Solar inverter repair
Solar inverter repair in Riga: PV inverters, MPPT controllers, BMS boards, DC bus, relays, power stages and power supplies. Component diagnostics.
Does the solar inverter show an error, refuse to connect to the grid, fail to charge the battery or stay completely dead? At the SATER workshop on Silmacu 6 we diagnose PV inverters and related power electronics at component level. We work with grid-tie and hybrid inverters, MPPT controllers, BMS boards, charging modules, UPS inverters and home energy-storage electronics. We check DC input circuits, fuses, relays, MOSFET/IGBT power stages, electrolytic capacitors, drivers, sensing circuits, insulation faults, communication modules and power-supply boards. If the original board is unavailable or a new unit is disproportionately expensive, it is often possible to replace the exact component, restore PCB traces or fit a compatible alternative. We do not install solar panels on site; we work with the electronic unit, board or inverter brought to our workshop.
Popular models we repair
- Huawei SUN2000
- Fronius Primo / Symo
- SMA Sunny Boy / Sunny Tripower
- Growatt MIN / MOD / SPH
- GoodWe DNS / ET / EH
- Solis S5 / S6
- Victron MultiPlus / Quattro
- Deye / Sunsynk hybrid inverters
- SolarEdge SE series
- ABB / FIMER UNO and TRIO
- Kostal Plenticore
- SofarSolar and Delta
Common problems we fix
- Inverter will not power on or stays in standby
- Isolation, PV input, DC bus, grid or relay error
- MPPT controller does not charge the battery or reads the wrong voltage
- Hybrid inverter will not switch to battery or cannot see the BMS
- Surge damage to varistors, fuses, MOSFETs or IGBTs
- Swollen or dried electrolytic capacitors
- Fan spins but the inverter never enters operating mode
- Communication fault with Wi-Fi, RS485, CAN or the energy meter
- In UPS or off-grid mode the load cuts out at low power
PV inverter power-stage diagnostics
In PV inverter repair we first separate the control section from the power section. On the DC input we check fuses, varistors, protective parts and insulation measurements. Then come the DC bus, large electrolytic capacitors, IGBT or MOSFET stages, drivers and the relays that connect the inverter to the grid. In many cases the whole board is not dead; the fault is one power component or a control-circuit part.
MPPT, BMS and energy-storage electronics
In hybrid systems the fault is often not in the inverter itself but in the MPPT charging circuit, BMS communication or battery measurement. We check CAN/RS485 links, balancing circuits, temperature sensors, current shunts and power regulators. If the system cannot see the battery, reads the wrong voltage or cuts load too early, these are the circuits we start with.
Pricing & warranty
Diagnostics after an initial consultation. Warranty: 3 months.
If the repair cost changes during the process, the technician will call to agree on the new price. No work is done without your consent.
Frequently asked questions
Why customers choose SATER
- Individual approach to every device. No off-the-shelf solution? We develop a repair method for your specific case.
- Component-level PCB repair. We work with SMD components, BGA soldering and non-standard modules.
- Free initial consultation. Bring the device in — we'll assess repairability and give you a ballpark quote.
- 30+ years of experience. The service centre has been operating since 1993.
- We serve all of Latvia. Electronics service centre in Riga — we accept devices from anywhere in the country.