What an 800V LT Panel Is, and Why Big Solar Plants Use It
An 800V LT panel aggregates and distributes the AC output of high-voltage string inverters — the 1500 V DC generation that outputs 800 V AC — in MW-scale solar plants. Running the LT collection at 800 V instead of 415 V cuts the current roughly in half for the same power, which cuts conductor sizes, cable counts, combiner stages and I²R transmission losses across the whole balance of system. That is why modern utility-scale plants standardise on it.
Wisdom Techno Solutions builds 800V LT panels at our Vadodara works with 800 V class switchgear per IEC 60947, busbars sized with thermal margin for the combined inverter current, surge protection rated for the 800 V system, and energy metering with SCADA-ready monitoring provisions. Assembly follows IEC 61439-1 and -2 practice, in powder-coated CRCA enclosures for indoor or outdoor installation.
- 800 V class MCCBs / ACBs per feeder — standard 415 V devices are not a substitute at this voltage
- Roughly half the current of a 415 V scheme for the same power — smaller cables, fewer runs, lower losses
- SPD rated for the 800 V system, coordinated with the plant lightning-protection design
- Energy metering and remote SCADA monitoring provisions built in
- Fault isolation per inverter group, so one fault does not shut the block
- Indoor or outdoor execution, IP54 / IP65
800V LT Panel Technical Specifications
The table below is the standard build. Feeder count, device ratings and busbar size are set from the inverter schedule and the block single line diagram.
| Parameter | Specification |
|---|---|
| Board type | 800 V class LT panel — aggregates and distributes the AC output of high-voltage string inverters in MW-scale solar plants |
| Rated voltage | 800 V AC class (against the conventional 415 V LT level) |
| Typical application | MW-scale solar plants using 1500 V DC string inverters with 800 V AC output |
| Function | Safe power collection, feeder protection, fault isolation, energy metering |
| Feeder protection | MCCBs / ACBs rated for the 800 V class, per the inverter schedule |
| Surge protection | AC surge protection device rated for the 800 V system |
| Monitoring | Energy metering and provisions for remote SCADA monitoring |
| Busbar | Copper or aluminium, sized for the combined current with thermal margin |
| Enclosure | Powder-coated CRCA sheet steel; indoor or outdoor execution per site |
| Ingress protection | IP54 indoor; IP65 outdoor |
| Component standards | 800 V class switchgear per IEC 60947 |
| Assembly practice | IEC 61439-1 and IEC 61439-2 practice |
| Testing | Routine tests and inspection at the works before dispatch, with test report |
| Facility | Kotambi, Vadodara, Gujarat, India |
| Delivery | 6 to 7 weeks from drawing approval, subject to switchgear availability |
800 V vs 415 V LT Collection — What Changes
| 415 V LT scheme | 800 V LT scheme | |
|---|---|---|
| Current for the same power | Baseline | Roughly half |
| Cable cost and count | Higher — more parallel runs | Lower — fewer, smaller runs |
| Transmission losses | Higher I²R losses | Substantially lower |
| Switchgear | Standard 415 V LT devices | 800 V class devices — specified, not assumed |
| Where it wins | Small and rooftop plants | MW-scale plants with 1500 V DC string inverters |
The saving is real but the discipline matters: every device in the panel must actually be rated for the 800 V class. A 415 V breaker in an 800 V board is not a cost saving — it is a failure waiting for its first fault.
What to Send for an 800V LT Panel Quotation
The inverter schedule (model, count, AC output current at 800 V), the block layout and how inverters group per panel, the outgoing arrangement to the transformer, metering and SCADA requirements, and the site conditions (indoor/outdoor, IP rating). A block single line diagram is the ideal input — send it through the Get a Quote form.
How Wisdom Techno Solutions Builds 800V LT Panels
The same LT switchboard discipline as our industrial boards, applied at the 800 V class: busbar sizing with thermal margin, clearances and creepage checked for the higher voltage, GA and SLD drawings approved before manufacturing, routine tests and inspection before dispatch with the test report shipped. Where the plant also needs the low-voltage side — ACDB, combiner boxes, DCDB and AJBs — one works supplies the matched package.
Related Technical Guides
- Load List & Incomer Sizing Guide — how combined currents size the upstream boards
- BESS Electrical Panel Design — PCS, ACDB & DCDB — the same boards in battery-coupled plants
- Icu / Ics / Icw — Short-Circuit Ratings Explained — how to state the short-circuit requirement correctly
- LT Panel Specification & RFQ Guide — how to specify a board so quotes are comparable
Related Panel Types
If this is not the right fit for your layout, these are the related products we build to the same standard:
- AC Distribution Board — the 415 V class solar distribution board
- AC Combiner Box — collects string-inverter outputs before distribution
- LT Panel Range in Vadodara — the complete LT panel family we build, on one page
- Solar BOS Electrical Package — the complete solar board package from one works
- PCC Panels — plant-side LT power distribution to IEC 61439
Send Your Single Line Diagram
Email your single line diagram, load list and system fault level and our engineers will come back with a technical offer. Not sure what to send? See what a panel manufacturer needs in order to quote accurately.
| Manufacturer | Wisdom Techno Solutions |
| Works | Plot 9, Nilkanth Industrial Park 1, near Kotambi Stadium, Kamrol, Kotambi, Vadodara, Gujarat 391510, India |
| connect@wisdomtechnosolutions.com | |
| Phone | +91 80002 29727 |
| Working hours | Monday to Saturday, 8:00 am to 5:00 pm IST |
| Delivery lead time | 6 to 7 weeks from drawing approval, subject to switchgear availability |
Frequently Asked Questions About 800V LT Panels
Page updated: 17 September 2026