Based on recent customer reviews, Sunsynk is widely praised for hardware that performs reliably once running, but heavily criticised for after-sales support. Customers describe inverters and batteries sitting in warranty repair for one to seven months, repeated waits for spare parts, unanswered emails to the customer liaison, and job numbers that cannot be traced. The Sunsynk Connect app and desktop portal draw complaints about logins, timeouts, missing alerts and complexity. Isolated praise goes to individual staff members who tested, replaced and returned units quickly and professionally.
Replied to 54% of negative reviews
Reply time on negative reviews: 15h 45m
TrustIndex
2.7
Ranking
#11
in Electronics & Technology
Reply Time
19h 29m
NPS Score
-67
Recommended: Unlikely
Replied to 54% of negative reviews
Reply time on negative reviews: 15h 45m
Nov '25 - Oct '26
Frequently Asked Questions About Sunsynk
What do customers say about Sunsynk?
Based on recent customer reviews, Sunsynk is widely praised for hardware that performs reliably once running, but heavily criticised for after-sales support. Customers describe inverters and batteries sitting in warranty repair for one to seven months, repeated waits for spare parts, unanswered emails to the customer liaison, and job numbers that cannot be traced. The Sunsynk Connect app and desktop portal draw complaints about logins, timeouts, missing alerts and complexity. Isolated praise goes to individual staff members who tested, replaced and returned units quickly and professionally.
Is Sunsynk trustworthy?
Sunsynk has a TrustIndex of 2.7 out of 10 on Hellopeter, based on 14 reviews in the last 12 months. They reply to 54% of negative reviews, typically within 15 hours 45 min. Hellopeter has tracked Sunsynk across 66 total reviews. How is the TrustIndex calculated? →
Recent reviews (14)
Used this business recently? Share your experience to help others decide.
Used this business recently? Share your experience to help others decide.
Share Your Experience1 reviews | Active since Aug 2011
Sunsynk - Worst company /Service
Over the past 5 months, I have endured 3 failed repair attempts, multiple installer call-out fees, countless follow-ups, and still no resolution from Sunsynk. My inverter has never worked properly since being "repaired" and continues to suffer from unstable power, flickering lights, and unexpected shutdowns. In contrast, the loan unit supp**** by my installer worked perfectly, strongly suggesting that the fault lies with the inverter itself. What has been most frustrating is the complete lack of ownership. I have had to repeatedly chase for updates, answers, and action, while being met with delays, excuses, and requests for information that had already been provided. Despite numerous promises of escalation and management involvement, I am still waiting for a permanent solution, a replacement, a refund, or even a proper technical report explaining what was repaired and why the fault persists. This experience has cost me time, money, and considerable frustration. Customers deserve better service, accountability, and support when dealing with a product failure of this nature.
1 reviews | Active since Aug 2011
Sunsynk - Worst company /Service
Over the past 5 months, I have endured 3 failed repair attempts, multiple installer call-out fees, countless follow-ups, and still no resolution from Sunsynk. My inverter has never worked properly since being "repaired" and continues to suffer from unstable power, flickering lights, and unexpected shutdowns. In contrast, the loan unit supp**** by my installer worked perfectly, strongly suggesting that the fault lies with the inverter itself. What has been most frustrating is the complete lack of ownership. I have had to repeatedly chase for updates, answers, and action, while being met with delays, excuses, and requests for information that had already been provided. Despite numerous promises of escalation and management involvement, I am still waiting for a permanent solution, a replacement, a refund, or even a proper technical report explaining what was repaired and why the fault persists. This experience has cost me time, money, and considerable frustration. Customers deserve better service, accountability, and support when dealing with a product failure of this nature.
1 reviews | Active since Dec 2021
Totally useless customer service
Truly useless customer service. My 5kWh battery was swelling and my installer returned it to Sunsynk for warranty replacement, and said it's previously taken around a month - not great but I can live with it. That was in January (7 months ago!), and I still don't have a replacement, and my installer and I have been unable to even get an answer as to what the holdup is. The customer liason (Chantelle) simply doesn't answer emails, and when I've tried asking on the online support channel, they tell me the job number is incorrect but seem unable to actually help. My installer has gone all the way up to the CEO and still not been able to get an answer.
