# Boat Solar Panel Installation Cost (2026) | Long Beach Marine Electric

> Boat solar panel installation cost in 2026: a 400 W system with MPPT runs about $1,300–$3,100 installed before custom mounts. Parts, labor and output shown.

URL: https://longbeachmarineelectric.com/guide/marine-solar-installation-cost/

Cost Guide

# Boat Solar Panel Installation Cost (2026): A 400 W System Priced Out

Panels are cheap. Mounting, wiring and set-up are where the cost and the quality are.

By Long Beach Marine Electric · Updated October 6, 2026

**Short answer:** Boat solar panel installation cost for a 400 W rigid-panel system with an MPPT controller typically runs about $1,300–$3,100 installed in 2026: roughly $480 in panels, $135–$160 for a Victron SmartSolar MPPT 100/30, $100–$300 in wiring and fusing, and 4–10 hours of labor. Custom arches and frames cost extra.

[Long Beach Marine Electric](/) connects boat owners with marine electricians who install solar, and this guide prices out typical boat solar panel installation cost for a 400-watt system, the most common size for boats that sit on moorings, anchor out or live aboard. Parts prices are published 2026 retail. Labor is at Long Beach rates of **$140–$200 per hour**. Treat the totals as estimates. Mounting is the big variable.

## A 400 W system, priced out

Item

Basis

Estimate

Panels: 4 × 100 W rigid

~$120 each retail

~$480

MPPT controller

Victron SmartSolar MPPT 100/30, ~$135–$160

~$135–$160

Wiring, fuses, connectors, deck gland

PV wire, MC4 connectors, fuses

$100–$300

Standard mounts

Rail or bracket mounts

$50–$200

Labor

4–10 hrs at $140–$200

$560–$2,000

**Estimated total**

**~$1,300–$3,100**

A custom stainless arch or hardtop frame is a separate fabrication job and often costs more than the solar system itself.

## What you get for it

Solar.com models a well-oriented array in Long Beach at about **1,674 kWh per kW per year**, roughly 4.6 kWh per kW per day even with the coastal marine layer. Four hundred watts works out to about 1.8 kWh a day, close to 150 amp-hours at 12 volts before losses. Boat panels are usually flat and partly shaded by booms, masts or radar, so plan on 50–70% of that. That’s still enough to keep a mooring boat’s batteries and bilge pump covered, or to replace a night’s anchor light, instruments and fridge.

## Where the money goes

-   **Shade survey and layout.** A shaded panel can drag down a whole string, so placement matters more than wattage.
-   **Deck penetrations.** Sealed cable glands keep water out of the deck core.
-   **Wire sizing.** PV wiring is sized for low loss and fused at the battery.
-   **Controller set-up.** The MPPT controller’s profile is set to your battery chemistry, especially important with [lithium](/lithium-battery-conversion/).

## Rigid vs flexible

Rigid panels on an arch, hardtop or rail mounts last longest and stay cooler. Semi-flexible panels suit biminis and curved surfaces and are lighter, but they usually cost more per watt and age faster in Southern California sun.

## Bottom line

Budget about **$1,300–$3,100 installed for a 400 W rigid system**, plus fabrication if you need an arch. Start with an energy budget of what runs while you’re away from shore power. See [marine solar panel installation](/marine-solar-installation/) or call **(562) 374-7233** for a same-day callback.

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## Sources

-   [Explorist.life: Victron SmartSolar MPPT 100/30 and 100 W panel prices](https://shop.explorist.life/shop/all-products/400w-solar-charging-wiring-kit-4x-100w-12v-battery-bank/)
-   [Solar.com: Long Beach solar production (1,674 kWh/kW/yr)](https://www.solar.com/ca/long-beach/)
-   [Trawler Forum: 2026 marine electrician labor rates](https://www.trawlerforum.com/threads/labor-rate-for-high-quality-electrical-work-by-abyc-certified-marine-electrician.78378/)

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Bimini, arch and deck-mounted panels with MPPT controllers, sized to keep moored and liveaboard boats topped up.

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Straight answers

## Related questions

### How much power will 400 W of solar make in Long Beach?

A well-oriented array in Long Beach produces about 1,674 kWh per kW per year, roughly 4.6 kWh per kW per day. That's about 1.8 kWh a day from 400 W, close to 150 Ah at 12 V, before losses. Flat-mounted, partly shaded boat panels often deliver 50–70% of that.

### Do flexible panels cost less to install?

Mounting is often simpler on a bimini, but semi-flexible panels usually cost more per watt and run hotter, which shortens their life. Rigid panels on an arch or hardtop are the longer-lasting choice.

### Is an MPPT controller worth the extra cost over PWM?

On most boat systems, yes. The price difference is small, and MPPT harvests more energy, especially in heat and partial shade, with proper charge profiles for lithium and AGM.

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