Frequently asked questions
Short answers to what customers and installers ask us most often about Lumentree inverters and batteries.
Do you sell only to installers or also to end customers?
We work with end customers as well as installers and resellers. Installers and resellers get dedicated pricing – get in touch through the quote form.
What size inverter do I need?
It depends on the appliances that run at the same time, start-up surges and your connection type (single- or three-phase). We explain it step by step, with examples from 3.6 to 12 kW, in the guide What size inverter do I need?. If you prefer, we can recommend a system based on the consumption on your bill.
Can I use the inverter without a battery?
Yes. All Lumentree hybrid inverters can also run without a battery, directly from the panels. You can add a battery later.
Can I expand the battery capacity later?
Yes. Lumentree batteries connect in parallel: up to 15 units for the LT-S and LT 20.0-S models and up to 32 units for the LT18.2-S-ND. You can start smaller and add modules when you need them.
Can I export energy to the grid as a prosumer?
Yes, with the S, S-GR, ST-GR, P-GR, T and 3S series and the SUNT-12.0kW-HT model, which support grid export. The HP series and the 6 – 8 kW HT series are designed for off-grid and backup systems.
Can the inverter be installed outdoors?
Yes, the models with an IP65 enclosure – the S, S-GR, ST-GR and 3S series – can be installed outdoors. IP41 models (HP, HT, P-GR, T) are for indoor installation.
Can I monitor the system from my phone?
Yes. Lumentree inverters have Wi-Fi and are monitored in the LightEarth app: production, consumption, battery and grid. For local monitoring without the cloud, you can also use GridEon.
What warranty do the products have?
Products are covered by the manufacturer's warranty. Lumentree LiFePO4 batteries come with a 5-year warranty, extendable to 10 years. You receive the exact terms for each product with your quote.
Where is service carried out?
Locally, in Romania: at the Battrix Energy workshop in Satu Mare. Many issues can be diagnosed remotely through the LightEarth app, and if needed the equipment comes into the workshop. Details on the Service and warranty page.
How do I request a quote and what should I send?
Fill in the quote form or message us on WhatsApp at +40 712 348 437. It helps to know your annual consumption from your bill, your connection type (single- or three-phase), which large appliances you have and whether you want backup during outages.
Didn't find your answer? Write to us and we'll get back to you. Contact
Not sure which system fits you?
Send us your monthly consumption and get a clear recommendation, with no obligation.