1 reviews | Active since Dec 2021
Totally useless customer service
Truly useless customer service. My 5kWh battery was swelling and my installer returned it to Sunsynk for warranty replacement, and said it's previously taken around a month - not great but I can live with it. That was in January (7 months ago!), and I still don't have a replacement, and my installer and I have been unable to even get an answer as to what the holdup is. The customer liason (Chantelle) simply doesn't answer emails, and when I've tried asking on the online support channel, they tell me the job number is incorrect but seem unable to actually help. My installer has gone all the way up to the CEO and still not been able to get an answer.
1 reviews | Active since Mar 2009
Poor service
Sadly Sunsynk's support has much to be desired. The agents are non attentive and appear to make up "stories" to justify the performance of my setup. Coupled with that the app and PC browser software is incredibly complex and not at all user friendly ,even for me an electrical engineer !
1 reviews | Active since Mar 2009
Poor service
Sadly Sunsynk's support has much to be desired. The agents are non attentive and appear to make up "stories" to justify the performance of my setup. Coupled with that the app and PC browser software is incredibly complex and not at all user friendly ,even for me an electrical engineer !
1 reviews | Active since May 2023
Sunsynk lacking customer service/communication
Logged a ticket, wifi ****le stopped working 1 week after installation, they were prompt to respond stating it will be sorted out within 48 hours, IT department was going to flash it as it's a known problem etc. Its now been a full week and they refuse to respond to my daily queries for feedback via email, their app or phone call. So not a great start, the inverter works well, would be nice to monitor it though.
1 reviews | Active since May 2023
Sunsynk lacking customer service/communication
Logged a ticket, wifi ****le stopped working 1 week after installation, they were prompt to respond stating it will be sorted out within 48 hours, IT department was going to flash it as it's a known problem etc. Its now been a full week and they refuse to respond to my daily queries for feedback via email, their app or phone call. So not a great start, the inverter works well, would be nice to monitor it though.
1 reviews | Active since Jun 2024
Terrible service regarding JOB 13677
I would like to give you a timeline breakdown regarding our after-sale service with Suncynk. January 2023 Our system was installed 28 April 2026 Our system stopped working. Called our installer who confirmed that it had to go back to Synsynk for repairs. He also warned us to be patient as Sunsynk is not very good at communication. It can take between 1 – 2 months. May 11th 2026 Sunsynk confirmed that they had received our unit Then we waited patiently July 1st 2026 I sent Chantelle an email enquiring about our unit. Our installer warned us that the chances of her replying to our email are very slim.... and so it was. No reply. July 3rd 2026 Our installer received an email from Synsynk saying that the unit would be ready the following week which then should have been somewhere between the 6-11 July 2026. July 11th 2026 I sent Chantelle another email informing her that she leaves me no choice as to seek help elsewhere as she chooses to ignore/not answer any queries directed to her. This was after I confirmed with our installer that he has not heard anything further from Sunsynk. Today is July 19th 2026.... well on our way to almost 3 months with no communication from Sunsynk whatsoever. How is that fair to a customer? If anybody is willing or able to respond to this request it would be greatly appreciated.
1 reviews | Active since Jun 2024
Terrible service regarding JOB 13677
I would like to give you a timeline breakdown regarding our after-sale service with Suncynk. January 2023 Our system was installed 28 April 2026 Our system stopped working. Called our installer who confirmed that it had to go back to Synsynk for repairs. He also warned us to be patient as Sunsynk is not very good at communication. It can take between 1 – 2 months. May 11th 2026 Sunsynk confirmed that they had received our unit Then we waited patiently July 1st 2026 I sent Chantelle an email enquiring about our unit. Our installer warned us that the chances of her replying to our email are very slim.... and so it was. No reply. July 3rd 2026 Our installer received an email from Synsynk saying that the unit would be ready the following week which then should have been somewhere between the 6-11 July 2026. July 11th 2026 I sent Chantelle another email informing her that she leaves me no choice as to seek help elsewhere as she chooses to ignore/not answer any queries directed to her. This was after I confirmed with our installer that he has not heard anything further from Sunsynk. Today is July 19th 2026.... well on our way to almost 3 months with no communication from Sunsynk whatsoever. How is that fair to a customer? If anybody is willing or able to respond to this request it would be greatly appreciated.
