Marey is a Puerto Rico-based tankless water heater brand specializing in point-of-use and off-grid applications. Two distinct product lines: outdoor propane tankless (GA series — battery-powered, for cabins, RVs, and outdoor showers) and indoor electric tankless (ECO series — competing with EcoSmart at the budget end of whole-house electric).
When Marey is the right brand
- Cabin / off-grid: battery-ignition propane tankless eliminates the need for any electrical hookup
- RV exterior shower: outdoor-rated GA series mounts on the RV exterior
- Budget electric tankless: ECO series at 30-50% lower price than Rheem or Stiebel
- Tiny home / ADU: compact tankless without the cost of premium brands
The Marey water heater lineup
The battery-ignition advantage
The GA series uses 2 D-cell batteries for ignition — no AC power, no 12V hookup, no electrical service required. This makes Marey the practical choice for:
- Off-grid cabins without electrical service
- RV exterior shower (mounted outside the RV)
- Backyard outdoor showers
- Workshop or barn applications
- Hunting cabin / remote workshop
Which Marey is right?
- Outdoor shower / RV exterior: GA10LP or GA16LP
- Cabin with 1 fixture: GA10LP
- Cabin with 1 bathroom: GA16LP or GA22LP
- Indoor cabin with venting: Power Gas 10L
- Budget whole-house electric: ECO180 (warm) or ECO270 (moderate)
Warranty
- GA outdoor: 5 years heat exchanger
- ECO electric: 5-10 years depending on model
- Other parts: 1 year
- Labor not covered
Marey vs alternatives
Bottom line
Marey is the off-grid / cabin / outdoor tankless brand. GA16LP volume outdoor pick; ECO180/270 budget whole-house electric. Battery ignition eliminates electrical service requirement — a unique Marey advantage. Build quality is mid-tier; warranty is competitive; pricing is significantly below premium brands.