Go Power GP-PT-400 400W Solar & 3000W Inverter Charger System

The Go Power GP-PT-400 is a complete off-grid power system, not just a pair of panels in a box. You get 400 watts of Eclipse rigid solar, a 3000 watt pure sine wave inverter/charger, a 30 amp MPPT controller, and the wiring and hardware to tie it all together. It's built for the boat or RV that runs real loads at anchor or off the grid, not just a phone charger and an LED string. Everything in it is designed to work as one system, which is a big deal when you're piecing together a house-bank build.

Here's what's actually in the box. One GP-ECLIPSE-200 solar kit brings the first 200 watts, and one ECLIPSE-200-E expansion panel adds the second 200. Both panels are the rigid, black-framed Eclipse module measuring 59.1 inches long by 26.3 inches wide and just 1.57 inches thick, so they sit low on a hardtop, arch, or RV roof without catching much wind. A 30 amp GP-RVC-MPPT-30 solar controller does the charging, and it's stackable, so if you add more panels down the road the controllers work together instead of fighting each other.

The heart of the system is the GP-IC-3000, a 3000 watt pure sine wave inverter/charger. Pure sine matters. It runs sensitive electronics, microwaves, and induction cooktops the way shore power would, and as a charger it tops your bank back up fast when you do plug into shore or run the genset. A 3 inch GP-RVC-DISP-3 color touchscreen gives you a clean readout of what's coming in from the panels and going out to your loads, mounted at the nav station or the RV control panel where you'll actually look at it.

Go Power includes the parts most kits make you source separately. You get the GP-DC-KIT5 DC inverter install kit, a 25 foot red and a 25 foot black solar output cable so you can reach the roof from the battery bay, the GP-MH-4-KB mounting hardware, and the bracket-mount feet for the panels. That's a real head start on a clean install instead of three more trips to the parts counter.

A few notes from the install side. The Eclipse panels are thin and light, which is great, but on a boat arch or radar mount add a backing plate behind the bracket feet so the frame doesn't flex and crack over time. On a sailboat, splitting the two panels port and starboard instead of stacking them centerline recovers a good chunk of daily yield when the boom or a dodger throws shade. And keep the expansion panel at the same tilt as the main kit. Mismatched angles make the MPPT controller hunt and cost you output.

Wire it right and it'll last. Undersized wire over a long run is the most common mistake, and it quietly drops your voltage and your charge current. The included 25 foot cables are sized for the job, so don't neck them down at the terminations. On a saltwater boat, hit the stainless bracket hardware with dielectric grease at install and check it once a season. The panels and controller are happy in the weather. It's the fasteners that need the attention.

Who's this for? Cruisers who want to sit at anchor for days without running the engine, RVers who boondock and need to run a residential fridge and a microwave, and anyone building out a house bank that has to carry real loads. It's a serious system at a serious size, so make sure you've got roughly five by four and a half feet of clear, sun-facing mounting space for the two panels before you buy.

What it isn't: a plug-and-play weekend trickle charger. This is a hardwired, whole-boat or whole-rig install with a 3000 watt inverter that needs proper fusing and a battery bank sized to match. If you're comfortable with DC wiring, or you've got a tech who is, it's one of the cleanest 400 watt packages you can buy because every piece in it was engineered to run together.