1 reviews | Active since Jan 2010
Dont understimate Support
One makes solar purchase decisions based on many factors being brand, installer, support, friends etc. Unfortunately, not enough consideration to the support factor s given at the time of purchase. My Sunsynk started giving a problem around 17th June as it got stuck whilst receiving a remote firmware upgrade. On 29th June, it collapsed completely whilst Sunsynk tried again to push through on the remote firmware update in the presence of the installer. Over a week since then, and I still cant get a reply from the Sunsynk whatsapp contact I was in touch with. My installer can't seem to get more than "in assessment" either. Having been a huge proponent of Sunsynk in my retirement village, where I guess there must be more than 50 Sunsynk installations, who has egg on their face now? Consider the support factor a LOT more and don't follow like sheep!
1 reviews | Active since Jan 2010
Dont understimate Support
One makes solar purchase decisions based on many factors being brand, installer, support, friends etc. Unfortunately, not enough consideration to the support factor s given at the time of purchase. My Sunsynk started giving a problem around 17th June as it got stuck whilst receiving a remote firmware upgrade. On 29th June, it collapsed completely whilst Sunsynk tried again to push through on the remote firmware update in the presence of the installer. Over a week since then, and I still cant get a reply from the Sunsynk whatsapp contact I was in touch with. My installer can't seem to get more than "in assessment" either. Having been a huge proponent of Sunsynk in my retirement village, where I guess there must be more than 50 Sunsynk installations, who has egg on their face now? Consider the support factor a LOT more and don't follow like sheep!
1 reviews | Active since Jul 2016
Please fix the app!!
The system itself works fine (couple of glitches occasionally, but nothing that I can’t deal with). The app, on the other hand, gives me grey hair. I seem to be permanently logging in again with my password (there was a reason why the installer told me to choose an easy password that I could remember and type in, he knew this was an issue), and half the time I get “time outs” or no data at all. It’s not always practical to walk to the inverter to look at it, the idea behind an app is to be able to remotely access the system. You can’t have the “app equivalent” on your desktop, so if the app doesn’t work, and you are not at home, you’re stuck.
1 reviews | Active since Jul 2016
Please fix the app!!
The system itself works fine (couple of glitches occasionally, but nothing that I can’t deal with). The app, on the other hand, gives me grey hair. I seem to be permanently logging in again with my password (there was a reason why the installer told me to choose an easy password that I could remember and type in, he knew this was an issue), and half the time I get “time outs” or no data at all. It’s not always practical to walk to the inverter to look at it, the idea behind an app is to be able to remotely access the system. You can’t have the “app equivalent” on your desktop, so if the app doesn’t work, and you are not at home, you’re stuck.
1 reviews | Active since May 2018
Bad Customer support
★☆☆☆☆ I am extremely disappointed with the after-sales service from Sunsynk South Africa. My 5kVA Sunsynk inverter has been awaiting parts for an unreasonably long time under Job #12214, and despite multiple follow-ups, the issue remains unresolved. While products can occasionally develop faults, customers should not have to wait indefinitely for repairs due to parts shortages or service delays. The lack of urgency and communication has been frustrating and has left me without confidence in the support process. As a customer, I expected a much higher standard of after-sales service from a leading inverter brand. I hope Sunsynk South Africa will prioritize resolving Job #12214 and improve their turnaround times and customer communication going forward.
1 reviews | Active since May 2018
Bad Customer support
★☆☆☆☆ I am extremely disappointed with the after-sales service from Sunsynk South Africa. My 5kVA Sunsynk inverter has been awaiting parts for an unreasonably long time under Job #12214, and despite multiple follow-ups, the issue remains unresolved. While products can occasionally develop faults, customers should not have to wait indefinitely for repairs due to parts shortages or service delays. The lack of urgency and communication has been frustrating and has left me without confidence in the support process. As a customer, I expected a much higher standard of after-sales service from a leading inverter brand. I hope Sunsynk South Africa will prioritize resolving Job #12214 and improve their turnaround times and customer communication going forward.