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2nd inverter and solar panels
shibli
Posts: 63 Forumite
Hi ,
I currently have a solar power system consisting of a Growatt SPF 4000 inverter, a 6.5 kW Growatt battery, and 4 kW of solar panels. I'm considering expanding my system by doubling the number of solar panels. My question is whether I can simply add more panels and a secondary inverter, or if it would be more beneficial to replace the existing inverter with a larger model. How would a second inverter work with new panels in conjunction with my current set-up.
TIA
Shibli
I currently have a solar power system consisting of a Growatt SPF 4000 inverter, a 6.5 kW Growatt battery, and 4 kW of solar panels. I'm considering expanding my system by doubling the number of solar panels. My question is whether I can simply add more panels and a secondary inverter, or if it would be more beneficial to replace the existing inverter with a larger model. How would a second inverter work with new panels in conjunction with my current set-up.
TIA
Shibli
4kw Hyundai Solar split on East and West roofs. Growatt inveter and Growatt 6.5kw battery. iboost connected to 250ltr tank.
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Comments
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Assuming you don't qualify for FIT payments, I suspect either approach would work.
N. Hampshire, he/him. Octopus Intelligent Go elec & Tracker gas / Vodafone BB / iD mobile. Ripple Kirk Hill member.
2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 33MWh generated, long-term average 2.6 Os.Not exactly back from my break, but dipping in and out of the forum.Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs, Best kettle!0 -
I’d suggest replacing the Growatt with a larger Fronius 6kW inverter (assuming all the panels are not on a single South facing aspect) and selling the Growatt on. Better to have a reliable, single point of failure vs two unreliable points of failure.- 10 x 400w LG + 6 x 550W SHARP BiFacial Panels + SE 3680 HD Wave Inverter + SE Optimizers. SE London.
- Triple aspect. (22% ENE/ 33% SSE/ 45% WSW)
- Viessmann 200-W on Advanced Weather Comp. (the most efficient gas boiler sold)Feel free to DM me if I can help with any energy saving!0 -
Unfortunately I have the growatt batteries so not sure if it would be compatible with other brands. No FIT and roof is more west / east facing.Screwdriva said:I’d suggest replacing the Growatt with a larger Fronius 6kW inverter (assuming all the panels are not on a single South facing aspect) and selling the Growatt on. Better to have a reliable, single point of failure vs two unreliable points of failure.4kw Hyundai Solar split on East and West roofs. Growatt inveter and Growatt 6.5kw battery. iboost connected to 250ltr tank.0 -
If roof space is not limited, get a complete second system. DNO might place export limitation or cap at your current export.
This is one of my reasons I went with Enphase, although expensive in every possible way- it does give me the flexibility of adding more panels/systems“Don't raise your voice, improve your argument." - Desmond Tutu
System 1 - 14 x 250W SunModule SW + Enphase ME215 microinverters (July 2015)
System 2 - 9.2 KWp + Enphase IQ7+ and IQ8AC (Feb 22 & Sep 24) + Givenergy AC Coupled inverter + 2 * 8.2KWh Battery (May 2022) + Mitsubishi 7.1 KW and 2* Daikin 2.5 KW A2A Heat Pump0
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