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gooseberry

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gooseberry last won the day on July 20

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  1. Just remember that the grid is used at a much lower efficiency than with a grid tied inverter as it's converted to DC and then back to AC.
  2. I don't see what you're describing. There is only a small chunk missing of the ideal bell curve PV output so looks like all available PV is being used. There simply wasn't enough of it to power the loads and charge the batteries to 100%. I'd say that bite out of the curve was either a cloud passing or a shadow on a panel. In the "off grid" example it looks like it drops at exactly the same time and to the same W shortly before the batteries reach 100% and the PV output drops too match the load - so a passing shadow is my best best. Now what you may or may not want is for the battery to carry the load when the grid is present when the sun goes down. You'll be able to set the 'back to grid' SOC somewhere after which it will keep the battery above that at all times if the grid is present. Above that it will only charge higher if there is excess PV power available. You may want to set it lower, as it is currently, to minimise your Eskom bill, or higher to always be ready in case there is a blackout.
  3. Unless someone jippo'd the prepaid meter and connected the essential loads before the meter.
  4. Sure, but many people will meet those. OP's setup fits the first two and many people have sloped roofs that are symmetrical. If you have a flat roof you can use stands to angle them however you wish.
  5. My bad, thought the Growatt had 2 MPPTs. If Imp is 13A it's probably better to go for the 8kW rather than the 5kW Deye. Although E/W on a single MPPT is not unheard of, and if replacing the inverter is not a possibility, may even be the optimum solution. https://www.energymatters.com.au/images/news/2013/east-west-solar-paper.pdf
  6. No need for more panels if you just want to keep your batteries full. Your panels are likely connected 2s2p. They just need to be connected 4s.
  7. The Growatt will still use all 12, it will just clip at 5.5kW in the middle of the day. In the mornings and evenings, if it's overcast, if your panels are not angled optimally or if they're in a E/W configuration the sixth panel will still add to your usable power. Wouldn't get a whole new inverter for that theoretic 1kW extra you maaay get in optimal conditions.
  8. We use the Hoffman H6000 on a Multiplus 24/3000. It works well.
  9. If you can, set it to use cold water only. We have a Bosch front loader washing machine on a 3kVA Multi with 1.8kWP and 5kWh off-grid and it barely makes a dent as long as you don't heat water.
  10. The power curves are flat up to well over 30V per panel so that shouldn't be an issue https://www.victronenergy.com/blog/2020/02/20/pv-panel-output-voltage-shadow-effect/
  11. Perhaps the installer fibbed a bit in the application, or it was an oversight by the reviewer? Either way, it's not strictly compliant.
  12. This forum would be wrong, the documentation is very clear on this.
  13. You can have more PV if they're only connected to an off-grid circuit. But you can't grid tie a larger peak generation capacity than those limits.
  14. https://resource.capetown.gov.za/documentcentre/Documents/Procedures%2C guidelines and regulations/Requiremenst for Samll-Scale Embedded Generation.pdf NRS 097 -2 -1 It's the GENERATION capacity that is limited, not the charge current
  15. Even if you're not exporting, if your main breaker is 60A you're limited to 3.5kW generation capacity on Eskom or several municipalities like CoCT. 4.6kW if you're on a 80A breaker.
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