Hi All,
I'm looking into buying a completely new solar off-grid set up as mine has just about had its day, the batteries on my existing set up are now well over 11 years old and need "genny" help to get to "float" stage even with a good 4 to 5 hrs peak sun day.
I had read Sunking's sticky regarding set up and just wanted to run a questions by you.
1 - I have worked out that I will be looking for 5200 watt hours as daily usage.
2 - With Fudge Factor of 1.5, it converts to 7800 watt hours.
3 - I'm going to use 5 hours peak sun as an average due to location of southern Spain.....(Prepared to compensate with a back up generator for winter reduction).
4 - Panels need to be 1560 watts.....(7800w/5hrs).
5 - System option would be 24v......(between 601w to 2000w).
Battery req. 5200w x 5 day autonomy = 26000 watt hours
26000w/24v = 1083 Ah battery capacity.
6 - Charge Controller req. 1560w (panels)/24v = 65 amps.
Sunkings example indicates either 20% DoD or 5 day autonomy if I have understood correctly, there are a few methods of system sizing available on the web, some appear to advocate both.
As you can tell I am a novice as far as solar goes even though I have used it for 11 years, I just don't seem to able to do "technical"
I am intending to get at least 2 quotes using my daily usage, my real question is....am I far off the mark with what I have illustrated above as to what my requirements should be.
I would like to invest in some quality batteries, Rolls seem to be one of the better makes available here, panels have reduced greatly in price over the last 10 years and Rec seem to offer a decent panel (I have room for 8 panels if needs be). I have a FlexMax60 charge controller on my current system although the above workings seem to suggest ideally that 65 amps is required, will I need to upgrade to a Flex80?. Lastly, some advice on an inverter would be appreciated as it is not included as far as I can see on the example.
Many thank and sorry it's a bit long winded,
Mike........(Sunny Spain...atm).
I'm looking into buying a completely new solar off-grid set up as mine has just about had its day, the batteries on my existing set up are now well over 11 years old and need "genny" help to get to "float" stage even with a good 4 to 5 hrs peak sun day.
I had read Sunking's sticky regarding set up and just wanted to run a questions by you.
1 - I have worked out that I will be looking for 5200 watt hours as daily usage.
2 - With Fudge Factor of 1.5, it converts to 7800 watt hours.
3 - I'm going to use 5 hours peak sun as an average due to location of southern Spain.....(Prepared to compensate with a back up generator for winter reduction).
4 - Panels need to be 1560 watts.....(7800w/5hrs).
5 - System option would be 24v......(between 601w to 2000w).
Battery req. 5200w x 5 day autonomy = 26000 watt hours
26000w/24v = 1083 Ah battery capacity.
6 - Charge Controller req. 1560w (panels)/24v = 65 amps.
Sunkings example indicates either 20% DoD or 5 day autonomy if I have understood correctly, there are a few methods of system sizing available on the web, some appear to advocate both.
As you can tell I am a novice as far as solar goes even though I have used it for 11 years, I just don't seem to able to do "technical"
I am intending to get at least 2 quotes using my daily usage, my real question is....am I far off the mark with what I have illustrated above as to what my requirements should be.
I would like to invest in some quality batteries, Rolls seem to be one of the better makes available here, panels have reduced greatly in price over the last 10 years and Rec seem to offer a decent panel (I have room for 8 panels if needs be). I have a FlexMax60 charge controller on my current system although the above workings seem to suggest ideally that 65 amps is required, will I need to upgrade to a Flex80?. Lastly, some advice on an inverter would be appreciated as it is not included as far as I can see on the example.
Many thank and sorry it's a bit long winded,
Mike........(Sunny Spain...atm).
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