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Eversolar Inverters – Relay Check Fail

Eversolar TL2000

Eversolar TL2000

Eversolar TL1500 and TL2000 models may show the error “Relay Check Fail” on their display. When a grid-tied inverter is first powered up it performs several tests, and this particular error means that the grid connect relay has failed. This is the most common fault that we have experienced with these models.

In the event of this fault the following options are available to you:

1. Warranty claim

Eversolar inverters were sold with a five year warranty as standard, so if your inverter is under 5 years old then a warranty claim might be an option. However, Eversolar were acquired by SMA in December 2012 and are now called Zeversolar. Their UK support was subsequently moved to Germany and while they do honour the warranties on these devices, service replacements are slow to arrive and in some cases the delay has run into several months. Particularly for those on the original feed in tariff, the revenue losses due to a faulty inverter can be significant during the summer months.

In order to claim on the warranty you will require your original purchase invoice, showing the model number of your inverter and the fact that the invoice was paid in full. Many installers did not issue such documentation which makes it hard to claim on the warranty.

2. Repair the inverter

The grid connect relay can be replaced and in some countries there are repair shops that provide this service. We have successfully repaired a TL2000 inverter with this fault, but have chosen not to offer this service to customers due to the ambiguity of ongoing warranty obligations and it not being cost-effective. However, if you are technically minded you may wish to have a go at repairing your inverter.

3. Purchase a replacement

Many customers choose to replace their inverter. An excellent replacement for the Eversolar TL1500 is the Solis Mini 1.5kW inverter, and to replace the Eversolar TL2000 the Solis 2.0kW Mini inverter or in some cases the Solis 2.5kW Mini inverter. The plug types and connection layout are the same on these Solis models, which makes a do-it-yourself replacement a simple matter of changing the wall bracket and plugging in the replacement inverter. Both of these can be purchased from our Online Store.

We also offer an installation service if you do not wish to get involved in the replacement. Contact us for more information.

Solar PV repair enquiry form

For repairs to your solar PV system, please call us on 01772 311016 or complete this form and we will contact you.
Please note that we are a small company in North West England. We can assist with replacement parts anywhere in the UK but can only offer a call out service locally.
e.g. Are there any fault codes on the inverter screen? Any unusual noises or smells?
Your inverter model number and serial number can usually be found on a label on the side or underside of your inverter.