the installer manual for the specific inverter. In the case of the Sunsynk it's possible to wire a generator onto the AUX port of the inverter.

Seems a waste to scrap a perfectly functional inverter. Why not try passing it on to someone who is just looking for an affordable backup option.

4 minutes ago, GreenFields said:

If you need to install panels across two roof sections, pointing East and West, then the ideal would be to put each set of East and West-facing panels on a separate MPPT, ie. use an inverter with two MPPT inputs. This could be a Sunsynk, but there are also cheaper options like Luxpower.

I just set up a Luxpower... or tried. Unless you get connectivity going to the app, you have to navigate stupid number menus similar to the Axpert menus. I am not convinced that it is worth the saving compared to Sunsynk/Deye.

10 minutes ago, GreenFields said:

To get an idea of how to wire it up, best to review the installer manual for the specific inverter. In the case of the Sunsynk it's possible to wire a generator onto the AUX port of the inverter.

Note that the frequency of the generator must be relatively stable.